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String savePath = "d:/";//儲存路徑

      String retMsg = "";//定義將返回給客戶端的資訊

      try {

        if (ServletFileUpload.isMultipartContent(request)) {

          List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);

          for (FileItem item : items) {

            if (!item.isFormField()) {// 過濾掉表單中非檔案域

              String fileType = item.getName().substring(item.getName().lastIndexOf(".") + 1).toLowerCase();//檔案型別

              String fileName = new Date().getTime() + "." + fileType; //儲存的檔名

              String filePath = savePath + "\\" + fileName; //儲存的檔案路徑

              BufferedInputStream in = new BufferedInputStream(item.getInputStream());// 獲得檔案輸入流

              BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File(filePath)));// 獲得檔案輸出流

              org.apache.commons.fileupload.util.Streams.copy(in, out, true);// 開始把檔案寫到指定的上傳資料夾

              retMsg += "上傳檔案成功！";

              in.close();

              out.close();

            } 

          }

        }

        response.setContentType("text/html;charset=utf8");

        PrintWriter pw = response.getWriter();

        pw.print(retMsg);

        pw.flush();

        pw.close();

        //根據自己需要返回頁面一個 retMsg

　　　　　　　　　//　return retMsg 證明上傳成功

      } catch (Exception e) {

        e.printStackTrace();

      }