spring dojo EnhancedGrid 出不来数据，怎么办啊？
我的jsp如下：
<%@page language="java" isELIgnored="false" contentType="text/html; charset=utf-8" pageEncoding="UTF-8"%>
<html >
<head>
<meta name="decorator" content="none"/>
<link rel="stylesheet" href="${pageContext.request.contextPath}/dojo/dijit/themes/claro/claro.css">
<style type="text/css">@import "${pageContext.request.contextPath}/dojo/dojo/resources/dojo.css";
@import "${pageContext.request.contextPath}/dojo/dijit/themes/claro/claro.css";
@import "${pageContext.request.contextPath}/dojo/dojox/grid/enhanced/resources/claro/EnhancedGrid.css";
@import "${pageContext.request.contextPath}/dojo/dojox/grid/enhanced/resources/EnhancedGrid_rtl.css";
/*Grid need a explicit width/height by default*/
#grid {
width: 100%;
height:100%;
}</style>
<script>dojoConfig = {parseOnLoad: true}</script><script src='${pageContext.request.contextPath}/dojo/dojo/dojo.js'></script><script>dojo.require("dojox.grid.EnhancedGrid");
dojo.require("dojox.grid.enhanced.plugins.Pagination");
dojo.require("dojo.data.ItemFileWriteStore");
dojo.require("dojo/store/Memory");
dojo.require("dojo.data.ObjectStore");
dojo.ready(function(){
var dataStore;
/*set up data store*/
var data= dojo.xhrGet({
url:"${pageContext.request.contextPath}/getAllActivity",
handleAs:"json",
load: function(data){
dataStore = new dojo.data.ItemFileReadStore({data: data});
}
});
/*set up layout*/
var layout = [[
{ name: "项目名称", field: "projectName", width: "120px" },
{ name: "活动内容", field: "activityField", width: "120px" },
{ name: "计划", field: "specification", width: "150px;" },
{ name: "活动时间", field: "activityTime", width: "150px" },
{ name: "活动人", field: "user", width: "120px" },
{ name: "备注", field: "memo", width: "80px" }
]];
/*create a new grid:*/
var grid = new dojox.grid.EnhancedGrid({
id: 'grid',
store: dataStore,
structure: layout,
rowSelector: '20px',
plugins: {
pagination: {
pageSizes: ["25", "50", "100", "All"],
description: true,
sizeSwitch: true,
pageStepper: true,
gotoButton: true,
/*page step to be displayed*/
maxPageStep: 4,
/*position of the pagination bar*/
position: "bottom"
}
}
}, document.createElement('div'));
/*append the new grid to the div*/
dojo.byId("gridDiv").appendChild(grid.domNode);
/*Call startup() to render the grid*/
grid.startup();
});</script>
</head>
<body class="claro">
<div id="gridDiv"></div>
</body>
</html>
后台的json代码如下：@RequestMapping("/getAllActivity")
@ResponseBody
public Map<String,List>getAllActivity()throws Exception{
Map<String,List> josnMap = new HashMap<String,List>();
List<Activity> activities =queryManageService.findAllActivity();
List list=new ArrayList();
for(Activity activity:activities)
{
Map<String,Object> activityMap=new HashMap<String,Object>();
activityMap.put("id", activity.getId());
activityMap.put("activityTime", activity.getActivityTime());
activityMap.put("activityField", activity.getActivityField());
if(activity.getProject()!=null){
activityMap.put("projectName", activity.getProject().getProjectName());
}else{
activityMap.put("projectName","");
}
if(activity.getTask()!=null){
activityMap.put("specification",activity.getTask().getSpecification());
}else{
activityMap.put("specification","");
}
activityMap.put("user", activity.getUserByCreater().getCname());
activityMap.put("memo", activity.getMemo());
list.add(activityMap);
}
josnMap.put("activities",list);
return josnMap;
}
json数据的格式如下图：
这是为什么啊？怎么解决啊？