diff --git a/codestyle/checkstyle.xml b/codestyle/checkstyle.xml
index ffdafd15f44..621a9e37bca 100644
--- a/codestyle/checkstyle.xml
+++ b/codestyle/checkstyle.xml
@@ -20,5 +20,11 @@
         <module name="NoLineWrap"/>
         <module name="OuterTypeFilename"/>
         <module name="UnusedImports"/>
+
+        <module name="CustomImportOrder">
+            <property name="specialImportsRegExp" value="org.apache.dubbo.*"/>
+            <property name="sortImportsInGroupAlphabetically" value="false"/>
+            <property name="customImportOrderRules" value="SPECIAL_IMPORTS###THIRD_PARTY_PACKAGE###STANDARD_JAVA_PACKAGE###STATIC"/>
+        </module>
     </module>
 </module>
\ No newline at end of file
diff --git a/codestyle/dubbo_codestyle_for_idea.xml b/codestyle/dubbo_codestyle_for_idea.xml
index 4c632e4b288..1f87caa7135 100644
--- a/codestyle/dubbo_codestyle_for_idea.xml
+++ b/codestyle/dubbo_codestyle_for_idea.xml
@@ -5,8 +5,6 @@
         <value>
             <package name="org.apache.dubbo" withSubpackages="true" static="false"/>
             <emptyLine/>
-            <package name="com.taobao" withSubpackages="true" static="false"/>
-            <emptyLine/>
             <package name="" withSubpackages="true" static="false"/>
             <emptyLine/>
             <package name="javax" withSubpackages="true" static="false"/>
diff --git a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/tag/TagRouter.java b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/tag/TagRouter.java
index 38fd6166eff..e9a3b5b8696 100644
--- a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/tag/TagRouter.java
+++ b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/tag/TagRouter.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.rpc.cluster.router.tag;
 
-
 import org.apache.dubbo.common.Constants;
 import org.apache.dubbo.common.URL;
 import org.apache.dubbo.common.logger.Logger;
diff --git a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/tag/TagRouterFactory.java b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/tag/TagRouterFactory.java
index 05ad427ce6e..f827b08d51f 100644
--- a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/tag/TagRouterFactory.java
+++ b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/tag/TagRouterFactory.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.rpc.cluster.router.tag;
 
-
 import org.apache.dubbo.common.URL;
 import org.apache.dubbo.rpc.cluster.Router;
 import org.apache.dubbo.rpc.cluster.RouterFactory;
diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/compiler/Compiler.java b/dubbo-common/src/main/java/org/apache/dubbo/common/compiler/Compiler.java
index 7c55a2910a3..3b8961d83f2 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/compiler/Compiler.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/compiler/Compiler.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.common.compiler;
 
-
 import org.apache.dubbo.common.extension.SPI;
 
 /**
diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/compiler/support/AdaptiveCompiler.java b/dubbo-common/src/main/java/org/apache/dubbo/common/compiler/support/AdaptiveCompiler.java
index b47857c6861..a0c5cc6b415 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/compiler/support/AdaptiveCompiler.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/compiler/support/AdaptiveCompiler.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.common.compiler.support;
 
-
 import org.apache.dubbo.common.compiler.Compiler;
 import org.apache.dubbo.common.extension.Adaptive;
 import org.apache.dubbo.common.extension.ExtensionLoader;
diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/logger/jcl/JclLogger.java b/dubbo-common/src/main/java/org/apache/dubbo/common/logger/jcl/JclLogger.java
index c88c1ab0bf1..59e30e24bb0 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/logger/jcl/JclLogger.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/logger/jcl/JclLogger.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.common.logger.jcl;
 
 import org.apache.dubbo.common.logger.Logger;
+
 import org.apache.commons.logging.Log;
 
 import java.io.Serializable;
diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/logger/jcl/JclLoggerAdapter.java b/dubbo-common/src/main/java/org/apache/dubbo/common/logger/jcl/JclLoggerAdapter.java
index 6a80695250b..4ff23c66b96 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/logger/jcl/JclLoggerAdapter.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/logger/jcl/JclLoggerAdapter.java
@@ -19,6 +19,7 @@
 import org.apache.dubbo.common.logger.Level;
 import org.apache.dubbo.common.logger.Logger;
 import org.apache.dubbo.common.logger.LoggerAdapter;
+
 import org.apache.commons.logging.LogFactory;
 
 import java.io.File;
diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/threadpool/support/eager/EagerThreadPoolExecutor.java b/dubbo-common/src/main/java/org/apache/dubbo/common/threadpool/support/eager/EagerThreadPoolExecutor.java
index f8eb5df2c85..d35e8d8f6cd 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/threadpool/support/eager/EagerThreadPoolExecutor.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/threadpool/support/eager/EagerThreadPoolExecutor.java
@@ -17,11 +17,11 @@
 
 package org.apache.dubbo.common.threadpool.support.eager;
 
+import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.RejectedExecutionHandler;
 import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.atomic.AtomicInteger;
 
 /**
diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/timer/HashedWheelTimer.java b/dubbo-common/src/main/java/org/apache/dubbo/common/timer/HashedWheelTimer.java
index 7801ce06a47..f786caeb8cc 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/timer/HashedWheelTimer.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/timer/HashedWheelTimer.java
@@ -20,17 +20,17 @@
 import org.apache.dubbo.common.logger.LoggerFactory;
 import org.apache.dubbo.common.utils.ClassHelper;
 
-import java.util.Queue;
-import java.util.Set;
-import java.util.HashSet;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.Locale;
+import java.util.Queue;
+import java.util.Set;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
diff --git a/dubbo-compatible/src/main/java/com/alibaba/dubbo/config/spring/context/annotation/EnableDubbo.java b/dubbo-compatible/src/main/java/com/alibaba/dubbo/config/spring/context/annotation/EnableDubbo.java
index 0c25432403a..1310d1a2032 100644
--- a/dubbo-compatible/src/main/java/com/alibaba/dubbo/config/spring/context/annotation/EnableDubbo.java
+++ b/dubbo-compatible/src/main/java/com/alibaba/dubbo/config/spring/context/annotation/EnableDubbo.java
@@ -20,6 +20,7 @@
 import org.apache.dubbo.config.AbstractConfig;
 import org.apache.dubbo.config.spring.context.annotation.CompatibleDubboComponentScan;
 import org.apache.dubbo.config.spring.context.annotation.EnableDubboConfig;
+
 import org.springframework.core.annotation.AliasFor;
 
 import java.lang.annotation.Documented;
diff --git a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleReferenceAnnotationBeanPostProcessor.java b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleReferenceAnnotationBeanPostProcessor.java
index 009bd28f805..544b1cb0bdc 100644
--- a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleReferenceAnnotationBeanPostProcessor.java
+++ b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleReferenceAnnotationBeanPostProcessor.java
@@ -16,9 +16,9 @@
  */
 package org.apache.dubbo.config.spring.beans.factory.annotation;
 
-import com.alibaba.dubbo.config.annotation.Reference;
-
 import org.apache.dubbo.config.spring.ReferenceBean;
+
+import com.alibaba.dubbo.config.annotation.Reference;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.beans.BeanUtils;
diff --git a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleReferenceBeanBuilder.java b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleReferenceBeanBuilder.java
index 924ffcbee3a..cb2ba68a51a 100644
--- a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleReferenceBeanBuilder.java
+++ b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleReferenceBeanBuilder.java
@@ -16,12 +16,12 @@
  */
 package org.apache.dubbo.config.spring.beans.factory.annotation;
 
