springboot MultipartFile文件上传遇到的问题

1.ajax传过去的参数在controller接受不到

解决:在contoller中增加@RequestParam

例如:saveUploadFile( @RequestParam("file") MultipartFile file,HttpServletRequest request)

2.org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present

将ajax 请求的contextType 改成“multipart/form-data; charset=utf-8”,原来是“text/html; charset=UTF-8”格式都是不对的。还是会出现问题,最后改到 contentType: false,请求不使用contentType

3.org.thymeleaf.exceptions.TemplateInputException: Error resolving template "test/upload", template might not exist or might not be accessible by any of the configured Template Resolvers

解决:是contorller层没有返回数据,要么返回String 直接指向页面,要么返回数据值输出

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