perf($Starter): support internationalization (i18n)

auth-center/src/main/java/com/jmsoftware/maf/authcenter/user/service/impl/UserServiceImpl.java

@@ -16,6 +16,8 @@
 import lombok.val;
 import org.springframework.cache.annotation.CacheConfig;
 import org.springframework.cache.annotation.Cacheable;
+import org.springframework.context.MessageSource;
+import org.springframework.context.i18n.LocaleContextHolder;
 import org.springframework.http.HttpStatus;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.stereotype.Service;
@@ -40,16 +42,17 @@
 public class UserServiceImpl extends ServiceImpl<UserMapper, UserPersistence> implements UserService {
     private final BCryptPasswordEncoder bCryptPasswordEncoder;
     private final JwtService jwtService;
+    private final MessageSource messageSource;
 
     @Override
     @Cacheable
     public GetUserByLoginTokenResponse getUserByLoginToken(@NotBlank String loginToken) {
         LambdaQueryWrapper<UserPersistence> wrapper = Wrappers.lambdaQuery();
         wrapper.and(queryWrapper -> queryWrapper.eq(UserPersistence::getUsername, loginToken)
-                        .or()
-                        .eq(UserPersistence::getEmail, loginToken)
-                        .or()
-                        .eq(UserPersistence::getCellphone, loginToken));
+                .or()
+                .eq(UserPersistence::getEmail, loginToken)
+                .or()
+                .eq(UserPersistence::getCellphone, loginToken));
         val userPersistence = this.getBaseMapper().selectOne(wrapper);
         if (ObjectUtil.isNull(userPersistence)) {
             return null;
@@ -87,6 +90,7 @@ public LoginResponse login(@Valid LoginPayload payload) throws SecurityException
         if (matched) {
             String jwt = jwtService.createJwt(payload.getRememberMe(), user.getId(), user.getUsername(), null, null);
             val response = new LoginResponse();
+            response.setGreeting(messageSource.getMessage(("greeting"), null, LocaleContextHolder.getLocale()));
             response.setJwt(jwt);
             return response;
         }

auth-center/src/main/resources/messages.properties

@@ -0,0 +1 @@
+greeting=Hello!

auth-center/src/main/resources/messages_zh_CN.properties

@@ -0,0 +1 @@
+greeting=你好！

common/src/main/java/com/jmsoftware/maf/common/domain/authcenter/user/LoginResponse.java

@@ -9,5 +9,6 @@
  **/
 @Data
 public class LoginResponse {
+    private String greeting;
     private String jwt;
 }

spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/MafAutoConfiguration.java

@@ -48,6 +48,7 @@
 @ConditionalOnWebApplication
 @EnableConfigurationProperties({MafConfiguration.class, MafProjectProperty.class})
 @Import({
+        WebMvcConfiguration.class,
         MyBatisPlusConfiguration.class,
         RedisConfiguration.class,
         Swagger2Configuration.class,
@@ -104,13 +105,6 @@ public SpringBootStartupHelper springBootStartupHelper(MafProjectProperty mafPro
         return new SpringBootStartupHelper(mafProjectProperty, ipHelper);
     }
 
-    @Bean
-    @ConditionalOnMissingBean
-    public WebMvcConfiguration webMvcConfiguration() {
-        log.warn("Initial bean: '{}'", WebMvcConfiguration.class.getSimpleName());
-        return new WebMvcConfiguration();
-    }
-
     @Bean
     @ConditionalOnMissingBean(value = ErrorController.class, search = SearchStrategy.CURRENT)
     public GlobalErrorController globalErrorController(ErrorAttributes errorAttributes,

spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/configuration/JwtConfiguration.java

@@ -13,6 +13,8 @@
  * <p>
  * Ignored request configuration.
  *
+ * TODO: make prefix under "maf."
+ *
  * @author Johnny Miller (锺俊), email: johnnysviva@outlook.com
  * @date 5/2/20 11:41 PM
  **/

spring-cloud-starter/src/main/java/com/jmsoftware/maf/springcloudstarter/configuration/WebMvcConfiguration.java

@@ -1,9 +1,11 @@
 package com.jmsoftware.maf.springcloudstarter.configuration;
 
-import lombok.RequiredArgsConstructor;
+import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
 
 /**
  * <h1>WebMvcConfiguration</h1>
@@ -14,12 +16,15 @@
  * @date 1/23/20 9:02 AM
  **/
 @Configuration
-@RequiredArgsConstructor
 public class WebMvcConfiguration implements WebMvcConfigurer {
     /**
      * Max age: 3600 seconds (1 hour)
      */
     private static final long MAX_AGE_SECS = 3600;
+    /**
+     * Default name of the locale specification parameter: "lang".
+     */
+    private static final String DEFAULT_PARAM_NAME = "lang";
 
     /**
      * Configure cross origin requests processing.
@@ -33,4 +38,25 @@ public void addCorsMappings(CorsRegistry registry) {
                 .allowedMethods("HEAD", "OPTIONS", "GET", "POST", "PUT", "PATCH", "DELETE")
                 .maxAge(MAX_AGE_SECS);
     }
+
+    /**
+     * An interceptor bean that will switch to a new locale based on the value of the lang parameter appended to a
+     * request.
+     *
+     * @return the locale change interceptor
+     * @see
+     * <a href='https://www.baeldung.com/spring-boot-internationalization#localechangeinterceptor'>LocaleChangeInterceptor</a>
+     */
+    @Bean
+    public LocaleChangeInterceptor localeChangeInterceptor() {
+        LocaleChangeInterceptor localeChangeInterceptor = new LocaleChangeInterceptor();
+        localeChangeInterceptor.setParamName(DEFAULT_PARAM_NAME);
+        return localeChangeInterceptor;
+    }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        // In order to take effect, this bean needs to be added to the application's interceptor registry.
+        registry.addInterceptor(localeChangeInterceptor());
+    }
 }