extjs 新手一枚，想知道 后台给ext传json格式该怎么传？

[sdu_hanson]

后台用的是stucts2，
我的前端代码

var chargeElecStore = new Ext.data.Store({
    proxy: new Ext.data.HttpProxy({url:'getChangeElecDevice.action'}),//提交的页面       
    reader: new Ext.data.JsonReader({ root: "root"}, [
        {name: 'deviceID',mapping:'deviceID',type:'string'},
        {name: 'deviceNm',mapping:'deviceNm',type:'string'},
        {name: 'deviceCode',mapping:'deviceCode',type:'string'}
    ])
});
chargeElecStore.load();

action中代码

private JSONArray deviceList;
	
	public JSONArray getDeviceList() {
		return deviceList;
	}

	public void setDeviceList(JSONArray deviceList) {
		this.deviceList = deviceList;
	}

	public String execute() throws Exception 
	{ 
		List<ChargeElecDevice> deviceLst = deviceDao.getChangeDev();
		
		JSONArray jsonArray = JSONArray.fromObject(deviceLst);
		this.setDeviceList(jsonArray);
		return SUCCESS;
	}

stucts.xml

<package name="evcs.action" extends="json-default">   
   <!--获取充电机-->
      <action name="getChangeElecDevice" class="evcs.action.GetElecDeviceAction">    
        <result name="success" type="json">
          <param name="root">deviceList</param>
        </result> 
        <result name="error" type="json">
          <param name="root">deviceList</param>
        </result>   
      </action> 
     </package>  

为什么我前台取不到数据呢？
哪个地方写的不对》谢谢了。

[syhxj]

照着extjs的api来就行，firebug监控一下看看具体的错误

[sdu_hanson]

顶顶~~~~~~~~~~~~~~~~~

[wxdawxq]

	protected List deviceList= new ArrayList();
	public List getDeviceList() {
		return deviceList;
	}

	public void setDeviceList(List deviceList) {
		this.deviceList = deviceList;
	}

	public String execute() throws Exception 
	{ 
		List deviceLst = deviceDao.getChangeDev();
		
		return SUCCESS;
	}

[wxdawxq]

	protected List deviceList= new ArrayList();
	public List getDeviceList() {
		return deviceList;
	}

	public void setDeviceList(List deviceList) {
		this.deviceList = deviceList;
	}

	public String execute() throws Exception 
	{ 
		deviceList = deviceDao.getChangeDev();
		
		return SUCCESS;
	}

[sdu_hanson]

引用 4 楼 wxdawxq 的回复:

	protected List deviceList= new ArrayList();
	public List getDeviceList() {
		return deviceList;
	}

	public void setDeviceList(List deviceList) {
		this.deviceList = deviceList;
	}

	public String execute() throws Exception 
	{ 
		deviceList = deviceDao.getChangeDev();
		
		return SUCCESS;
	}

你是说直接传list格式的？ 还是没反应

[sdu_hanson]

有知道的么，郁闷了~~~

[wxdawxq]

引用 6 楼 sdu_hanson 的回复:

有知道的么，郁闷了~~~

stucts2在继承json-default后会自动把root描述中对应的对象转换成json串 没用过EXT， 不过看你EXT的代码你试试改成下面这样

         protected Map deviceList;

	public Map getDeviceList() {
		return deviceList;
	}

	public void setDeviceList(Map deviceList) {
		this.deviceList = deviceList;
	}

	public String execute() throws Exception 
	{ 
		List devices = deviceDao.getChangeDev();
		deviceList = new HashMap<String, Object>();
                deviceList.put(”root“, deviceList );
		return SUCCESS;
	}

[Go 旅城通票]

var chargeElecStore = new Ext.data.Store({
    proxy: new Ext.data.HttpProxy({url:'getChangeElecDevice.action'}),//提交的页面       
    reader: new Ext.data.JsonReader({ root: "root"})
, fields:[///////
        {name: 'deviceID',mapping:'deviceID',type:'string'},
        {name: 'deviceNm',mapping:'deviceNm',type:'string'},
        {name: 'deviceCode',mapping:'deviceCode',type:'string'}
    ]///)
});

什么版本的ext？4+ 应该上面拿上配置store