SpringBoot2中如何进行文件上传

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12345678910111213141516171819202122232425Controllerpackage com.zz.controller;import org.springframework.beans.factory.annotation.Value;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.MultipartHttpServletRequest;import javax.servlet.http.HttpServletRequest;import java.io.File;import java.io.IOException;@RestControllerpublic class FileController {  //@Value 获取配置文件里面的属性值，并且赋值给下面的属性    @Value("${fileUpLoadPath}")     String filePath;      /**    * @RequestMapping 表示同时支持接收post和get请求。    * 如果加上method=RequestMethod.POST， 表示只接收post请求    * 其实有一个注解可以直接指定，只接收post请求---@PostMapping    * @param req    * @param multiReq    * @throws IOException    */   @PostMapping("/testUpload3")    // @RequestMapping(value="/testUpload3",method=RequestMethod.POST)     public void testUploadFile(HttpServletRequest req,MultipartHttpServletRequest multiReq) throws IOException{         MultipartFile multipartFile= multiReq.getFile("file");         String filename=multipartFile.getOriginalFilename();         System.out.println("文件名字："+multipartFile.getOriginalFilename());         File file=new File(filePath+filename);         multipartFile.transferTo(file);         String username=req.getParameter("username");         System.out.println("用户名字："+username);             }}