-import com.alibaba.dubbo.config.annotation.Reference;
-
 import org.apache.dubbo.config.ConsumerConfig;
 import org.apache.dubbo.config.spring.ReferenceBean;
 import org.apache.dubbo.config.spring.convert.converter.StringArrayToMapConverter;
 import org.apache.dubbo.config.spring.convert.converter.StringArrayToStringConverter;
+
+import com.alibaba.dubbo.config.annotation.Reference;
 import org.springframework.context.ApplicationContext;
 import org.springframework.core.convert.ConversionService;
 import org.springframework.core.convert.support.DefaultConversionService;
diff --git a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleServiceAnnotationBeanPostProcessor.java b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleServiceAnnotationBeanPostProcessor.java
index b2ab6151be5..5f4d9903521 100644
--- a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleServiceAnnotationBeanPostProcessor.java
+++ b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/CompatibleServiceAnnotationBeanPostProcessor.java
@@ -16,12 +16,12 @@
  */
 package org.apache.dubbo.config.spring.beans.factory.annotation;
 
-import com.alibaba.dubbo.config.annotation.Service;
-
 import org.apache.dubbo.common.logger.Logger;
 import org.apache.dubbo.common.logger.LoggerFactory;
 import org.apache.dubbo.config.spring.ServiceBean;
 import org.apache.dubbo.config.spring.context.annotation.DubboClassPathBeanDefinitionScanner;
+
+import com.alibaba.dubbo.config.annotation.Service;
 import org.springframework.beans.BeansException;
 import org.springframework.beans.MutablePropertyValues;
 import org.springframework.beans.factory.BeanClassLoaderAware;
diff --git a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/context/annotation/CompatibleDubboComponentScanRegistrar.java b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/context/annotation/CompatibleDubboComponentScanRegistrar.java
index df41b6e131b..089bdda8cdf 100644
--- a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/context/annotation/CompatibleDubboComponentScanRegistrar.java
+++ b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/context/annotation/CompatibleDubboComponentScanRegistrar.java
@@ -19,6 +19,7 @@
 import org.apache.dubbo.config.spring.beans.factory.annotation.CompatibleReferenceAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.beans.factory.annotation.CompatibleServiceAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.util.BeanRegistrar;
+
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.support.AbstractBeanDefinition;
diff --git a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/schema/CompatibleAnnotationBeanDefinitionParser.java b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/schema/CompatibleAnnotationBeanDefinitionParser.java
index c5e7bfaca8c..66d6ac2dcc3 100644
--- a/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/schema/CompatibleAnnotationBeanDefinitionParser.java
+++ b/dubbo-compatible/src/main/java/org/apache/dubbo/config/spring/schema/CompatibleAnnotationBeanDefinitionParser.java
@@ -17,11 +17,10 @@
 package org.apache.dubbo.config.spring.schema;
 
 import org.apache.dubbo.config.spring.AnnotationBean;
-
 import org.apache.dubbo.config.spring.beans.factory.annotation.CompatibleReferenceAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.beans.factory.annotation.CompatibleServiceAnnotationBeanPostProcessor;
-
 import org.apache.dubbo.config.spring.util.BeanRegistrar;
+
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/AnnotationBean.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/AnnotationBean.java
index 6b54a395db8..874fedc44f7 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/AnnotationBean.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/AnnotationBean.java
@@ -32,6 +32,7 @@
 import org.apache.dubbo.config.ServiceConfig;
 import org.apache.dubbo.config.annotation.Reference;
 import org.apache.dubbo.config.annotation.Service;
+
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.DisposableBean;
 import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/ReferenceBean.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/ReferenceBean.java
index bd6195ccb26..337b250f775 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/ReferenceBean.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/ReferenceBean.java
@@ -25,6 +25,7 @@
 import org.apache.dubbo.config.annotation.Reference;
 import org.apache.dubbo.config.spring.extension.SpringExtensionFactory;
 import org.apache.dubbo.config.support.Parameter;
+
 import org.springframework.beans.factory.BeanFactoryUtils;
 import org.springframework.beans.factory.DisposableBean;
 import org.springframework.beans.factory.FactoryBean;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/ServiceBean.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/ServiceBean.java
index 07031f22575..1abd8e1cc4c 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/ServiceBean.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/ServiceBean.java
@@ -25,6 +25,7 @@
 import org.apache.dubbo.config.ServiceConfig;
 import org.apache.dubbo.config.annotation.Service;
 import org.apache.dubbo.config.spring.extension.SpringExtensionFactory;
+
 import org.springframework.aop.support.AopUtils;
 import org.springframework.beans.factory.BeanFactoryUtils;
 import org.springframework.beans.factory.BeanNameAware;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/AbstractAnnotationConfigBeanBuilder.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/AbstractAnnotationConfigBeanBuilder.java
index 431b130e705..eb99855e72b 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/AbstractAnnotationConfigBeanBuilder.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/AbstractAnnotationConfigBeanBuilder.java
@@ -21,6 +21,7 @@
 import org.apache.dubbo.config.ModuleConfig;
 import org.apache.dubbo.config.MonitorConfig;
 import org.apache.dubbo.config.RegistryConfig;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.context.ApplicationContext;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/DubboConfigBindingBeanPostProcessor.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/DubboConfigBindingBeanPostProcessor.java
index 356c476178a..65aadeff359 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/DubboConfigBindingBeanPostProcessor.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/DubboConfigBindingBeanPostProcessor.java
@@ -22,6 +22,7 @@
 import org.apache.dubbo.config.spring.context.annotation.EnableDubboConfigBinding;
 import org.apache.dubbo.config.spring.context.properties.DefaultDubboConfigBinder;
 import org.apache.dubbo.config.spring.context.properties.DubboConfigBinder;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.beans.BeansException;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/ReferenceBeanBuilder.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/ReferenceBeanBuilder.java
index ec3f4e9e7ed..617b5f15ff9 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/ReferenceBeanBuilder.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/ReferenceBeanBuilder.java
@@ -21,6 +21,7 @@
 import org.apache.dubbo.config.spring.ReferenceBean;
 import org.apache.dubbo.config.spring.convert.converter.StringArrayToMapConverter;
 import org.apache.dubbo.config.spring.convert.converter.StringArrayToStringConverter;
+
 import org.springframework.context.ApplicationContext;
 import org.springframework.core.convert.ConversionService;
 import org.springframework.core.convert.support.DefaultConversionService;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/ServiceAnnotationBeanPostProcessor.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/ServiceAnnotationBeanPostProcessor.java
index 0558528f61b..ad4a6c4b888 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/ServiceAnnotationBeanPostProcessor.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/beans/factory/annotation/ServiceAnnotationBeanPostProcessor.java
@@ -21,6 +21,7 @@
 import org.apache.dubbo.config.annotation.Service;
 import org.apache.dubbo.config.spring.ServiceBean;
 import org.apache.dubbo.config.spring.context.annotation.DubboClassPathBeanDefinitionScanner;
+
 import org.springframework.beans.BeansException;
 import org.springframework.beans.MutablePropertyValues;
 import org.springframework.beans.factory.BeanClassLoaderAware;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboComponentScan.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboComponentScan.java
index a947a02be57..82f16ecbb41 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboComponentScan.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboComponentScan.java
@@ -18,6 +18,7 @@
 
