SpringCloud FeignClient调用失败

SpringCloud FeignClient

在spring cloud 使用@FeignClient 远程调用时，远程调用的方法参数 @RequestParam 中要加上参数名称

正确示例：

@FeignClient(value = "antube-money", path = "withdraw")
public interface WithdrawClient {
    @PostMapping("/updateWithdrawOrder")
    ResponseMsg<Void> updateWithdrawOrder(@RequestParam("withdrawId") String withdrawId, @RequestParam("state") Integer state);
}

错误示例：

@FeignClient(value = "antube-money", path = "withdraw")
public interface WithdrawClient {
    @PostMapping("/updateWithdrawOrder")
    ResponseMsg<Void> updateWithdrawOrder(@RequestParam String withdrawId, @RequestParam Integer state);
}

不然启动会创建bean 失败,报如下异常

11:07:09.495 [main ,] WARN  o.s.b.w.s.c.AnnotationConfigServletWebServerApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '*.*.*.WithdrawClient': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: RequestParam.value() was empty on parameter 0

这个小错误已经犯了好多次了，第一次发博客记录。