如何将枚举值附加到 object，而不是枚举名称？

Question

So my title is probably not the best one, but I think I can better show it in code what I want to achieve. I'm doing things with Spring Boot, JPA and React.

So let's say I have this enum:

public enum MyEnum {
  FIRST_ENUM("First"),
  SECOND_ENUM("Second")
}

And there's a class that contains one of the enums:

public class MyClass {
  private int id;
  private MyEnum myEnum;
}

When I convert an instance of this class to JSON (so I can pass it to React as JSON), this is what I get:

{
  "id": 1,
  "myEnum": "FIRST_ENUM"
}

But instead I want it to use the value instead (I know I can manually create JSONObject instances, but is there a way to automatically use the value instead?):

{
  "id": 1,
  "myEnum": "First"
}

Answer 1

public enum MyEnum {
    FIRST_ENUM("First"),
    SECOND_ENUM("Second");

    @JsonValue
    private final String name;

    MyEnum(String name) {
        this.name = name;
    }

    @JsonCreator
    public static MyEnum fromString(String string) {
        ...//find enum constant by name
    }
}

Answer 2

Another option is to use @JsonProperty for the enum values if the purpose of the custom name is to represent the enum's value in JSON:

public enum MyEnum {
    @JsonProperty("First")  FIRST_ENUM,
    @JsonProperty("Second") SECOND_ENUM;
}