/** 查询无班级学生信息 */ @Override public List<StudentManagerDTO> queryStudentsWithoutClassId(String schoolId) { List<MStudentManager> usersList = studentMapper.selectStudentsWithoutClassId(null, schoolId); List<StudentManagerDTO> userDTOList = new ArrayList<>(); for (MStudentManager user : usersList) { StudentManagerDTO userDTO = new StudentManagerDTO(); BeanUtils.copyProperties(user, userDTO); userDTOList.add(userDTO); } return userDTOList; }