Transaction在Controller层的探索

本文主要是介绍Transaction在Controller层的探索，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

Transaction在Controller层的探索

一般开发中事务要求我们放在Service层，可是有些情况，我们可能会要求放在Controller层，你有没有碰到过这样的需求呢？那么放到Controller层事务会生效吗？会产生什么问题呢？下面一起来看看

I、透过现象看本质

第一种情况

Controller层代码如下

@RestController
@RequestMapping("/city")
public class CityControllerImpl implements CityController {@Autowiredprivate CityService cityService;@Override@RequestMapping(value = "getCity",method = RequestMethod.GET,produces = MediaType.APPLICATION_JSON_UTF8_VALUE)@Transcationalpublic BaseResult<City> getCity(@RequestParam("id") Integer id) {City one = cityService.getOne(id);BaseResult<City> baseResult=new BaseResult<>();baseResult.setData(one);return baseResult;}
}

运行结果
对的，你没有看错，当Transactional加载Controller层时出现404异常

　第二种情况

Controller层代码如下

@RestController
@RequestMapping("/city")
public class CityControllerImpl  {@Autowiredprivate CityService cityService;@RequestMapping(value = "getCity",method = RequestMethod.GET,produces = MediaType.APPLICATION_JSON_UTF8_VALUE)@Transactionalpublic BaseResult<City> getCity(@RequestParam("id") Integer id) {City one = cityService.getOne(id);BaseResult<City> baseResult=new BaseResult<>();baseResult.setData(one);return baseResult;}
}