@RequestParam引发的问题，nested exception is java.lang.IllegalStateException: RequestParam.value() was emp

解决Feign@RequestParam异常

最新推荐文章于 2025-10-31 11:10:04 发布

原创最新推荐文章于 2025-10-31 11:10:04 发布 · 606 阅读

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本文描述了一种在使用Feign进行Get请求时遇到的问题，即RequestParam注解导致的异常，并提供了解决方案，通过明确指定@RequestParam参数名称来避免空参数异常。

直接上异常：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'loginController': Unsatisfied dependency expressed through field 'wxMpService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'wxMpConfiguration' defined in URL [jar:file:/app.jar!/BOOT-INF/classes!/com/trtjk/tp/distribution/api/config/WxMpConfiguration.class]: Unsatisfied dependency expressed through constructor parameter 11; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'cardSubmitMembercardUserInfoHandler': Unsatisfied dependency expressed through field 'memberFeignService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.trtjk.tp.distribution.server.feign.MemberFeignService': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: RequestParam.value() was empty on parameter 0

描述：

使用Feign调用，Get请求的参数使用了@RequestParam注解，引发了上面的问题。

将@RequestParam改成@RequestParam("param")

解决了问题，其中param是接口参数名。