springmvc 序列化枚举类

Posted 2022-02-24 QQ_851228082

springmvc中，经常用到枚举类转json。
比如一个枚举类

public enum MyEnum
  INSTANCE1("code1","name1"),
    INSTANCE2("code2","name2"),
    ;
	private String code;
    private String name;
	MyEnum(String code, String name) 
        this.code = code;
        this.name = name;
    
    //getter and setter

springmvc json转换器默认使用jackson，序列化的结果是

["INSTANCE1","INSTANCE2"]

但一般期望序列化后结果是

["code":"code1","name":"name1","code":"code2","name":"name2"]

使用jackson2注解，类上添加注解JsonFormat，设置shape

import com.fasterxml.jackson.annotation.JsonFormat;
@JsonFormat(shape = JsonFormat.Shape.OBJECT)
public enum MyEnum 

@RequestMapping("list")
  public MyEnum[] myEnums()
      return MyEnum.values();
  

序列化后

["code":"code1","name":"name1","code":"code2","name":"name2"]

fastjson序列化枚举类

首先在类上添加serializeEnumAsJavaBean

import com.alibaba.fastjson.annotation.JSONType;
@JSONType(serializeEnumAsJavaBean = true)
public enum MyEnum

使用toJSONString方法

JSONObject.toJSONString(MyEnum.values())