fastjson2 枚举转换

可以用ValueFilter，比如

import com.alibaba.fastjson2.filter.ValueFilter;

@Test public void test() { Bean bean = new Bean(); bean.type = Type.Big;

ValueFilter valueFilter = (Object object, String name, Object value) -> {
    if (value instanceof Type) {
        switch ((Type) value) {
            case Big:
                return "大";
            case Small:
                return "小";
            default:
                break;
        }
    }
    return value;
};
String json = JSON.toJSONString(bean, valueFilter);
assertEquals("{\"type\":\"大\"}", json);

}

public enum Type { Big(101), Small(102);

public final int code;

Type(int code) {
    this.code = code;
}

}

public static class Bean { public Type type; }

原回答者GitHub用户wenshao