Optional int parameter 'x' is present but cannot be translated into a null value due to being dec...

在编写Feign Client调用其他微服务的时候出现这个错误：

java.lang.IllegalStateException: 
Optional int parameter 'page' is present but cannot be translated into a null value due to being declared as a primitive type. Consider declaring it as object wrapper for the corresponding primitive type.

原因是

 @RequestParam(value ="page",required=false) int page

的参数可能不传，为null。但是参数为int类型，不能赋值为null，故需要修改为Integer

 @RequestParam(value ="page",required=false) Integer page