1、在做文件上传时碰到了一个问题,如下:
org.springframework.web.multipart.MultipartFile]: Specified class is an interface
解决的办法就是:
在controller层接收文件的前面加上@RequestParam
之前:
之后:
2、出现404页面
一般是没写@ResponseBody注解
3、java.lang.IllegalStateException: Optional long parameter 'id' is not 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.
一般是没写@PathVariable出现的错误