 import org.apache.dubbo.config.annotation.Reference;
 import org.apache.dubbo.config.annotation.Service;
+
 import org.springframework.context.annotation.Import;
 
 import java.lang.annotation.Annotation;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboComponentScanRegistrar.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboComponentScanRegistrar.java
index 7fda60f5531..6e14d56247a 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboComponentScanRegistrar.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboComponentScanRegistrar.java
@@ -20,6 +20,7 @@
 import org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.beans.factory.annotation.ServiceAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.util.BeanRegistrar;
+
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.support.AbstractBeanDefinition;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigBindingRegistrar.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigBindingRegistrar.java
index 2440f3446a6..52ab0e67129 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigBindingRegistrar.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigBindingRegistrar.java
@@ -18,6 +18,7 @@
 
 import org.apache.dubbo.config.AbstractConfig;
 import org.apache.dubbo.config.spring.beans.factory.annotation.DubboConfigBindingBeanPostProcessor;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.beans.factory.config.BeanDefinition;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigBindingsRegistrar.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigBindingsRegistrar.java
index 9472c1b76d6..b420fe12ffb 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigBindingsRegistrar.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigBindingsRegistrar.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.config.spring.context.annotation;
 
 import org.apache.dubbo.config.AbstractConfig;
+
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.context.EnvironmentAware;
 import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigConfiguration.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigConfiguration.java
index b3e98a59796..e9f39da986d 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigConfiguration.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigConfiguration.java
@@ -24,6 +24,7 @@
 import org.apache.dubbo.config.ProtocolConfig;
 import org.apache.dubbo.config.ProviderConfig;
 import org.apache.dubbo.config.RegistryConfig;
+
 import org.springframework.context.annotation.Configuration;
 
 /**
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigConfigurationSelector.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigConfigurationSelector.java
index a5e97b26a23..639ad971b4d 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigConfigurationSelector.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/DubboConfigConfigurationSelector.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.config.spring.context.annotation;
 
 import org.apache.dubbo.config.AbstractConfig;
+
 import org.springframework.context.annotation.ImportSelector;
 import org.springframework.core.Ordered;
 import org.springframework.core.annotation.AnnotationAttributes;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubbo.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubbo.java
index 0ce6e27159a..4535f188e4c 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubbo.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubbo.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.config.spring.context.annotation;
 
 import org.apache.dubbo.config.AbstractConfig;
+
 import org.springframework.core.annotation.AliasFor;
 
 import java.lang.annotation.Documented;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubboConfig.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubboConfig.java
index 710ed796a1f..889e39078b0 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubboConfig.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubboConfig.java
@@ -23,6 +23,7 @@
 import org.apache.dubbo.config.ProtocolConfig;
 import org.apache.dubbo.config.ProviderConfig;
 import org.apache.dubbo.config.RegistryConfig;
+
 import org.springframework.context.annotation.Import;
 
 import java.lang.annotation.Documented;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubboConfigBinding.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubboConfigBinding.java
index 7bc7008d6a2..8b50f367286 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubboConfigBinding.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/annotation/EnableDubboConfigBinding.java
@@ -21,6 +21,7 @@
 import org.apache.dubbo.config.ModuleConfig;
 import org.apache.dubbo.config.RegistryConfig;
 import org.apache.dubbo.config.spring.beans.factory.annotation.DubboConfigBindingBeanPostProcessor;
+
 import org.springframework.context.annotation.Import;
 import org.springframework.core.env.PropertySources;
 
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/properties/DefaultDubboConfigBinder.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/properties/DefaultDubboConfigBinder.java
index 670c49e5bc9..e1d44da8f7f 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/properties/DefaultDubboConfigBinder.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/properties/DefaultDubboConfigBinder.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.config.spring.context.properties;
 
 import org.apache.dubbo.config.AbstractConfig;
+
 import org.springframework.beans.MutablePropertyValues;
 import org.springframework.validation.DataBinder;
 
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/properties/DubboConfigBinder.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/properties/DubboConfigBinder.java
index a0052ff95c0..00d713fac61 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/properties/DubboConfigBinder.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/context/properties/DubboConfigBinder.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.config.spring.context.properties;
 
 import org.apache.dubbo.config.AbstractConfig;
+
 import org.springframework.context.EnvironmentAware;
 
 /**
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/convert/converter/StringArrayToMapConverter.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/convert/converter/StringArrayToMapConverter.java
index b7739d11c45..a2e4790919b 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/convert/converter/StringArrayToMapConverter.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/convert/converter/StringArrayToMapConverter.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.config.spring.convert.converter;
 
 import org.apache.dubbo.common.utils.CollectionUtils;
+
 import org.springframework.core.convert.converter.Converter;
 import org.springframework.util.ObjectUtils;
 
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/extension/SpringExtensionFactory.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/extension/SpringExtensionFactory.java
index 988bcecbd1e..99b538c25e0 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/extension/SpringExtensionFactory.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/extension/SpringExtensionFactory.java
@@ -23,6 +23,7 @@
 import org.apache.dubbo.common.utils.ConcurrentHashSet;
 import org.apache.dubbo.config.DubboShutdownHook;
 import org.apache.dubbo.config.spring.util.BeanFactoryUtils;
+
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.NoUniqueBeanDefinitionException;
 import org.springframework.context.ApplicationContext;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/schema/AnnotationBeanDefinitionParser.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/schema/AnnotationBeanDefinitionParser.java
index 833f816cd41..918c916f3c8 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/schema/AnnotationBeanDefinitionParser.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/schema/AnnotationBeanDefinitionParser.java
@@ -20,6 +20,7 @@
 import org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.beans.factory.annotation.ServiceAnnotationBeanPostProcessor;
 import org.apache.dubbo.config.spring.util.BeanRegistrar;
+
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/schema/DubboNamespaceHandler.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/schema/DubboNamespaceHandler.java
index 9f16c39cfae..035c3f925ce 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/schema/DubboNamespaceHandler.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/schema/DubboNamespaceHandler.java
@@ -26,6 +26,7 @@
 import org.apache.dubbo.config.RegistryConfig;
 import org.apache.dubbo.config.spring.ReferenceBean;
 import org.apache.dubbo.config.spring.ServiceBean;
+
 import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
 
