mybatis分页查询(limit分页、RowBounds分页)
作者:互联网
1、limit分页
(1)mapper接口:
List<Student> getStudentByLim(HashMap<String, Integer> map);
(2)配置文件:
<select id="getStudentByLim" resultType="pers.zhb.pojo.Student" parameterType="map"> select * from student limit #{startIndex},#{pageSize} </select>
(3)测试:
@Test public void getStudentByLimTest(){ SqlSession sqlSession= MybatisUtils.getSqlSession(); StudentMapper studentMapper=sqlSession.getMapper(StudentMapper.class); HashMap<String,Integer> map=new HashMap<String, Integer>(); map.put("startIndex",0); map.put("pageSize",3); List<Student> students= studentMapper.getStudentByLim(map); for(Student student:students){ System.out.println(student); } }
DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter. DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - Opening JDBC Connection DEBUG [main] - Created connection 1728790703. DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@670b40af] DEBUG [main] - ==> Preparing: select * from student limit ?,? DEBUG [main] - ==> Parameters: 0(Integer), 3(Integer) DEBUG [main] - <== Total: 3 Student{studentno='201811', sname='zhai', sex='男', birthday='1998-11-11', classno='80501', point='890', phone='1234567890', email='null', clas=null} Student{studentno='201812', sname='zhai2', sex='男', birthday='1998-11-11', classno='80601', point='893', phone='19837372533', email='null', clas=null} Student{studentno='201813', sname='zhai3', sex='男', birthday='1998-11-11', classno='80501', point='892', phone='19837372534', email='null', clas=null}
2、RowBounds分页(了解,不建议使用)
(1)接口:
List<Student> getStudentByRowBounds();
(2)配置文件:
<select id="getStudentByRowBounds" resultType="pers.zhb.pojo.Student"> select * from student </select>
(3)测试:
@Test public void getStudentByRowBoundsTest(){ SqlSession sqlSession= MybatisUtils.getSqlSession(); RowBounds rowBounds=new RowBounds(1,2); List<Student> students=sqlSession.selectList ("pers.zhb.mapper.StudentMapper.getStudentByRowBounds",null,rowBounds); for (Student student : students) { System.out.println(student); } sqlSession.close(); }
DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter. DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - PooledDataSource forcefully closed/removed all connections. DEBUG [main] - Opening JDBC Connection DEBUG [main] - Created connection 243745864. DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@e874448] DEBUG [main] - ==> Preparing: select * from student DEBUG [main] - ==> Parameters: Student{studentno='201812', sname='zhai2', sex='男', birthday='1998-11-11', classno='80601', point='893', phone='19837372533', email='null', clas=null} Student{studentno='201813', sname='zhai3', sex='男', birthday='1998-11-11', classno='80501', point='892', phone='19837372534', email='null', clas=null} DEBUG [main] - Resetting autocommit to true on JDBC Connection [com.mysql.jdbc.JDBC4Connection@e874448] DEBUG [main] - Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@e874448] DEBUG [main] - Returned connection 243745864 to pool.
使用RowBounds实现的分页是基于代码的,二limit实现的分页是基于sql的
3、分页插件
官网含有该插件的文档,里面有详细的步骤
摘自:https://pagehelper.github.io/docs/
标签:removed,分页,forcefully,connections,DEBUG,limit,closed,mybatis,main 来源: https://www.cnblogs.com/zhai1997/p/12779074.html