Extjs后台用Struts2分页出现问题

Question

我用extjs分页时，基本能运行了。但有个地方一直出错，每页13条记录，当最后一页不足13条时，最后一页没法显示，估计是代码有问题，后台用struts2做的，望高手指点。
这是extjs前台部分代码var studentGrid = new Ext.grid.GridPanel({
        frame:true,
        autoHeight:true,
        store : studentStore,
        cm : studentCm,
        viewConfig : {
            forceFit : true
        },
        stripeRows:true,
        loadMask:{
            msg:'正在加载数据,请稍后...'
        },
        bbar:new Ext.PagingToolbar({
            pageSize:13,
            store:studentStore,
            displayInfo:true,
            displayMsg:'显示第 {0} 条到 {1} 条的记录, 一共 {2} 条',
            emptyMsg:'没有记录'
        })
    });
    studentStore.load({params:{start:0,limit:13}});这是后台Action代码public String query(){
        userDao=new UserDaoImp();
        List<User> users=userDao.getUsers("Student");
        Iterator it=users.iterator();
        while(it.hasNext()){
            studentList.add((Student)it.next());
        }
        totalCount=userDao.findAllRows("Student");
        
        JSONArray jarray=JSONArray.fromObject(studentList.subList(this.getStart(),this.getStart()+this.getLimit()));
        json="{totalCount:"+this.getTotalCount()+",start:"+this.getStart()+",limit:"+this.getLimit()+",root:"+jarray.toString()+"}";
        HttpServletResponse response = ServletActionContext.getResponse();
        response.setContentType("text/json;charset=UTF-8");
        try {
            PrintWriter out = response.getWriter();
            out.write(json);
            out.flush();
            out.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

Answer 1

你先看看\examples\grid文件夹下的示例。

Answer 2

paging.html文件示例跟你的描述一样。

Answer 3

不会吧
   我用ExtJs一年多来怎么没有发现这个问题呀</script>
</head>
<script type="text/javascript">
Ext.onReady(function() {
var _url = '<%=basePath%>/com.lxitedu.chinaMobile.wwwManage.action/queryLognote';
var checkbox = new Ext.grid.CheckboxSelectionModel({});
var rowNumber = new Ext.grid.RowNumberer();
var colM = [rowNumber,checkbox,{header:'序  列  号',dataIndex:'id',sortable:true,align:'center'},
   {header:'用  户  名',dataIndex:'userName',sortable:true,align:'center'},
   {header:'登 录  IP',dataIndex:'userip',sortable:true,align:'center'},
   {header:'登录日期',dataIndex:'logindate',sortable:true,align:'center'},
   {header:'登录状态',dataIndex:'loginstate',sortable:true,align:'center'}];
var store = new Ext.data.Store( {
url :_url,
method:'POST',
baseParams:{limit:10,start:0},
reader: new Ext.data.JsonReader(
{
root:'result',
totalProperty:'totalCount'
},
Ext.data.Record.create([
{name:'id',mapping:'id'},
{name:'userName',mapping:'userName'},
{name:'userip',mapping:'userip'},
{name:'logindate',mapping:'logindate'},
{name:'loginstate',mapping:'loginstate'}
])
),
autoLoad:true
});
var pagging = new Ext.PagingToolbar( {
store : store,
pageSize : 10,
displayInfo : true,
displayMsg : '显示第{0}条到{1}条记录，一共{2}条'
});
var config = {
title:'日志查询',
width:560,
height:330,
id:'grid',
frame:true,
renderTo: 'mainDiv',
columns:colM,
sm:checkbox,
store:store,
bbar:pagging,
tbar:["->",
{text:'删除',handler:del}
]
};
var grid = new Ext.grid.GridPanel(config);
function del(){
var record = grid.getSelectionModel().getSelections();
if(record.length != 0){
for(var i = 0;i<record.length;i++){
Ext.Ajax.request({
url:'<%=basePath%>/com.lxitedu.chinaMobile.wwwManage.action/deleteLognote',
method:'POST',
success:function(action,response){
location.href='queryLognote.jsp';
},
params:{
'lognoteForm.id':record[i].get('id')
}
});
}
}else {
alert("请选择要删除的行");
}
}
});
</script>
这是我写的代码基本上一致呀，你们看看那里不对的地方我们共同讨论