 /**
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/status/DataSourceStatusChecker.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/status/DataSourceStatusChecker.java
index 5a934bed1f4..5f268065b43 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/status/DataSourceStatusChecker.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/status/DataSourceStatusChecker.java
@@ -22,6 +22,7 @@
 import org.apache.dubbo.common.status.Status;
 import org.apache.dubbo.common.status.StatusChecker;
 import org.apache.dubbo.config.spring.extension.SpringExtensionFactory;
+
 import org.springframework.context.ApplicationContext;
 
 import javax.sql.DataSource;
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/status/SpringStatusChecker.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/status/SpringStatusChecker.java
index 8f4fb6525be..9a99ec138fd 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/status/SpringStatusChecker.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/status/SpringStatusChecker.java
@@ -22,6 +22,7 @@
 import org.apache.dubbo.common.status.Status;
 import org.apache.dubbo.common.status.StatusChecker;
 import org.apache.dubbo.config.spring.extension.SpringExtensionFactory;
+
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.Lifecycle;
 
diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/BeanFactoryUtils.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/BeanFactoryUtils.java
index e9b170885c3..e519cdee280 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/BeanFactoryUtils.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/BeanFactoryUtils.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.config.spring.util;
 
 import org.apache.dubbo.common.utils.StringUtils;
+
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.ListableBeanFactory;
 import org.springframework.beans.factory.config.ConfigurableBeanFactory;
diff --git a/dubbo-demo/dubbo-demo-consumer/src/main/java/org/apache/dubbo/demo/consumer/Consumer.java b/dubbo-demo/dubbo-demo-consumer/src/main/java/org/apache/dubbo/demo/consumer/Consumer.java
index 8ad330e9783..dd2f5851949 100644
--- a/dubbo-demo/dubbo-demo-consumer/src/main/java/org/apache/dubbo/demo/consumer/Consumer.java
+++ b/dubbo-demo/dubbo-demo-consumer/src/main/java/org/apache/dubbo/demo/consumer/Consumer.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.demo.consumer;
 
 import org.apache.dubbo.demo.DemoService;
+
 import org.springframework.context.support.ClassPathXmlApplicationContext;
 
 public class Consumer {
diff --git a/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/filter/CacheFilter.java b/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/filter/CacheFilter.java
index 62a739d1866..ee6282659aa 100644
--- a/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/filter/CacheFilter.java
+++ b/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/filter/CacheFilter.java
@@ -16,8 +16,6 @@
  */
 package org.apache.dubbo.cache.filter;
 
-import java.io.Serializable;
-
 import org.apache.dubbo.cache.Cache;
 import org.apache.dubbo.cache.CacheFactory;
 import org.apache.dubbo.common.Constants;
@@ -31,6 +29,8 @@
 import org.apache.dubbo.rpc.RpcException;
 import org.apache.dubbo.rpc.RpcResult;
 
+import java.io.Serializable;
+
 /**
  * CacheFilter
  */
diff --git a/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/support/expiring/ExpiringMap.java b/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/support/expiring/ExpiringMap.java
index c3cb373bc0d..381a43ada87 100644
--- a/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/support/expiring/ExpiringMap.java
+++ b/dubbo-filter/dubbo-filter-cache/src/main/java/org/apache/dubbo/cache/support/expiring/ExpiringMap.java
@@ -16,9 +16,9 @@
  */
 package org.apache.dubbo.cache.support.expiring;
 
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
-import java.util.ArrayList;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
diff --git a/dubbo-metrics/dubbo-metrics-api/src/main/java/org/apache/dubbo/metrics/MetricRegistry.java b/dubbo-metrics/dubbo-metrics-api/src/main/java/org/apache/dubbo/metrics/MetricRegistry.java
index abb467a3195..567ee4aa733 100644
--- a/dubbo-metrics/dubbo-metrics-api/src/main/java/org/apache/dubbo/metrics/MetricRegistry.java
+++ b/dubbo-metrics/dubbo-metrics-api/src/main/java/org/apache/dubbo/metrics/MetricRegistry.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.metrics;
 
-
 import java.util.Map;
 import java.util.Set;
 
diff --git a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/Server.java b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/Server.java
index 4051698e061..b39221dcbf8 100644
--- a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/Server.java
+++ b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/Server.java
@@ -19,6 +19,7 @@
 import org.apache.dubbo.common.logger.Logger;
 import org.apache.dubbo.common.logger.LoggerFactory;
 import org.apache.dubbo.qos.server.handler.QosProcessHandler;
+
 import io.netty.bootstrap.ServerBootstrap;
 import io.netty.channel.Channel;
 import io.netty.channel.ChannelInitializer;
diff --git a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/HttpProcessHandler.java b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/HttpProcessHandler.java
index b7fea07aca9..9a36c9758c0 100644
--- a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/HttpProcessHandler.java
+++ b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/HttpProcessHandler.java
@@ -23,6 +23,7 @@
 import org.apache.dubbo.qos.command.DefaultCommandExecutor;
 import org.apache.dubbo.qos.command.NoSuchCommandException;
 import org.apache.dubbo.qos.command.decoder.HttpCommandDecoder;
+
 import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelFutureListener;
 import io.netty.channel.ChannelHandlerContext;
diff --git a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/LocalHostPermitHandler.java b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/LocalHostPermitHandler.java
index 2194b728e06..d93284ae7fb 100644
--- a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/LocalHostPermitHandler.java
+++ b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/LocalHostPermitHandler.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.qos.server.handler;
 
-
 import org.apache.dubbo.qos.common.QosConstants;
 
 import io.netty.buffer.ByteBuf;
diff --git a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/TelnetProcessHandler.java b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/TelnetProcessHandler.java
index f1c02094a11..2faffa04e73 100644
--- a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/TelnetProcessHandler.java
+++ b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/server/handler/TelnetProcessHandler.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.qos.server.handler;
 
-
 import org.apache.dubbo.common.logger.Logger;
 import org.apache.dubbo.common.logger.LoggerFactory;
 import org.apache.dubbo.common.utils.StringUtils;
diff --git a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTable.java b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTable.java
index 74372e5c570..9469f1e6a3a 100644
--- a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTable.java
+++ b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTable.java
@@ -21,13 +21,13 @@
 import java.util.List;
 import java.util.Scanner;
 
+import static java.lang.Math.abs;
+import static java.lang.Math.max;
+import static java.lang.String.format;
 import static org.apache.dubbo.common.utils.StringUtils.EMPTY;
 import static org.apache.dubbo.common.utils.StringUtils.length;
 import static org.apache.dubbo.common.utils.StringUtils.repeat;
 import static org.apache.dubbo.common.utils.StringUtils.replace;
-import static java.lang.Math.abs;
-import static java.lang.Math.max;
-import static java.lang.String.format;
 
 /**
  * Table
diff --git a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTree.java b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTree.java
index 70e14e9588b..351f8764262 100644
--- a/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTree.java
+++ b/dubbo-plugin/dubbo-qos/src/main/java/org/apache/dubbo/qos/textui/TTree.java
@@ -21,10 +21,10 @@
 import java.util.List;
 import java.util.Scanner;
 
+import static java.lang.System.currentTimeMillis;
 import static org.apache.dubbo.common.utils.StringUtils.EMPTY;
 import static org.apache.dubbo.common.utils.StringUtils.length;
 import static org.apache.dubbo.common.utils.StringUtils.repeat;
-import static java.lang.System.currentTimeMillis;
 
 /**
  * tree
diff --git a/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/telnet/support/command/LogTelnetHandler.java b/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/telnet/support/command/LogTelnetHandler.java
index e01aa83af77..121b9d3538e 100644
--- a/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/telnet/support/command/LogTelnetHandler.java
+++ b/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/telnet/support/command/LogTelnetHandler.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.remoting.telnet.support.command;
 
