MyBatisPlus - 6, general enumeration

content

1. Add fields to the data table

2. Create a generic enumeration type

3. Add corresponding attributes to the entity class

4. Configure the package where the scan general enumeration is located

5. Test

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Some field values ​​in the table are fixed, such as gender (male or female), at this time we can use the general enumeration of MyBatis-Plus to achieve

1. Add fields to the data table

2. Create a generic enumeration type

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

    @EnumValue  // 将注解所标识的属性的值存储到数据库中
    private Integer sex;

    private String sexName;

    SexEnum(Integer sex, String sexName) {
        this.sex = sex;
        this.sexName = sexName;
    }
}

3. Add corresponding attributes to the entity class

@Data
@AllArgsConstructor
@NoArgsConstructor
//@TableName("t_user")  // 设置该实体类所对应的表的表明
public class User {
    // 将属性对应的字段设定为主键
    // value属性用于指定主键的字段
    // type属性用于设置主键的生成策略
    @TableId(value = "uid", type = IdType.AUTO)
    private Long id;

    // 设置属性所对应的字段名
    @TableField("user_name")
    private String name;

    private Integer age;

    private String email;

    private SexEnum sex;

    @TableLogic
    private Integer isDeleted;
}

4. Configure the package where the scan general enumeration is located

Configure the package where the scan generic enumeration is located in application.yml

mybatis-plus:
  type-enums-package: com.zyj.mybatisplus.enums  # 配置扫描通用枚举所在的包

5. Test

testing method:

@SpringBootTest
public class MyBatisPlusEnumTest {

    @Autowired
    UserMapper userMapper;

    @Test
    public void test(){
        User user = new User();
        user.setName("admin");
        user.setAge(33);
        user.setSex(SexEnum.MALE);
        int ret = userMapper.insert(user);
        System.out.println("ret = " + ret);
    }

}

Output result:

==>  Preparing: INSERT INTO t_user ( user_name, age, sex ) VALUES ( ?, ?, ? )
==> Parameters: admin(String), 33(Integer), 1(Integer)
<==    Updates: 1
Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@15dc339f]
ret = 1