<form id="uploadfiles" enctype="multipart/form-data">    <input type="file" multiple="multiple" id="file_upload" name="file_upload" />     <input type="button" value="上傳" onclick="upload()" /></form>

<script type="text/javascript">/* * 上傳文件 */function upload(){  var formData = new FormData($( "#uploadfiles" )[0]);   $.ajax({      type: "post",      url: "./path/upload",      dataType: "json",      data: formData,      /**         *必須false才會自動加上正確的Content-Type         */       contentType : false,       /**         * 必須false才會避開jQuery對 formdata 的默認處理         * XMLHttpRequest會對 formdata 進行正確的處理         */       processData : false,      success: function(data){//從后端返回數據進行處理       if(data){         alert("上傳成功！");       }else{         alert("上傳失敗！");       }      },      error: function(err) {//提交出錯        $("#msg").html(JSON.stringify(err));//打出響應信息        alert("服務器無響應");       }     });}</script>

<!-- 配置文件上傳 -->  <bean id="multipartResolver"    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">    <!-- 默認編碼 -->    <property name="defaultEncoding" value="utf-8" />    <!-- 文件大小最大值 -->    <property name="maxUploadSize" value="10485760000" />    <!-- 內存中的最大值 -->    <property name="maxInMemorySize" value="40960" />  </bean>controller：/*   * 上傳多個文件   */  @RequestMapping(value = "/upload", produces = "application/json;charset=UTF-8")  public @ResponseBody  boolean uploadFiles(@RequestParam("file_upload") MultipartFile [] files) {    boolean result = false;    String realPath;    for(int i=0;i<files.length;i++){      if (!files[i].isEmpty()) {           String uniqueName=files[i].getOriginalFilename();//得到文件名          realPath="E:"+File.separator+uniqueName;//文件上傳的路徑這里為E盤          files[i].transferTo(new File(realPath));  // 轉存文件          result = true;              } catch (Exception e) {           e.printStackTrace();         }       }    }    return result;  }

/*   * 下載多個文件   */  @RequestMapping(value = "/download")  public void downloadFiles(HttpServletResponse response) {    String str= request.getParameter("rows");//下載文件信息，包括文件名、存儲路徑等    JSONArray path=(JSONArray) JSONArray.parse(request.getParameter("rows"));    Path paths[]=new Path[path.size()];    paths = JSONArray.parseArray(str, Path.class).toArray(paths);    String uri = "d:"+ File.separator + "mldn.zip";//臨時文件存儲路徑    File zipFile = new File(uri) ;  // 定義壓縮文件名稱     ZipOutputStream zipOut = null;// 聲明壓縮流對象     InputStream input = null;    //將要壓縮的文件加入到壓縮輸出流中    try {      zipOut = new ZipOutputStream(new FileOutputStream(zipFile));    } catch (FileNotFoundException e) {      e.printStackTrace();    }    for(int i = 0;i<paths.length;i++){      File file = new File(paths[i].getUri()+File.separator+paths[i].getFilename());      try {        input = new FileInputStream(file) ;// 定義文件的輸入流         zipOut.putNextEntry(new ZipEntry(file.getName())) ; // 設置ZipEntry對象       } catch (Exception e) {        e.printStackTrace();      }     }    //將文件寫入到壓縮文件中    int temp = 0 ;     try {      while((temp=input.read())!=-1){ // 讀取內容         zipOut.write(temp) ;  // 寫到壓縮文件中       }    } catch (IOException e) {      e.printStackTrace();    }finally{       try {        input.close() ;        zipOut.close() ;       } catch (IOException e) {        e.printStackTrace();      }     }    try {      // 以流的形式下載文件。      BufferedInputStream fis = new BufferedInputStream(new FileInputStream(zipFile));      byte[] buffer = new byte[fis.available()];      fis.read(buffer);      fis.close();      // 清空response      response.reset();      OutputStream toClient = new BufferedOutputStream(response.getOutputStream());      response.setContentType("application/x-msdownload;");       response.setHeader("Content-Disposition", "attachment;filename=" + zipFile.getName());      toClient.write(buffer);      toClient.flush();      toClient.close();      zipFile.delete();    //將生成的服務器端文件刪除    }     catch (IOException ex) {      ex.printStackTrace();    }    }

function download(){    var form=$("<form>");//定義一個form表單    form.attr("style","display:none");    form.attr("target","");    form.attr("method","post");    form.attr("action","./path/download");//請求url    var input1=$("<input>");    input1.attr("type","hidden");    input1.attr("name","rows");//設置屬性的名字    input1.attr("value",“test”);//設置屬性的值    $("body").append(form);//將表單放置在web中    form.append(input1);    form.submit();//表單提交                     }