-
 import org.apache.dubbo.common.extension.Activate;
 import org.apache.dubbo.common.logger.Level;
 import org.apache.dubbo.common.logger.LoggerFactory;
diff --git a/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher/ChannelHandlers.java b/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher/ChannelHandlers.java
index d14a1c3d6d0..1ec59617ad2 100644
--- a/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher/ChannelHandlers.java
+++ b/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher/ChannelHandlers.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.remoting.transport.dispatcher;
 
-
 import org.apache.dubbo.common.URL;
 import org.apache.dubbo.common.extension.ExtensionLoader;
 import org.apache.dubbo.remoting.ChannelHandler;
diff --git a/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyBackedChannelBuffer.java b/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyBackedChannelBuffer.java
index 20ac7a143e5..143660a3d93 100644
--- a/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyBackedChannelBuffer.java
+++ b/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyBackedChannelBuffer.java
@@ -20,6 +20,7 @@
 import org.apache.dubbo.remoting.buffer.ChannelBuffer;
 import org.apache.dubbo.remoting.buffer.ChannelBufferFactory;
 import org.apache.dubbo.remoting.buffer.ChannelBuffers;
+
 import io.netty.buffer.ByteBuf;
 
 import java.io.IOException;
diff --git a/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyClientHandler.java b/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyClientHandler.java
index 61086e20e35..2d8981170f3 100644
--- a/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyClientHandler.java
+++ b/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyClientHandler.java
@@ -19,12 +19,12 @@
 import org.apache.dubbo.common.URL;
 import org.apache.dubbo.common.utils.StringUtils;
 import org.apache.dubbo.remoting.ChannelHandler;
+import org.apache.dubbo.remoting.exchange.Request;
+import org.apache.dubbo.remoting.exchange.Response;
 
 import io.netty.channel.ChannelDuplexHandler;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelPromise;
-import org.apache.dubbo.remoting.exchange.Request;
-import org.apache.dubbo.remoting.exchange.Response;
 
 /**
  * NettyClientHandler
diff --git a/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/logging/MessageFormatter.java b/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/logging/MessageFormatter.java
index c8a6c2a3bcd..a138bcf6e60 100644
--- a/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/logging/MessageFormatter.java
+++ b/dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/logging/MessageFormatter.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.remoting.transport.netty4.logging;
 
-
 import java.text.MessageFormat;
 import java.util.HashMap;
 import java.util.Map;
diff --git a/dubbo-remoting/dubbo-remoting-zookeeper/src/main/java/org/apache/dubbo/remoting/zookeeper/zkclient/ZkClientWrapper.java b/dubbo-remoting/dubbo-remoting-zookeeper/src/main/java/org/apache/dubbo/remoting/zookeeper/zkclient/ZkClientWrapper.java
index 17aa372da8d..a22bbe99a13 100644
--- a/dubbo-remoting/dubbo-remoting-zookeeper/src/main/java/org/apache/dubbo/remoting/zookeeper/zkclient/ZkClientWrapper.java
+++ b/dubbo-remoting/dubbo-remoting-zookeeper/src/main/java/org/apache/dubbo/remoting/zookeeper/zkclient/ZkClientWrapper.java
@@ -16,12 +16,13 @@
  */
 package org.apache.dubbo.remoting.zookeeper.zkclient;
 
-import org.I0Itec.zkclient.IZkChildListener;
-import org.I0Itec.zkclient.IZkStateListener;
-import org.I0Itec.zkclient.ZkClient;
 import org.apache.dubbo.common.logger.Logger;
 import org.apache.dubbo.common.logger.LoggerFactory;
 import org.apache.dubbo.common.utils.Assert;
+
+import org.I0Itec.zkclient.IZkChildListener;
+import org.I0Itec.zkclient.IZkStateListener;
+import org.I0Itec.zkclient.ZkClient;
 import org.apache.zookeeper.Watcher.Event.KeeperState;
 
 import java.util.List;
diff --git a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/filter/AccessLogFilter.java b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/filter/AccessLogFilter.java
index 58965e11966..89eb070603d 100644
--- a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/filter/AccessLogFilter.java
+++ b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/filter/AccessLogFilter.java
@@ -18,7 +18,6 @@
 
 import org.apache.dubbo.common.Constants;
 import org.apache.dubbo.common.extension.Activate;
-import com.alibaba.fastjson.JSON;
 import org.apache.dubbo.common.logger.Logger;
 import org.apache.dubbo.common.logger.LoggerFactory;
 import org.apache.dubbo.common.utils.ConcurrentHashSet;
@@ -31,6 +30,8 @@
 import org.apache.dubbo.rpc.RpcContext;
 import org.apache.dubbo.rpc.RpcException;
 
+import com.alibaba.fastjson.JSON;
+
 import java.io.File;
 import java.io.FileWriter;
 import java.text.SimpleDateFormat;
diff --git a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/proxy/AbstractProxyFactory.java b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/proxy/AbstractProxyFactory.java
index bc4a4c9ba71..c46aada701d 100644
--- a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/proxy/AbstractProxyFactory.java
+++ b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/proxy/AbstractProxyFactory.java
@@ -16,8 +16,6 @@
  */
 package org.apache.dubbo.rpc.proxy;
 
-import com.alibaba.dubbo.rpc.service.EchoService;
-
 import org.apache.dubbo.common.Constants;
 import org.apache.dubbo.common.utils.ReflectUtils;
 import org.apache.dubbo.rpc.Invoker;
@@ -25,6 +23,8 @@
 import org.apache.dubbo.rpc.RpcException;
 import org.apache.dubbo.rpc.service.GenericService;
 
+import com.alibaba.dubbo.rpc.service.EchoService;
+
 /**
  * AbstractProxyFactory
  */
diff --git a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/support/MockInvoker.java b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/support/MockInvoker.java
index 9f71c41f5ab..52cc015cc46 100644
--- a/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/support/MockInvoker.java
+++ b/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/support/MockInvoker.java
@@ -30,6 +30,7 @@
 import org.apache.dubbo.rpc.RpcException;
 import org.apache.dubbo.rpc.RpcInvocation;
 import org.apache.dubbo.rpc.RpcResult;
+
 import com.alibaba.fastjson.JSON;
 
 import java.lang.reflect.Constructor;
diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/filter/TraceFilter.java b/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/filter/TraceFilter.java
index 475c3eef2a6..53ae2bd457c 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/filter/TraceFilter.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/filter/TraceFilter.java
@@ -28,6 +28,7 @@
 import org.apache.dubbo.rpc.Result;
 import org.apache.dubbo.rpc.RpcContext;
 import org.apache.dubbo.rpc.RpcException;
+
 import com.alibaba.fastjson.JSON;
 
 import java.util.ArrayList;
diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/InvokeTelnetHandler.java b/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/InvokeTelnetHandler.java
index d149a50e458..82591ab90c1 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/InvokeTelnetHandler.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/InvokeTelnetHandler.java
@@ -28,6 +28,7 @@
 import org.apache.dubbo.rpc.RpcContext;
 import org.apache.dubbo.rpc.RpcInvocation;
 import org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol;
+
 import com.alibaba.fastjson.JSON;
 
 import java.lang.reflect.Method;
diff --git a/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/LogTelnetHandler.java b/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/LogTelnetHandler.java
index ae8ac964f7b..ac2379784c1 100644
--- a/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/LogTelnetHandler.java
+++ b/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/telnet/LogTelnetHandler.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.rpc.protocol.dubbo.telnet;
 
