方法上加@Transactional注解
1：: throw new RuntimeException();
2：TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();
示例：
@Transactional
public int deleteStudentsById(Integer id) {
StudentsResponse studentsResponse = studentsDao.getStudentsById(id);
try {
sysUserClientService.saveUserOrUpdateStudentCount(studentsResponse.getMobile(), -1, studentsResponse.getCityId());
} catch (Exception e) {
TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();
}
return studentsDao.deleteStudentsById(id);
}
