@ResponseBody
  @RequestMapping(path = "/save_photo", method={RequestMethod.POST})
  public void addDish(@RequestParam("photos") MultipartFile file, HttpServletRequest request, HttpServletResponse response) throws Exception
  {
    String path = null;// 文件路徑
    String json = "";
    if (file!=null) {// 判斷上傳的文件是否為空
      String type = null;// 文件類型
      String fileName = file.getOriginalFilename();// 文件原名稱
      System.out.println("上傳的文件原名稱:"+fileName);
      // 判斷文件類型
      type = fileName.indexOf(".")!=-1?fileName.substring(fileName.lastIndexOf(".")+1, fileName.length()):null;
      if (type!=null) {// 判斷文件類型是否為空
        if ("GIF".equals(type.toUpperCase())||"PNG".equals(type.toUpperCase())||"JPG".equals(type.toUpperCase())) {
          // 項(xiàng)目在容器中實(shí)際發(fā)布運(yùn)行的根路徑
          String realPath = request.getSession().getServletContext().getRealPath("/");
          // 自定義的文件名稱
          String trueFileName = String.valueOf(System.currentTimeMillis()) + "." + type;
          // 設(shè)置存放圖片文件的路徑
          path = realPath+/*System.getProperty("file.separator")+*/trueFileName;
          System.out.println("存放圖片文件的路徑:"+path);
          // 轉(zhuǎn)存文件到指定的路徑
          file.transferTo(new File(path));
          System.out.println("文件成功上傳到指定目錄下");         
          }
          json = "{\"res\":1}";
        }else {
          System.out.println("不是我們想要的文件類型,請按要求重新上傳");
          //return null;
          json = "{\"res\":0}";
        }
      }else {
        System.out.println("文件類型為空");
        //return null;
        json = "{\"res\":0}";
      }
    }else {
      System.out.println("沒有找到相對應(yīng)的文件");
      json = "{\"res\":0}";
      //return null;
    }
    response.setContentType("application/json;charset=UTF-8");
    response.getWriter().print(json);
  }

@RequestParam("photos") MultipartFile file

<form action="/save_photo" enctype="multipart/form-data" method="post">
<input type="file" name="photos" /> <br> 
<input type="submit" value="上傳" /> 
</form>