-
 import org.apache.dubbo.common.extension.Activate;
 import org.apache.dubbo.common.logger.Level;
 import org.apache.dubbo.common.logger.LoggerFactory;
diff --git a/dubbo-rpc/dubbo-rpc-hessian/src/main/java/org/apache/dubbo/rpc/protocol/hessian/DubboHessianURLConnectionFactory.java b/dubbo-rpc/dubbo-rpc-hessian/src/main/java/org/apache/dubbo/rpc/protocol/hessian/DubboHessianURLConnectionFactory.java
index 0cce1045f02..21c566fe0fb 100644
--- a/dubbo-rpc/dubbo-rpc-hessian/src/main/java/org/apache/dubbo/rpc/protocol/hessian/DubboHessianURLConnectionFactory.java
+++ b/dubbo-rpc/dubbo-rpc-hessian/src/main/java/org/apache/dubbo/rpc/protocol/hessian/DubboHessianURLConnectionFactory.java
@@ -19,6 +19,7 @@
 
 import org.apache.dubbo.common.Constants;
 import org.apache.dubbo.rpc.RpcContext;
+
 import com.caucho.hessian.client.HessianConnection;
 import com.caucho.hessian.client.HessianURLConnectionFactory;
 
diff --git a/dubbo-rpc/dubbo-rpc-hessian/src/main/java/org/apache/dubbo/rpc/protocol/hessian/HessianProtocol.java b/dubbo-rpc/dubbo-rpc-hessian/src/main/java/org/apache/dubbo/rpc/protocol/hessian/HessianProtocol.java
index 8a7e0e99bb7..3b9239171a9 100644
--- a/dubbo-rpc/dubbo-rpc-hessian/src/main/java/org/apache/dubbo/rpc/protocol/hessian/HessianProtocol.java
+++ b/dubbo-rpc/dubbo-rpc-hessian/src/main/java/org/apache/dubbo/rpc/protocol/hessian/HessianProtocol.java
@@ -24,9 +24,9 @@
 import org.apache.dubbo.rpc.RpcContext;
 import org.apache.dubbo.rpc.RpcException;
 import org.apache.dubbo.rpc.protocol.AbstractProxyProtocol;
-
 import org.apache.dubbo.rpc.service.GenericService;
 import org.apache.dubbo.rpc.support.ProtocolUtils;
+
 import com.caucho.hessian.HessianException;
 import com.caucho.hessian.client.HessianConnectionException;
 import com.caucho.hessian.client.HessianConnectionFactory;
diff --git a/dubbo-rpc/dubbo-rpc-http/src/main/java/org/apache/dubbo/rpc/protocol/http/HttpProtocol.java b/dubbo-rpc/dubbo-rpc-http/src/main/java/org/apache/dubbo/rpc/protocol/http/HttpProtocol.java
index 76130d69eab..ba4bb4f2433 100644
--- a/dubbo-rpc/dubbo-rpc-http/src/main/java/org/apache/dubbo/rpc/protocol/http/HttpProtocol.java
+++ b/dubbo-rpc/dubbo-rpc-http/src/main/java/org/apache/dubbo/rpc/protocol/http/HttpProtocol.java
@@ -26,6 +26,7 @@
 import org.apache.dubbo.rpc.protocol.AbstractProxyProtocol;
 import org.apache.dubbo.rpc.service.GenericService;
 import org.apache.dubbo.rpc.support.ProtocolUtils;
+
 import org.aopalliance.intercept.MethodInvocation;
 import org.springframework.remoting.RemoteAccessException;
 import org.springframework.remoting.httpinvoker.HttpComponentsHttpInvokerRequestExecutor;
diff --git a/dubbo-rpc/dubbo-rpc-http/src/main/java/org/apache/dubbo/rpc/protocol/http/HttpRemoteInvocation.java b/dubbo-rpc/dubbo-rpc-http/src/main/java/org/apache/dubbo/rpc/protocol/http/HttpRemoteInvocation.java
index 77179f24562..c2cf48ac5f0 100644
--- a/dubbo-rpc/dubbo-rpc-http/src/main/java/org/apache/dubbo/rpc/protocol/http/HttpRemoteInvocation.java
+++ b/dubbo-rpc/dubbo-rpc-http/src/main/java/org/apache/dubbo/rpc/protocol/http/HttpRemoteInvocation.java
@@ -20,6 +20,7 @@
 import org.apache.dubbo.common.Constants;
 import org.apache.dubbo.common.utils.StringUtils;
 import org.apache.dubbo.rpc.RpcContext;
+
 import org.aopalliance.intercept.MethodInvocation;
 import org.springframework.remoting.support.RemoteInvocation;
 
diff --git a/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/RpcContextFilter.java b/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/RpcContextFilter.java
index ae9e813ddc2..b99bf1dc4eb 100644
--- a/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/RpcContextFilter.java
+++ b/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/RpcContextFilter.java
@@ -18,6 +18,7 @@
 
 import org.apache.dubbo.common.utils.StringUtils;
 import org.apache.dubbo.rpc.RpcContext;
+
 import org.jboss.resteasy.spi.ResteasyProviderFactory;
 
 import javax.annotation.Priority;
diff --git a/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/integration/swagger/DubboSwaggerApiListingResource.java b/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/integration/swagger/DubboSwaggerApiListingResource.java
index 6fcc8db6205..41b8ff51fd9 100644
--- a/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/integration/swagger/DubboSwaggerApiListingResource.java
+++ b/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/integration/swagger/DubboSwaggerApiListingResource.java
@@ -17,16 +17,17 @@
 package org.apache.dubbo.rpc.protocol.rest.integration.swagger;
 
 import org.apache.dubbo.config.annotation.Service;
+
 import com.fasterxml.jackson.core.JsonProcessingException;
 import io.swagger.jaxrs.listing.BaseApiListingResource;
 
 import javax.servlet.ServletConfig;
 import javax.servlet.ServletContext;
-import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Application;
+import javax.ws.rs.core.Context;
 import javax.ws.rs.core.HttpHeaders;
+import javax.ws.rs.core.Response;
 import javax.ws.rs.core.UriInfo;
-import javax.ws.rs.core.Context;
-import javax.ws.rs.core.Application;
 
