/** 查询学生信息分页 */
  @Override
  public PageResponse<StudentManagerDTO> queryStudentPage(StudentPageRequest studentPageRequest) {
    String schoolId = studentPageRequest.getSchoolId();
    if (schoolId == null) {
      schoolId = userService.getSchoolId(studentPageRequest.getUserId());
      studentPageRequest.setSchoolId(schoolId);
    }
    // 获取学生信息的总条数
    MStudentManager studentManager = new MStudentManager();
    BeanUtils.copyProperties(studentPageRequest, studentManager);
    long count = studentMapper.selectCount(studentManager);
    // 获取当前页的信息
    Page page = PageUtils.buildPage(studentPageRequest);
    List<MStudentManager> mStudentList =
        studentMapper.selectMStudentManagerPage(page, studentManager);
    /*
    给返回接口赋值
     */
    List<StudentManagerDTO> studentManagerDTOs = new ArrayList<>();
    for (MStudentManager mstudents : mStudentList) {
      StudentManagerDTO studentManagerDTO = new StudentManagerDTO();
      BeanUtils.copyProperties(mstudents, studentManagerDTO);
      studentManagerDTO.setLastLoginDate(
          mstudents.getLastLoginDate() == null
              ? "从未登录"
              : DateFormatUtils.format(mstudents.getLastLoginDate(), "yyyy-MM-dd HH:mm"));
      if (mstudents.getYears() != null) {
        studentManagerDTO.setClassAliasName(
            getGrade(mstudents.getYears()) + studentManagerDTO.getClassAliasName());
      } else {
        studentManagerDTO.setClassAliasName("无班级");
      }
      studentManagerDTOs.add(studentManagerDTO);
    }

    // 返回对象
    PageResponse<StudentManagerDTO> pageResponse = new PageResponse<>();
    PageUtils.buldPageResponse(studentPageRequest, pageResponse);
    pageResponse.setRows(studentManagerDTOs);
    pageResponse.setRecords(count);
    return pageResponse;
  }
 /** 修改学生信息 */
 @Override
 public StudentManagerDTO updateStudentInfo(String userId, String realName, String classId) {
   String schoolId = userService.getSchoolId(userId);
   // 更换用户名称
   usersMapper.updateUserName(userId, realName, schoolId);
   // 更换班级
   MClass mClass = classMapper.selectByPrimaryKey(classId, schoolId);
   studentMapper.updateStudentMessage(userId, mClass);
   // 修改家庭关系表中用户名称
   familyRelationService.updateName(userId, realName);
   MStudentManager studentManager = studentMapper.selectStudentByUserId(userId, schoolId);
   StudentManagerDTO studentManagerDTO = new StudentManagerDTO();
   BeanUtils.copyProperties(studentManager, studentManagerDTO);
   studentManagerDTO.setClassAliasName(
       getGrade(mClass.getYears()) + studentManagerDTO.getClassAliasName());
   // 修改孩子名称,班级信息,删除缓存数据
   deleteRedisOfParent(userId, schoolId);
   cacheService.delete(MessageFormat.format(CacheConstants.KEY_USER, userId));
   return studentManagerDTO;
 }