nested exception is java.lang.IllegalStateException: PathVariable annotation was empty on param 0.
nested exception is java.lang.IllegalStateException: PathVariable annotation was empty on param 0.
joshua317
发布于 2022-10-31 11:47:14
发布于 2022-10-31 11:47:14
文章被收录于专栏：技术博文
本文为joshua317原创文章,转载请注明：转载自joshua317博客 https://www.joshua317.com/article/282
错误显示：
使用SpringBoot进行开发时，使用feign组件进行远程调用，可能会产生了这样的异常信息：
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'xxxxx': Injection of resource dependencies failed;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'xxxx': Injection of resource dependencies failed;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'xxxxx': FactoryBean threw exception on object creation;
nested exception is java.lang.IllegalStateException: PathVariable annotation was empty on param 0.重点看这句话的异常信息
nested exception is java.lang.IllegalStateException: PathVariable annotation was empty on param 0.原因：从异常信息中看出，是因为PathVariable注解有问题！也就是@PathVariable注解的第0个值为空！
当时声明明Feign接口方法时候，使用@PathVariable注解的接口方法：
@GetMapping("/account/{clientId}")
public User get(@PathVariable String clientId);path路径部分只有一个clientId变量，那么说在“was empty on param 0”，也就是说clientId值没有取到！
解决:
将@PathVariable修改为@PathVariable(value="clientId")的写法，明确带有value="clientId"！
@GetMapping("/account/{clientId}")
public User get(@PathVariable(value="clientId") String clientId);重新编译即可！
一句话总结：
使用feign时，如果参数中带有@PathVariable则需要使用value显示指明参数名
本文为joshua317原创文章,转载请注明：转载自joshua317博客 https://www.joshua317.com/article/282
本文参与 腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。
原始发表：2022-10-21，如有侵权请联系 cloudcommunity@tencent.com 删除
评论
登录后参与评论
推荐阅读
腾讯云开发者
