一、属性key不加双引号,value加双引号，对于url的value，添加‘’单引号；url的访问地址可以使用以下格式：

datagrid中的url格式：

vardatagrid;$(function(){datagrid= $('#datagrid').datagrid({url :'<%= request.getContextPath()%>/userController/list.do',toolbar :'#toolbar',title :'用户列表',iconCls :'',pagination :true,pageSize :10,pageList : [10, 20, 30, 40, 50, 60, 70, 80, 90, 100],fit :true,fitColumns :true,nowrap :false,border :false,idField :'id',columns:[[{title:'编号',field:'id',width:100,sortable:true},{title:'姓名',field:'name',width:100,sortable:true},{title:'密码',field:'password',width:100,},{title:'年龄',field:'age',width:100,sortable:true},{title:'地址',field:'address',width:100,},{title:'学历',field:'education',width:100,},{title:'身份证号',field:'identity',width:100,},{title:'手机',field:'phon',width:100,},{title:'单位名称',field:'unitname',width:100,},{title:'单位地址',field:'unitaddress',width:100,},{title:'注册时间',field:'createDate',width:100,},{title:'状态',field:'status',width:100,},{title:'上次修改时间',field:'modificationTime',width:100,},{title:'上传文件',field:'uploadFile',width:100,},{title:'ip',field:'ip',width:100,}]],toolbar:[{text:'增加',iconCls:'icon-add',handler:function(){}},'-',{text:'删除',iconCls:'icon-remove',handler:function(){}},'-',{text:'修改',iconCls:'icon-edit',handler:function(){}},'-',{text:'查询',iconCls:'icon-search',handler:function(){}}]});});

easyui的tree需要的添加json格式的变量中的url的格式：

var treeData=[{id:"dispatchingManagement",text:"调度管理",state:"closed",children: [{id:"taskcenter",text:"任务中心",attributes : {  url:'<iframe width="100%" height="100%" frameborder="0"  src="<%= request.getContextPath()%>/userController.do?hh" style="width:100%;height:100%;margin:0px 0px;"></iframe>'}}, {id:"programmeApproval",text:"方案审批",attributes : {  url:""}}]}, {text:"用户管理",state:"closed",children: [{id:"yhgl",text:"用户管理",attributes: {  url :'<iframe width="100%" height="100%" frameborder="0"  src="<%= request.getContextPath()%>/userController.do?center" style="width:100%;height:100%;margin:0px 0px;"></iframe>'}  }]}];

二、url访问注意地址跳转否？若跳转后报$ is not defind等问题，那就在跳转后的界面添加需要引入的文件