Struts2+extjs 传输1g大文件时，页面鼠标一直转圈，页面很卡！

var conditionPanel = new Ext.form.FormPanel({
            region:'north',
            renderTo:"left",
            fileUpload:true, 
            items:[{fieldLabel: '上传文件',xtype:'textfield',id:"image",inputType:'file',buttonText:'123',name:'image'}],
            buttons:[{
                text:"提交",
                handler:verify_submit
            }]
             

function verify_submit(){
      var submitForm = conditionPanel.getForm();
      if (submitForm.isValid()){
              submitForm.submit({
                    url:'<%=basePath%>/taskdo/task_uploadFile',
                  params:{action:'submit'},   
                  method: 'post',
                  success:function(form, action){
                 },
                 failure:function(form, action ){
                 }
          });
      }else {
               
      }
}


        });

Struts2+extjs 传输1G大文件时，正在传输过程中，页面鼠标一直转圈，页面很卡！是不是因为是同步传输的原因啊？
怎么才能向百度网盘那样，弹出个框，感觉是异步的对页面没影响呢？

2 个解决方案

#1

技术解决不了的，就换思路解决

#2

引用 楼主 qq_23963765 的回复:

var conditionPanel = new Ext.form.FormPanel({
            region:'north',
            renderTo:"left",
            fileUpload:true, 
            items:[{fieldLabel: '上传文件',xtype:'textfield',id:"image",inputType:'file',buttonText:'123',name:'image'}],
            buttons:[{
                text:"提交",
                handler:verify_submit
            }]
             

function verify_submit(){
      var submitForm = conditionPanel.getForm();
      if (submitForm.isValid()){
              submitForm.submit({
                    url:'<%=basePath%>/taskdo/task_uploadFile',
                  params:{action:'submit'},   
                  method: 'post',
                  success:function(form, action){
                 },
                 failure:function(form, action ){
                 }
          });
      }else {
               
      }
}


        });

Struts2+extjs 传输1G大文件时，正在传输过程中，页面鼠标一直转圈，页面很卡！是不是因为是同步传输的原因啊？
怎么才能向百度网盘那样，弹出个框，感觉是异步的对页面没影响呢？

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