使用fastjson1.2.21时，在反序列化泛型对象类型时会报NullPointerException的错误

[Viyond]

环境说明：
jdk：1.8
fastjson：1.2.21

能够重现的case程序如下：

序列化执行类

public class JsonSerializer {
    private static final String NAMESPACE = "teslaSpace";
    private static final Charset CHARSET = Charset.forName("UTF-8");

    public static <T> void serialize(T obj, OutputStream out) {
        setTeslaJson();
        JSONWriter writer = null;
        try {
            writer = new JSONWriter(new OutputStreamWriter(out, CHARSET.newEncoder().onMalformedInput(CodingErrorAction.IGNORE)));
            writer.config(SerializerFeature.QuoteFieldNames, true);
            writer.config(SerializerFeature.SkipTransientField, true);
            writer.config(SerializerFeature.SortField, true);
            writer.config(SerializerFeature.WriteEnumUsingToString, false);
            writer.config(SerializerFeature.WriteClassName, true);
            writer.config(SerializerFeature.DisableCircularReferenceDetect, true);
            writer.writeObject(obj);
            writer.flush();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (writer != null) {
                try {
                    writer.close();
                } catch (Exception e) {
                }
            }
        }
    }

    public static <T> T deserialize(byte[] in) {
        setTeslaJson();
        return (T) JSON.parse(in, 0, in.length, CHARSET.newDecoder(), Feature.AllowArbitraryCommas,
                Feature.IgnoreNotMatch, Feature.SortFeidFastMatch, Feature.DisableCircularReferenceDetect,
                Feature.AutoCloseSource);
    }


    private static void setTeslaJson() {
        if (!JSON.DEFAULT_TYPE_KEY.equals(NAMESPACE)) {
            JSON.setDefaultTypeKey(NAMESPACE);
        }
        if (!SerializeConfig.globalInstance.getTypeKey().equals(NAMESPACE)){
            SerializeConfig.globalInstance.setTypeKey(NAMESPACE);
        }
    }

}

### 对象类如下：
public class Person {
    private String name;
    private Integer age;

    public Person(){}

    public Person(String name, Integer age){
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

public class Result<<TYPE>> {//假设泛型类型为TYPE, github页面样式错误，不能显示出
    private TYPE data;

    public Result(){}

    public TYPE getData() {
        return data;
    }

    public void setData(TYPE data) {
        this.data = data;
    }
}

public class ApiResponse<<TYPE>> {//假设泛型类型为TYPE, github页面样式错误，不能显示出
    private Result<<TYPE>> result; //假设泛型类型为TYPE, github页面样式错误，不能显示出

    public ApiResponse(){}

    public Result<TYPE> getResult() {
        return result;
    }

    public void setResult(Result<TYPE> result) {
        this.result = result;
    }
}

### 测试类如下：
public class JsonSerialTest {

    public static void main(String[] args) {
        try{
            Person person = new Person("test1", 10);
            serialTest(person);

            ApiResponse<Object> apiResponse = new ApiResponse<Object>();
            Result<Object> result = new Result<Object>();
            result.setData(new Object());
            apiResponse.setResult(result);

            serialTest(apiResponse);

        }catch (Throwable e){
            e.printStackTrace();
        }
    }

    private static void serialTest(Object object){
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try{
            JsonSerializer.serialize(object, bos);

            Object desRes = JsonSerializer.deserialize(bos.toByteArray());
            System.out.println("反序列化的结果为:" + desRes);
        }finally {
            try{
                bos.close();
            }catch (IOException e){
            }
        }
    }
}

程序输出结果如下：

反序列化的结果为:Person{name='test1', age=10}
java.lang.NullPointerException
at com.alibaba.fastjson.parser.deserializer.DefaultFieldDeserializer.parseField(DefaultFieldDeserializer.java:51)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.parseField(JavaBeanDeserializer.java:689)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:570)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:189)
at com.alibaba.fastjson.parser.deserializer.DefaultFieldDeserializer.parseField(DefaultFieldDeserializer.java:60)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:549)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:189)
at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:185)
at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:355)
at com.alibaba.fastjson.parser.DefaultJSONParser.parse(DefaultJSONParser.java:1309)
at com.alibaba.fastjson.parser.DefaultJSONParser.parse(DefaultJSONParser.java:1275)
at com.alibaba.fastjson.JSON.parse(JSON.java:178)
at com.alibaba.fastjson.JSON.parse(JSON.java:162)
at tesla.client.test.json.JsonSerializer.deserialize(JsonSerializer.java:49)
at tesla.client.test.json.JsonSerialTest.serialTest(JsonSerialTest.java:34)
at tesla.client.test.json.JsonSerialTest.main(JsonSerialTest.java:22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

请@wenshao 帮忙查看，非常感谢！！

[orika]

DING

[wenshao]

问题已经修复，请使用1.2.22版本