 @Service
 public class DubboSwaggerApiListingResource extends BaseApiListingResource implements DubboSwaggerService {
diff --git a/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/integration/swagger/DubboSwaggerService.java b/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/integration/swagger/DubboSwaggerService.java
index bca1b863e7c..3f6d7630baf 100644
--- a/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/integration/swagger/DubboSwaggerService.java
+++ b/dubbo-rpc/dubbo-rpc-rest/src/main/java/org/apache/dubbo/rpc/protocol/rest/integration/swagger/DubboSwaggerService.java
@@ -25,9 +25,9 @@
 import javax.ws.rs.Produces;
 import javax.ws.rs.core.Application;
 import javax.ws.rs.core.Context;
+import javax.ws.rs.core.HttpHeaders;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
-import javax.ws.rs.core.HttpHeaders;
 import javax.ws.rs.core.UriInfo;
 
 
diff --git a/dubbo-rpc/dubbo-rpc-rmi/src/main/java/org/apache/dubbo/rpc/protocol/rmi/RmiRemoteInvocation.java b/dubbo-rpc/dubbo-rpc-rmi/src/main/java/org/apache/dubbo/rpc/protocol/rmi/RmiRemoteInvocation.java
index f85afccf61e..dbbe9d66867 100644
--- a/dubbo-rpc/dubbo-rpc-rmi/src/main/java/org/apache/dubbo/rpc/protocol/rmi/RmiRemoteInvocation.java
+++ b/dubbo-rpc/dubbo-rpc-rmi/src/main/java/org/apache/dubbo/rpc/protocol/rmi/RmiRemoteInvocation.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.rpc.protocol.rmi;
 
 import org.apache.dubbo.rpc.RpcContext;
+
 import org.aopalliance.intercept.MethodInvocation;
 import org.springframework.remoting.support.RemoteInvocation;
 
diff --git a/dubbo-rpc/dubbo-rpc-thrift/src/main/java/org/apache/dubbo/rpc/protocol/thrift/ThriftCodec.java b/dubbo-rpc/dubbo-rpc-thrift/src/main/java/org/apache/dubbo/rpc/protocol/thrift/ThriftCodec.java
index b693847fb18..02c0699af2c 100644
--- a/dubbo-rpc/dubbo-rpc-thrift/src/main/java/org/apache/dubbo/rpc/protocol/thrift/ThriftCodec.java
+++ b/dubbo-rpc/dubbo-rpc-thrift/src/main/java/org/apache/dubbo/rpc/protocol/thrift/ThriftCodec.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.rpc.protocol.thrift;
 
-
 import org.apache.dubbo.common.Constants;
 import org.apache.dubbo.common.extension.ExtensionLoader;
 import org.apache.dubbo.common.utils.ClassHelper;
diff --git a/dubbo-serialization/dubbo-serialization-fastjson/src/main/java/org/apache/dubbo/common/serialize/fastjson/FastJsonObjectOutput.java b/dubbo-serialization/dubbo-serialization-fastjson/src/main/java/org/apache/dubbo/common/serialize/fastjson/FastJsonObjectOutput.java
index 0ec5c010eab..d0e4ed546e9 100644
--- a/dubbo-serialization/dubbo-serialization-fastjson/src/main/java/org/apache/dubbo/common/serialize/fastjson/FastJsonObjectOutput.java
+++ b/dubbo-serialization/dubbo-serialization-fastjson/src/main/java/org/apache/dubbo/common/serialize/fastjson/FastJsonObjectOutput.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.common.serialize.fastjson;
 
 import org.apache.dubbo.common.serialize.ObjectOutput;
+
 import com.alibaba.fastjson.serializer.JSONSerializer;
 import com.alibaba.fastjson.serializer.SerializeWriter;
 import com.alibaba.fastjson.serializer.SerializerFeature;
diff --git a/dubbo-serialization/dubbo-serialization-fst/src/main/java/org/apache/dubbo/common/serialize/fst/FstFactory.java b/dubbo-serialization/dubbo-serialization-fst/src/main/java/org/apache/dubbo/common/serialize/fst/FstFactory.java
index 6329d1ecb7d..b0830332b52 100644
--- a/dubbo-serialization/dubbo-serialization-fst/src/main/java/org/apache/dubbo/common/serialize/fst/FstFactory.java
+++ b/dubbo-serialization/dubbo-serialization-fst/src/main/java/org/apache/dubbo/common/serialize/fst/FstFactory.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.common.serialize.fst;
 
 import org.apache.dubbo.common.serialize.support.SerializableClassRegistry;
+
 import org.nustaq.serialization.FSTConfiguration;
 import org.nustaq.serialization.FSTObjectInput;
 import org.nustaq.serialization.FSTObjectOutput;
diff --git a/dubbo-serialization/dubbo-serialization-hessian2/src/main/java/org/apache/dubbo/common/serialize/hessian2/Hessian2ObjectInput.java b/dubbo-serialization/dubbo-serialization-hessian2/src/main/java/org/apache/dubbo/common/serialize/hessian2/Hessian2ObjectInput.java
index 4ec97a4c705..348d04d9913 100644
--- a/dubbo-serialization/dubbo-serialization-hessian2/src/main/java/org/apache/dubbo/common/serialize/hessian2/Hessian2ObjectInput.java
+++ b/dubbo-serialization/dubbo-serialization-hessian2/src/main/java/org/apache/dubbo/common/serialize/hessian2/Hessian2ObjectInput.java
@@ -16,9 +16,10 @@
  */
 package org.apache.dubbo.common.serialize.hessian2;
 
-import com.alibaba.com.caucho.hessian.io.Hessian2Input;
 import org.apache.dubbo.common.serialize.ObjectInput;
 
+import com.alibaba.com.caucho.hessian.io.Hessian2Input;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.reflect.Type;
diff --git a/dubbo-serialization/dubbo-serialization-hessian2/src/main/java/org/apache/dubbo/common/serialize/hessian2/Hessian2ObjectOutput.java b/dubbo-serialization/dubbo-serialization-hessian2/src/main/java/org/apache/dubbo/common/serialize/hessian2/Hessian2ObjectOutput.java
index 5d640fdc8d9..fec356a668a 100644
--- a/dubbo-serialization/dubbo-serialization-hessian2/src/main/java/org/apache/dubbo/common/serialize/hessian2/Hessian2ObjectOutput.java
+++ b/dubbo-serialization/dubbo-serialization-hessian2/src/main/java/org/apache/dubbo/common/serialize/hessian2/Hessian2ObjectOutput.java
@@ -16,9 +16,10 @@
  */
 package org.apache.dubbo.common.serialize.hessian2;
 
-import com.alibaba.com.caucho.hessian.io.Hessian2Output;
 import org.apache.dubbo.common.serialize.ObjectOutput;
 
+import com.alibaba.com.caucho.hessian.io.Hessian2Output;
+
 import java.io.IOException;
 import java.io.OutputStream;
 
diff --git a/dubbo-serialization/dubbo-serialization-jdk/src/main/java/org/apache/dubbo/common/serialize/java/JavaObjectOutput.java b/dubbo-serialization/dubbo-serialization-jdk/src/main/java/org/apache/dubbo/common/serialize/java/JavaObjectOutput.java
index 44308b48281..49a4b45123f 100644
--- a/dubbo-serialization/dubbo-serialization-jdk/src/main/java/org/apache/dubbo/common/serialize/java/JavaObjectOutput.java
+++ b/dubbo-serialization/dubbo-serialization-jdk/src/main/java/org/apache/dubbo/common/serialize/java/JavaObjectOutput.java
@@ -16,7 +16,6 @@
  */
 package org.apache.dubbo.common.serialize.java;
 
