Jackson 枚举序列化/反序列化

枚举类：

import com.fasterxml.jackson.annotation.JsonCreator; import com.fasterxml.jackson.annotation.JsonValue;  /**  * Created by Administrator on 2017/1/9.  */ public enum TestEnum {      A(1,"1"),     B(2,"2");      private int code;     private String description;      private TestEnum(int code, String description){         this.code = code;         this.description = description;     }      @JsonCreator     public static TestEnum getItem(int code){         for(TestEnum item : values()){             if(item.getCode() == code){                 return item;             }         }         return null;     }      @JsonValue     public int getCode() {         return code;     }      public void setCode(int code) {         this.code = code;     }      public String getDescription() {         return description;     }      public void setDescription(String description) {         this.description = description;     } } 

实例类：

public static class TestEnums{         int code =1;         TestEnum testEnum = TestEnum.B;          public int getCode() {             return code;         }          public void setCode(int code) {             this.code = code;         }          public TestEnum getTestEnum() {             return testEnum;         }          public void setTestEnum(TestEnum testEnum) {             this.testEnum = testEnum;         }     }

方案：

利用 @JsonCreator 与  @JsonValue 注解：

JsonCreator ：反序列化时的 初始化函数，入参为 对应该枚举的 json值

JsonVale：序列化时 枚举对应生成的值

测试类：

@org.junit.Test     public void enumJsonTest(){         TestEnums testEnums = new TestEnums();         String json = JsonUtil.toJson(testEnums);          System.out.println(json);          TestEnums target = JsonUtil.toObject(json,TestEnums.class);         System.out.println("");     }

输出：

{"code":1,"testEnum":2}