SpringBoot使用注解实现事务管理

た入场券 2022-04-10 05:10 321阅读 0赞

conttoller

controller和普通的controller类一样, 不用改变

@RequestMapping(value = "/path/{id}", method = RequestMethod.DELETE, produces = "application/json")
        @ResponseBody
        public Result delete(HttpServletRequest request,@PathVariable("id") Long id) {
            Result result = null;
            try {
                result = DeleteService.delete(id);
            } catch (Exception e) {
                result = Result.getFailResult("删除记录失败");//前台用来显示出错信息
            }
            return result;
        }

Service

首先在方法上加上 @Transactional(rollbackFor = Exception.class)  , 然后在该方法后面加上 throws Exception ,

为了不报错，我们还须 DeleteService 接口中对应的delete()方法签名修改为：

public void delete(Integer personid) throws Exception;

rollbackFor  该属性用于设置需要进行回滚的异常类数组，当方法中抛出指定异常数组中的异常时，则进行事务回滚。

@Service
    public class DeleteServiceImp implements DeleteService {
    
    　　 @Override
        @Transactional(rollbackFor = Exception.class)//设置检查时异常时回滚事务
        public Result delete(Long id) throws Exception {
            Result result = null;
            int num = myMapper.delete(id);
            int index = 0;
            if (0 < num) {
                index = anotherMapper.deleteById(id);
                if (0 < index) {
                    result = Result.getSuccessResult("删除版本记录成功");
                } else {
                    throw new Exception("删除版本记录失败"); //删除关联表失败时,抛出一个异常  用来触发回滚
                }
            } else {
                throw new Exception("删除项目失败"); //删除失败时, 抛出异常 用来触发回滚
            }
    
            return result;
        }
    }

最后在程序入口类 Application.java 上加上注解 @EnableTransactionManagement , 开启事务注解

参考:[https://blog.csdn.net/yerenyuan\_pku/article/details/52885041][https_blog.csdn.net_yerenyuan_pku_article_details_52885041]

[https_blog.csdn.net_yerenyuan_pku_article_details_52885041]: https://blog.csdn.net/yerenyuan_pku/article/details/52885041