extjs表单提交数据为什么没有回调success对应的方法？？？？

Question

处理页面都读到数据了，但没有回调success对应的方法？？提交页面：Ext.onReady(function(){ 
          
          Ext.QuickTips.init();
          Ext.form.Field.prototype.msgTarget = 'side';
                  
                 
          var simple = new Ext.FormPanel({
                                labelWidth: 75,                         
                                baseCls: 'x-plain',
                                defaults: {width: 150},
                                defaultType: 'textfield',
                 
                                
                                items: [{
                                                fieldLabel: '账户',
                                                name: 'name',
                                                //anchor:'95%',
                                                allowBlank:false,
                                                blankText:'账户不能为空'
                                        },{
                                            inputType:'password',
                                                fieldLabel: '密码',
                                                //anchor:'95%',
                                                name: 'pws',
                                                allowBlank:false,
                                                blankText:'密码不能为空'
                                        }
                                ],                                buttons: [{
                                        text: '确定',
                                        type: 'submit',
                                        handler:function(){
                              if(simple.form.isValid()){
                                                              
                                  
                                                                  simple.form.doAction('submit',{
                                                                         url:'check.jsp',
                                                                         method:'post',
                                                                         params:'',
                                                                         
                                                                         success:function(form,action){
                                                                          alert("xiaoge");
                                                                                        if (action.result.msg=='ok') {
                                                                                        
                                                                                                //document.location='index.html';
                                                                                                Ext.Msg.alert('提示窗口','提交已成功');
                                                                                        } else {
                                                                                                Ext.Msg.alert('登录错误',action.result.msg);
                                                                                        }
                                                                         },
                                                                        
                                                                         failure:function(){
                                                                                        Ext.Msg.alert('错误','服务器出现错误请稍后在试！');
                                                                         }
                                                                  });
                                                           }                                                                               
                                        }
                                },{
                                        text: '取消',
                                        handler:function(){simple.form.reset();}
                                }]
                        });    
                             
                                   win = new Ext.Window({
                                                id:'win',
                                                title:'注册窗口',
                                                layout:'fit',                                       
                                                width:300,
                                                height:150,
                                                plain:true,
                        bodyStyle:'padding:5px;',
                                                maximizable:false,
                                                closeAction:'close',
                                                closable:false,
                                                collapsible:true,
                                                plain: true,
                                                buttonAlign:'center',
                                                items:simple
                                        });
                                        win.show();
                                                                                
                 });处理页：
request.setCharacterEncoding("gb2312");
      String name=request.getParameter("name");
      String pws=request.getParameter("pws");
      System.out.println(name+" "+pws);
      if(name.equals(pws)){
       System.out.println("ok");
         out.print("{success:true,msg:'ok'}");
      }else{
         out.print("{failure:true,msg:'帐户或密码错误'}");
      }

Answer 1

PrintWriter out = request.getOutputStream();
out.write("{success: true}");
out.flush();
out.close();