ajax+MultipartFile上传文件到本地

.html

<th data-options="field:'op',align:'center',220,formatter:rmtManager.supportOpFormmater()">操作</th>

<div id="uploadCertificate" >
   <div class="easyui-layout" data-options="fit:true">
      <div data-options="region:'center'" style="padding:10px;">
         <div style="margin-bottom:20px">
            <form id="excelform" method="post" enctype="multipart/form-data">
               <div>请选择要上传的证书:</div>
               <input name="certificate" class="easyui-filebox" data-options="required:'true',buttonText:'选择文件'" style="100%">
               <input type="hidden" id="accountId" name="accountId" value="" />
            </form>
         </div>
      </div>
      <div data-options="region:'south',border:false" style="text-align:right;padding:5px 0 0;">
         <a id="import" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-ok'" >上传</a>
         <a id="cancel" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-cancel'">取消</a>
      </div>
   </div>
</div>


.js

(function($) {
   var pageType= $('#glPageType').val();
   var ctx= $('#ctx').val();
   var editIndex = undefined;
   var busMng = rmtCMHelper.createBusMngInst({
      busMngOptions:{            

                toUpload: function(flag){
                $('#accountId').val(flag);
                $('#uploadCertificate').window({
                 300,
                 height:150,
                 title:'证书导入',
                 minimizable:false,
                 maximizable:false,
                 collapsible:false,
                 modal:true
             });
             $('#uploadCertificate').window('open');
         },

       supportOpFormmater: function(){
           return function(value,row,index){              
           return '<a href="javascript:void(0);" class="todo" onclick="rmtManager.toToken( '+row.id+' )">查看TOKEN</a>&nbsp;&nbsp;&nbsp;&nbsp;'
           + '<a href="javascript:void(0);" class="todo" onclick="rmtManager.addConfig( '+row.id+' )">配置</a>&nbsp;&nbsp;&nbsp;&nbsp;'
           + '<a href="javascript:void(0);" class="todo" onclick="rmtManager.toView( '+row.id+' )">查看</a>&nbsp;&nbsp;&nbsp;&nbsp;'
                      +' <a href="javascript:void(0);" class="todo" onclick="rmtManager.toUpload('+row.id+' )">上传证书</a>&nbsp;&nbsp;&nbsp;&nbsp;';
   }
}

});
$('#import').bind('click', function(){


       $('#excelform').form('submit', {
           url: ctx+"/wxbase/account/upload.html",
           onSubmit: function(){
               if($('#excelform').form('validate'))
                   rmtHelper.showMask();
           },
           success:function(data){
               var data = eval('(' + data + ')');
               if(data.success){
                   rmtHelper.hideMask();
                   $('#uploadCertificate').window('close');
                   rmtHelper.showMsg(data.content);
                   rmtHelper.getCurCurdIst().reloadGrid();
               }else{
                   rmtHelper.hideMask();
                   rmtHelper.showMsg(data.content);
               }
           }
       });
   });
   $('#cancel').bind('click', function(){
       $('#uploadCertificate').window('close');
   });

controller

/**
 * 上传证书
 * @param request
 * @return
 */
@RequestMapping(value="upload", method = RequestMethod.POST)
@ResponseBody
public ResultJsonInfo uploadCertificate(@RequestParam("certificate") MultipartFile certificate, HttpServletRequest request)throws Exception {
   String accountId = request.getParameter("accountId");
   String fileName="";
   try {
//本地地址，与下面荧光字一样的效果，二取一
      String   picPath ="D://"+ accountId +"/";
      //判断之前是否存在证书
      File certificateFile = new File(picPath+accountId+".cer");

      if(certificateFile.exists()) {
         //已存在证书则删除
         certificateFile.delete();
    }

//使用配置文件拼接地址,上传服务器

String picPath = SysConfigHelper.getConfig("cer.dierct")+ accountId +"//";
//判断之前是否存在证书 SysConfigHelper.getConfig
File certificateFiles = new File(picPath);

   if(certificateFiles.isDirectory()) {
       File[] a= certificateFiles.listFiles();
             for(int i=0;i<a.length;i++){
                a[i].delete();

   }
}

      //根据真实路径创建目录文件
      File picSaveFile = new File(picPath);
      //判断是否存在路径
      if(!picSaveFile.exists()) {
      //如果不存在则创建路径
         picSaveFile.mkdirs();
      }
      if (!certificate.isEmpty()) {
            try {
               byte[] buffer =new byte[1024*1024];
               int bytesum = 0;
               int byteread = 0;
               fileName=accountId+".cer";
               FileOutputStream fs=new FileOutputStream( picPath + fileName);
               bytesum+=byteread;
               fs.write(buffer,0,byteread);
               System.out.println("文件流"+certificate.getOriginalFilename());
               // 转存文件 */
               /*certificate.transferTo(new File(picPath));*/
            } catch (Exception e) {
               e.printStackTrace();
            }
         return new ResultJsonInfo(true,"上传成功"+",");
         }
      }catch (Exception e) {
      e.printStackTrace();
      return new ResultJsonInfo(false,"上传失败"+",");
   }
   /*logger.info("导入成功笔数："+count+"，耗时：" + (end - start) + "毫秒");*/
   return new ResultJsonInfo(true,"上传成功"+",");
}

紫色部分都要相同命名