CREATE TABLE `student` (`id` int(11) NOT NULL COMMENT '学生id',`name` varchar(255) NOT NULL COMMENT '学生姓名',`gender` tinyint(2) DEFAULT NULL COMMENT '学生性别，1男生，0女生',`create_time` datetime DEFAULT NULL COMMENT '创建时间',PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;insert into student (id, name, gender) values (1, '张三', 1);
insert into student (id, name, gender) values (2, '李四', 1);
insert into student (id, name, gender) values (3, '王五', 1);
insert into student (id, name, gender) values (4, '赵六', 1);

<build><plugins><plugin><groupId>org.mybatis.generator</groupId><artifactId>mybatis-generator-maven-plugin</artifactId><version>1.3.7</version><configuration><verbose>true</verbose><overwrite>true</overwrite></configuration></plugin></plugins>
</build>

@Repository
public interface StudentMapper {// 生成的一部分，没有全部列出来long countByExample(StudentExample example);int deleteByExample(StudentExample example);int deleteByPrimaryKey(Integer id);int insert(Student record);int insertSelective(Student record);
}

@RunWith(SpringRunner.class)
@SpringBootTest
public class StudentMapperTest {@AutowiredStudentMapper studentMapper;@Testpublic void countByExample() throws Exception {StudentExample example = new StudentExample();StudentExample.Criteria criteria = example.createCriteria();// id >= 1criteria.andIdGreaterThanOrEqualTo(1);// id < 4criteria.andIdLessThan(4);assertEquals(3, studentMapper.countByExample(example));}
}

<table tableName="student" enableCountByExample="false" enableUpdateByExample="false">
</table>

public interface StudentMapper {int deleteByPrimaryKey(Integer id);int insert(Student record);int insertSelective(Student record);Student selectByPrimaryKey(Integer id);int updateByPrimaryKeySelective(Student record);int updateByPrimaryKey(Student record);
}

public class Student {private Integer id;private String name;private Byte gender;private LocalDateTime createTime;
}

<javaTypeResolver><property name="useJSR310Types" value="true"/>
</javaTypeResolver>

<table tableName="student" domainObjectName="Student"><columnOverride column="create_time" javaType="java.time.LocalDateTime"/>
</table>

<javaTypeResolver><property name="useJSR310Types" value="true"/>
</javaTypeResolver>