Mybatis-分页

为什么要分页？

• 减少数据的处理

使用Limit分页

• 语法

select * from mybatis.student limit startIndex,pageSize

select * from mybatis.student limit 3
//查询0-3号的记录

使用Mybatis实现分页

• 接口

List<User> getuserbylimit(Map<String,Integer> map);

• 接口实现类（mapper.xml）

<select id="getuserbylimit" parameterType="map"  resultMap="userMap">
        select * from mybatis.student limit #{startindex},#{pagesize}
    select>

• 测试

    @Test
    public void testgetuserbylimit(){
     
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UserDao mapper = sqlSession.getMapper(UserDao.class);
        HashMap<String, Integer> map = new HashMap<>();
        map.put("startindex",0);
        map.put("pagesize",2);
        List<User> userList = mapper.getuserbylimit(map);
        for (User user : userList) {
     
            System.out.println(user);
        }
        sqlSession.close();
    }

使用RowBounds实现分页

• 接口

//使用RowBounds
    List<User> getuserbyrowbounds();

• mapper.xml

<select id="getuserbyrowbounds"  resultMap="userMap">
        select * from mybatis.student
    </select>

• 测试类

    @Test
    public void testgetuserbyrowbounds(){
     
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        RowBounds rowBounds = new RowBounds(1,2);
        List<User> userList = sqlSession.selectList("com.qk.dao.UserDao.getuserbyrowbounds",null,rowBounds);
        for (User user : userList) {
     
            System.out.println(user);
        }
        sqlSession.close();
    }

分页插件实现分页

链接: 官网.