/** * 删除班级 * * @param gradeVo * @return */ @RequestMapping(value = "/maintainer/grade/deleteGrade", method = RequestMethod.POST) @ResponseBody public AjaxData deleteGrade(GradeVo gradeVo) { List<Student> students = studentService.findByGradeId(gradeVo.getId()); if (students.isEmpty()) { gradeService.deleteById(gradeVo.getId()); return new AjaxData().success().msg("删除成功!"); } else { return new AjaxData().fail().msg("删除失败,该班级下已有学生!"); } }