@Override
 public StudentManagerDTO saveStudent(String name, String classId, String schoolId) {
   UserDTO userDTO = new UserDTO();
   userDTO.setRealName(name);
   userDTO.setIdentityId(IdentityIdConstants.STUDENT);
   userDTO.setIdentityDescription("学生");
   userDTO.setSchoolId(schoolId);
   userDTO.setArea(mSchoolMapper.selectByPrimaryKey(schoolId).getArea());
   UserDTO users = userService.saveUser(userDTO);
   MClass mclass = classMapper.selectByPrimaryKey(classId, schoolId);
   StudentDTO studentDTO = new StudentDTO();
   studentDTO.setUserId(users.getUserId());
   studentDTO.setSchoolId(mclass.getSchoolId());
   studentDTO.setSchoolName(mclass.getSchoolName());
   studentDTO.setClassName(mclass.getName());
   studentDTO.setClassId(classId);
   studentDTO.setClassAliasName(mclass.getAliasName());
   studentDTO.setJoinClass(new Date());
   MStudent mStudent = new MStudent();
   BeanUtils.copyProperties(studentDTO, mStudent);
   studentMapper.insert(mStudent);
   MStudentManager studentManager =
       studentMapper.selectStudentByUserId(mStudent.getUserId(), schoolId);
   StudentManagerDTO studentManagerDTO = new StudentManagerDTO();
   BeanUtils.copyProperties(studentManager, studentManagerDTO);
   studentManagerDTO.setClassAliasName(
       ClassNameUtil.getFullName(studentManager.getYears(), studentManager.getClassAliasName()));
   return studentManagerDTO;
 }