Mybatis-Plus实践学习（二十三）

1.6、删除操作

代码语言：javascript复制

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserMapperTest {
@Autowired
private UserMapper userMapper;
@Test
public void testAR() {
User user = new User();
user.setId(7L);
boolean delete = user.deleteById();
System.out.println(delete);
}
}

结果：

代码语言：javascript复制

[main] [cn.itcast.mp.mapper.UserMapper.deleteById]-[DEBUG] ==> Preparing: DELETE FROM
tb_user WHERE id=?
[main] [cn.itcast.mp.mapper.UserMapper.deleteById]-[DEBUG] ==> Parameters: 7(Long)
[main] [cn.itcast.mp.mapper.UserMapper.deleteById]-[DEBUG] <== Updates: 1

1.7、根据条件查询

代码语言：javascript复制

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserMapperTest {   
@Autowired
private UserMapper userMapper;
@Test
public void testAR() {
User user = new User();
QueryWrapper<User> userQueryWrapper = new QueryWrapper<>();
userQueryWrapper.le("age","20");
List<User> users = user.selectList(userQueryWrapper);
for (User user1 : users) {
System.out.println(user1);
}
}
}

结果：

代码语言：javascript复制

[main] [cn.itcast.mp.mapper.UserMapper.selectList]-[DEBUG] ==> Preparing: SELECT
id,user_name,password,name,age,email FROM tb_user WHERE age <= ?
[main] [cn.itcast.mp.mapper.UserMapper.selectList]-[DEBUG] ==> Parameters: 20(String)
[main] [cn.itcast.mp.mapper.UserMapper.selectList]-[DEBUG] <== Total: 2
User(id=2, userName=lisi, password=123456, name=李四, age=20, email=test2@itcast.cn,
address=null)
User(id=6, userName=caocao, password=123456, name=曹操, age=20, email=test@itcast.cn,
address=null)

public 实践 mybatis class debug

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