-
 import org.apache.dubbo.common.serialize.nativejava.NativeJavaObjectOutput;
 
 import java.io.IOException;
diff --git a/dubbo-serialization/dubbo-serialization-kryo/src/main/java/org/apache/dubbo/common/serialize/kryo/CompatibleKryo.java b/dubbo-serialization/dubbo-serialization-kryo/src/main/java/org/apache/dubbo/common/serialize/kryo/CompatibleKryo.java
index ba854e5381b..69e4b35b16f 100644
--- a/dubbo-serialization/dubbo-serialization-kryo/src/main/java/org/apache/dubbo/common/serialize/kryo/CompatibleKryo.java
+++ b/dubbo-serialization/dubbo-serialization-kryo/src/main/java/org/apache/dubbo/common/serialize/kryo/CompatibleKryo.java
@@ -16,13 +16,14 @@
  */
 package org.apache.dubbo.common.serialize.kryo;
 
-import com.esotericsoftware.kryo.Kryo;
-import com.esotericsoftware.kryo.Serializer;
-import com.esotericsoftware.kryo.serializers.JavaSerializer;
 import org.apache.dubbo.common.logger.Logger;
 import org.apache.dubbo.common.logger.LoggerFactory;
 import org.apache.dubbo.common.serialize.kryo.utils.ReflectionUtils;
 
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.Serializer;
+import com.esotericsoftware.kryo.serializers.JavaSerializer;
+
 public class CompatibleKryo extends Kryo {
 
     private static final Logger logger = LoggerFactory.getLogger(CompatibleKryo.class);
diff --git a/dubbo-serialization/dubbo-serialization-kryo/src/main/java/org/apache/dubbo/common/serialize/kryo/utils/AbstractKryoFactory.java b/dubbo-serialization/dubbo-serialization-kryo/src/main/java/org/apache/dubbo/common/serialize/kryo/utils/AbstractKryoFactory.java
index 523b59f7b30..541a5e7dd02 100644
--- a/dubbo-serialization/dubbo-serialization-kryo/src/main/java/org/apache/dubbo/common/serialize/kryo/utils/AbstractKryoFactory.java
+++ b/dubbo-serialization/dubbo-serialization-kryo/src/main/java/org/apache/dubbo/common/serialize/kryo/utils/AbstractKryoFactory.java
@@ -16,6 +16,9 @@
  */
 package org.apache.dubbo.common.serialize.kryo.utils;
 
+import org.apache.dubbo.common.serialize.kryo.CompatibleKryo;
+import org.apache.dubbo.common.serialize.support.SerializableClassRegistry;
+
 import com.esotericsoftware.kryo.Kryo;
 import com.esotericsoftware.kryo.Serializer;
 import com.esotericsoftware.kryo.pool.KryoFactory;
@@ -29,8 +32,6 @@
 import de.javakaffee.kryoserializers.URISerializer;
 import de.javakaffee.kryoserializers.UUIDSerializer;
 import de.javakaffee.kryoserializers.UnmodifiableCollectionsSerializer;
-import org.apache.dubbo.common.serialize.kryo.CompatibleKryo;
-import org.apache.dubbo.common.serialize.support.SerializableClassRegistry;
 
 import java.lang.reflect.InvocationHandler;
 import java.math.BigDecimal;
diff --git a/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/ProtostuffObjectInput.java b/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/ProtostuffObjectInput.java
index f98cbd8914d..0202762cfa2 100644
--- a/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/ProtostuffObjectInput.java
+++ b/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/ProtostuffObjectInput.java
@@ -17,11 +17,12 @@
 
 package org.apache.dubbo.common.serialize.protostuff;
 
+import org.apache.dubbo.common.serialize.ObjectInput;
+import org.apache.dubbo.common.serialize.protostuff.utils.WrapperUtils;
+
 import io.protostuff.ProtobufIOUtil;
 import io.protostuff.Schema;
 import io.protostuff.runtime.RuntimeSchema;
-import org.apache.dubbo.common.serialize.ObjectInput;
-import org.apache.dubbo.common.serialize.protostuff.utils.WrapperUtils;
 
 import java.io.DataInputStream;
 import java.io.IOException;
diff --git a/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/ProtostuffObjectOutput.java b/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/ProtostuffObjectOutput.java
index fa34f5e70f1..2e91d17ef6f 100644
--- a/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/ProtostuffObjectOutput.java
+++ b/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/ProtostuffObjectOutput.java
@@ -17,12 +17,13 @@
 
 package org.apache.dubbo.common.serialize.protostuff;
 
+import org.apache.dubbo.common.serialize.ObjectOutput;
+import org.apache.dubbo.common.serialize.protostuff.utils.WrapperUtils;
+
 import io.protostuff.LinkedBuffer;
 import io.protostuff.ProtobufIOUtil;
 import io.protostuff.Schema;
 import io.protostuff.runtime.RuntimeSchema;
-import org.apache.dubbo.common.serialize.ObjectOutput;
-import org.apache.dubbo.common.serialize.protostuff.utils.WrapperUtils;
 
 import java.io.DataOutputStream;
 import java.io.IOException;
diff --git a/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/utils/WrapperUtils.java b/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/utils/WrapperUtils.java
index a44df54fcea..9d8be8b4db8 100644
--- a/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/utils/WrapperUtils.java
+++ b/dubbo-serialization/dubbo-serialization-protostuff/src/main/java/org/apache/dubbo/common/serialize/protostuff/utils/WrapperUtils.java
@@ -17,11 +17,12 @@
 
 package org.apache.dubbo.common.serialize.protostuff.utils;
 
-import io.protostuff.runtime.DefaultIdStrategy;
-import io.protostuff.runtime.RuntimeEnv;
 import org.apache.dubbo.common.serialize.protostuff.Wrapper;
 import org.apache.dubbo.common.serialize.protostuff.delegate.TimeDelegate;
 
+import io.protostuff.runtime.DefaultIdStrategy;
+import io.protostuff.runtime.RuntimeEnv;
+
 import java.math.BigDecimal;
 import java.sql.Time;
 import java.util.ArrayList;
diff --git a/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/Spring3CompatibilityTest.java b/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/Spring3CompatibilityTest.java
index 35928152aa7..752be7fc31b 100644
--- a/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/Spring3CompatibilityTest.java
+++ b/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/Spring3CompatibilityTest.java
@@ -19,6 +19,7 @@
 import org.apache.dubbo.demo.DemoService;
 import org.apache.dubbo.test.consumer.ConsumerConfiguration;
 import org.apache.dubbo.test.provider.ProviderConfiguration;
+
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.util.Assert;
diff --git a/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/consumer/ConsumerConfiguration.java b/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/consumer/ConsumerConfiguration.java
index 074efcc41b0..7026ef33400 100644
--- a/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/consumer/ConsumerConfiguration.java
+++ b/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/consumer/ConsumerConfiguration.java
@@ -19,6 +19,7 @@
 import org.apache.dubbo.config.annotation.Reference;
 import org.apache.dubbo.config.spring.context.annotation.DubboComponentScan;
 import org.apache.dubbo.demo.DemoService;
+
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.ImportResource;
 
diff --git a/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/provider/ProviderConfiguration.java b/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/provider/ProviderConfiguration.java
index b0a7629c151..d959e544516 100644
--- a/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/provider/ProviderConfiguration.java
+++ b/dubbo-test/dubbo-test-compatibility/dubbo-test-spring3/src/main/java/org/apache/dubbo/test/provider/ProviderConfiguration.java
@@ -17,6 +17,7 @@
 package org.apache.dubbo.test.provider;
 
 import org.apache.dubbo.config.spring.context.annotation.DubboComponentScan;
+
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.ImportResource;