@AllArgsConstructor与@Value共用的问题解决
平时我们用lombok的方式来实现Bean的构造函数方式的注入,但是当遇到@Value注解的时候,就会出现问题,
看下面这段代码
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/** * @author sunhan */ @RestController @AllArgsConstructor @RequestMapping ( "test" ) public class TestController { @Value ( "${test}" ) private String test; private TestService testService; @GetMapping () public String get() { System.out.println(test); return testService.get(); } } |
启动项目的时候,会抛出异常
***************************
APPLICATION FAILED TO START
***************************Description:
Parameter 0 of constructor in com.good.base.controller.TestController required a bean of type 'java.lang.String' that could not be found.
Action:Consider defining a bean of type 'java.lang.String' in your configuration.
如何解决这个问题呢?
其实很简单,将AllArgsConstructor改成RequiredArgsConstructor,然后把需要注入的bean改成final类型的,就可以了
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@RestController @RequiredArgsConstructor @RequestMapping ( "test" ) public class TestController { @Value ( "${test}" ) private String test; private final TestService testService; @GetMapping () public String get() { System.out.println(test); return testService.get(); } } |
参考:这里
@AllArgsConstructor导致@value注入失败
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@AllArgsConstructor @RestController @RequestMapping ( "xx/xx" ) public class WxUserController extends BaseController { private final WxUserService service; private final PointsDetailService pointsDetailService; private final WxUserPointsService wxUserPointsService; @Value ( "${points.registerPoints}" ) private int registerPoints; ................................ } |
直接项目启动失败,报错如下:
解决方法
本人是去掉@AllArgsConstructor,使用@autowired进行注入,应该还有别的方法可以解决这个冲突,我没有试
以上为个人经验,希望能给大家一个参考,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/goodcto/article/details/103592721