MyBatis分页的实现

MyBatis实现分页

• 通过在映射文件中传入Map类实现

  • Mapper映射文件

    <!-- 查询所有用户 -->
    <select id="selectAll" parameterType="Map" resultType="User">
        select * from user limit #{startIndex}, #{pageSize}
    </select>

  • Dao对象

    //分页查询
    public List<User> getAll(int currentPage, int pageSize) throws IOException {
        SqlSession session = MyBatisUtil.getSession();
        Map<String, Integer> map = new HashMap<String, Integer> ();
        map.put("startIndex", (currentPage - 1) * pageSize);
        map.put("pageSize", pageSize);
    
        List<User> list = session.selectList("com.eric.entity.UserMapper.selectAll", map);
        session.close();
        return list;
    }

• 通过RowBounds实现

  • Mapper文件不需要改变
  • Dao需要新建RowBounds对象: RowBounds(startIndex, pageSize)
    

    public List<User> getAll(int currentPage, int pageSize) throws IOException {
        SqlSession session = MyBatisUtil.getSession();
        RowBounds rowBounds = new RowBounds((currentPage - 1) * pageSize, pageSize);
        List<User> list = session.selectList("com.eric.entity.UserMapper.getAll", null, rowBounds);
        session.close();
        return list;
    }