查询专栏：MP默认查询原则
查询的是数据库列名非实体类属性
文章目录
- AR 模式
- 1. 实体类对象继承Model
- 2. 接口服务类继承baseMapper接口
- 3. 测试AR
AR 模式
1. 实体类对象继承Model
@EqualsAndHashCode(callSuper = false)
@Data
public class User extends Model<User> {// 主键private Long id;//姓名@TableField(condition = SqlCondition.LIKE)private String name;//年龄@TableField(condition ="%s<#{%s}")private Integer age;//邮箱private String email;// 上级idprivate Long manager_id;//创建时间private LocalDateTime createTime;
}2. 接口服务类继承baseMapper接口
public interface UserMapper extends BaseMapper<User> {}
3. 测试AR
@Component
public class UserMapperARTest extends MybatisPlusSamplesChapter1ApplicationTests {@Testpublic void insertAR(){User user = new User();user.setName("刘华");user.setAge(20);user.setEmail("test@gblfy.com");user.setManager_id(1111L);user.setCreateTime(LocalDateTime.now());boolean insert = user.insert();System.out.println(insert);}@Testpublic void selectByIdAR(){User user = new User();User user1 = user.selectById(111L);System.out.println(user == user1);System.out.println(user1);}@Testpublic void selectByIdAR2(){User user = new User();user.setId(11L);User user1 = user.selectById();System.out.println(user == user1);System.out.println(user1);}@Testpublic void updateByIdAR(){User user = new User();user.setId(11L);user.setName("你的纳斯达克");boolean user1 = user.updateById();System.out.println(user1);}@Testpublic void delByIdAR(){User user = new User();user.setId(11L);boolean user1 = user.deleteById();System.out.println(user1);}
}
特点:直接操纵数据库
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