看一眼就会用 其余不管

SqlSession sqlSession = null;
 Page<Student> page = null;
 try {
     sqlSession = MybatisDemo.getSqlSession();
     PageHelper.startPage(Integer.parseInt(currentPage),Integer.parseInt(size));

     StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);

      page = mapper.findByPage();
     return page;
 } catch (IOException e) {
     e.printStackTrace();
 }
return page;