Extjs 4.0 上传图片 + struts2

有了上传图片控件后 在action 中必须写上以下代码?

1. response.setCharacterEncoding("utf-8");??
2. ????????response.setContentType("text/html"); ?

// action代码public String load4() {System.out.println("获取到了abcd:"+abcd);success = "true";upload.upload("abcdefg.jpg", abcd,"C:\\Program Files\\Apache Software Foundation\\Tomcat 6.0\\webapps\\needMovie\\"+"testImage" + "\\");Watch watch = new Watch();watch.setNum(1);watch.setOnLine("asdfasdf");videoManager.save();JSONObject jo = JSONObject.fromObject(watch);String jsonStr = jo.toString();System.out.println(jsonStr);        response.setCharacterEncoding("utf-8");        response.setContentType("text/html");        try {// 返回成功标识//response.getWriter().println("{success:true}");response.getWriter().println("{success:true,watch:"+jsonStr+"}");response.getWriter().flush();//response.getWriter().notify();} catch (IOException e) {e.printStackTrace();}finally {try {response.getWriter().close();} catch (IOException e) {e.printStackTrace();}}System.out.println("插入成功");return null;}

// 前台代码artist: {            xtype: 'panel', // since we are not using the default 'panel' xtype,// we must specify it            title:'登录',              width:350,              id:'artist-panel',              items:[{                  xtype:'form',                  id:'artist-form',                  defaultType:'textfield',                  bodyStyle : 'padding:5px',                 method:'POST',                  defaults:{                      anchor:'95%',                  },                  items:[{                      id:'loginName',                      name:'loginName',                      fieldLabel:'用户名',                   },{                      id:'password',                      name:'password',                      fieldLabel:'密码',                  },{                 xtype: 'filefield',                     id: 'abcd',                     emptyText: 'Select an image',                     fieldLabel: 'Photo',                     name: 'abcd',                     buttonText: 'asdfasdf',                                     }]             }],                        buttons: [{                text: 'Save',                handler: function(){                       var loginForm = Ext.getCmp('artist-form').form;             loginForm.doAction('submit', {                      url:'save!load4.action',                      method:'POST',                                            waitMsg:'正在登陆...',                      timeout:10000,// 10秒超时,                    // params:loginForm.getValues(),                    success:function(form, action){              alert('登陆成功'+action.result.watch.onLine)                        var isSuc = action.result.success;                        if(isSuc) {                              // 提示用户登陆成功                            Ext.Msg.alert('消息', '登陆成功..');                          }                                                             },                      failure:function(form, action){                          alert('登陆失败');                      }                  });                                          }            }]        }    };

?//XML 代码

<package name="ajax" extends="json-default">        <action name="save" name="success"/>                    </action>    </package>

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