ext和struts1问题(急)

我的页面代码是:

 var store1 = new Ext.data.Store({
        proxy : new Ext.data.HttpProxy({
            url: 'InfohouseMgr.do'
        }),

        // set up the JsonReader
        reader : new Ext.data.JsonReader({
            root : 'taskList',
           // totalProperty : 'totalSize'
        },[
         {name: 'ipaddress', type: 'string'},
            {name: 'sendmobiles', type: 'string'},
            {name: 'sendemail', type: 'string'}
        ])
    });
    store1.load();
 var dis=new Ext.grid.ColumnModel([
  {header:"IP地址",dataIndex:"ipaddress",sortable:true,align:"center"},
  {header:"短信接收者",dataIndex:"sendmobiles",sortable:true,align:"center"},
  {header:"邮件接收者",dataIndex:"sendemail",sortable:true,align:"center"}
  
 ]);
 
 var grid = new Ext.grid.GridPanel({
  renderTo:"hello",
  title:"表格",
  height:200,
  width:600,
  cm:dis,
  store:store1,
  autoExpandColumn:2
 });

 

Action中的代码是:

Map map=new Hashtable();
  map.put("success", true);
  map.put("taskList", list);

        JSONObject jsonMap = JSONObject.fromObject(map);
        response.getWriter().write(jsonMap.toString());
        System.out.println(jsonMap.toString());
        request.setAttribute("json", jsonMap.toString());

 

我取到的list能成功的转换成json格式,但是页面上就是出不来。我想问一下大哥大姐一下，帮我看看错误，我都调了一天了，还没有出来，本人技术比较菜，谢谢了

问题补充：
页面

var store1 = new Ext.data.Store({

        proxy : new Ext.data.HttpProxy({
            url: '/nms/infohouse/middle.jsp'
        }),

        // set up the JsonReader
        reader : new Ext.data.JsonReader({
            root : 'taskList',
            totalProperty : 'totalSize'
        },[
        {name: 'ipaddress', type: 'string'},
            {name: 'sendmobiles', type: 'string'},
            {name: 'sendemail', type: 'string'}
        ])
    });
    store1.load();
var dis=new Ext.grid.ColumnModel([
{header:"IP地址",dataIndex:"ipaddress",sortable:true,align:"center"},
{header:"短信接收者",dataIndex:"sendmobiles",sortable:true,align:"center"},
{header:"邮件接收者",dataIndex:"sendemail",sortable:true,align:"center"}

]);

var grid = new Ext.grid.GridPanel({
renderTo:"hello",
title:"表格",
height:200,
width:600,
cm:dis,
store:store1,
autoExpandColumn:2
});

action中

Map map=new Hashtable();
//map.put("success", true);
map.put("totalSize", list.size());
map.put("taskList", list);

        JSONObject jsonMap = JSONObject.fromObject(map);
        response.getWriter().write(jsonMap.toString());
        System.out.println(jsonMap.toString());
        request.setAttribute("json", jsonMap.toString());
问题补充：
后对能够正确的打印出json的值
问题补充：
{"totalSize":3,"taskList":[{"dataType":"sqlserver","databaseName":"nms","disPass
word":"webnms","disconf_id":2,"disname":"nsm","formeripaddress":"","ipaddress":"
10.10.152.28","mon_flag":0,"netlocation":{"bak":"综合客服","id":5,"netname":"综
合客服"},"portnum":23,"sendemail":"","sendmobiles":"","setAlarm":""},{"dataType"
:"sqlserver","databaseName":"nms","disPassword":"123123","disconf_id":1,"disname
":"23","formeripaddress":"","ipaddress":"10.10.152.11","mon_flag":0,"netlocation
":{"bak":"主机管理员","id":3,"netname":"主机管理员"},"portnum":123,"sendemail":"
admin","sendmobiles":"admin","setAlarm":""},{"dataType":"sqlserver","databaseNam
e":"nms","disPassword":"123","disconf_id":3,"disname":"nsm","formeripaddress":""
,"ipaddress":"10.10.152.29","mon_flag":0,"netlocation":{"bak":"固话网管","id":8,
"netname":"固话网管"},"portnum":23,"sendemail":"admin","sendmobiles":"123","setA
larm":""}]}
问题补充：
以上的数据格式肯定没有问题，我试过，还有一个问题是，我给一个jsp页面加了一个进度条，之后，效果出来了，只是数据全变成乱码了，我加进度条的时候，没有把
<script type="text/javascript" src="<%=request.getContextPath()%>/WEB-SRC/lib/locale/ext-lang-zh_CN.js"></script>
加进去，其它的都加了，如果加了的话，页面就报错

这样就没问题了

[code="java"]
var store1 = new Ext.data.Store({

    proxy : new Ext.data.HttpProxy({
        url: '/nms/infohouse/middle.jsp'
    }),

    // set up the JsonReader
    reader : new Ext.data.JsonReader({
        root : 'taskList',
        totalProperty : 'totalSize'
    },[
    {name: 'ipaddress', type: 'string'},
        {name: 'sendmobiles', type: 'string'},
        {name: 'sendemail', type: 'string'}
    ])
});
store1.load();

var dis=new Ext.grid.ColumnModel([
{header:"IP地址",dataIndex:"ipaddress",sortable:true,align:"center"},
{id:"sendmobiles",header:"短信接收者",dataIndex:"sendmobiles",sortable:true,align:"center"},
{header:"邮件接收者",dataIndex:"sendemail",sortable:true,align:"center"}

]);

var grid = new Ext.grid.GridPanel({
renderTo:"hello",
title:"表格",
height:200,
width:600,
cm:dis,
store:store1,
autoExpandColumn:"sendmobiles"//注意这里，这里只能是指定一列的id，不能用序号
});
[/code]

// totalProperty : 'totalSize'

这个也要用啊，

LZ参考这个
[url]http://itren.iteye.com/admin/blogs/255562[/url]

把你的json字符串，粘出来看，