1:事务+try catch
//要点1:添加注解 @Transactional
//要点2:适用try catch
//要点3: catch里添加 TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();
@Override
@Transactional
public ResultData save(Model req) {
try {
//业务代码
} catch (Exception e) {
TransactionAspectSupport.currentTransactionStatus