mybatis-plus使用枚举

定义枚举类

@Getter
public enum SexEnum {
    MALE(1,"男"), FEMALE(2, "女") ;

    @EnumValue//表示会把这个值存入数据库
    private int index;
    @JsonValue//json序列化时使用这个属性
    private String name;
    SexEnum(int i, String name) {
        this.index = i;
        this.name = name;
    }
}

实体类

@TableName("mytest")
@Data
public class MyTest {

    @TableId(type = IdType.AUTO)
    private Long id;

    /**
     * 使用mybatisPlus的EnumValue注解后就可以把这个定义为枚举类型
     */
    private SexEnum sex;

    public MyTest() {
    }

    public MyTest(Long id, SexEnum sex) {
        this.id = id;
        this.sex = sex;
    }
}

测试

@Test
void test2() throws JsonProcessingException {
    MyTest myTest = new MyTest(null, SexEnum.MALE);
    int insert = myTestMapper.insert(myTest);
    /**
    ==>  Preparing: INSERT INTO mytest ( sex ) VALUES ( ? )
	==> Parameters: 1(Integer)
	*/
    MyTest myTest1 = myTestMapper.selectById(myTest.getId());
    System.out.println(myTest1);//MyTest(id=12, sex=MALE)
    String string = new ObjectMapper().writeValueAsString(myTest1);
    System.out.println(string);//{"id":12,"sex":"男"}
}