request.setAttribute和request.getAttribute的搭配使用

前台页面带着areaid参数请求更新此id的数据，跳转到更新数据页面时需要在更新页面先填充上原来的数据。用request.setAttribute和request.getAttribute的搭配使用来解决此问题。

</pre><pre name="code" class="plain">

@RequestMapping(value="area_updateInput.action")
	public String areaUpdateInput(int areaId,HttpServletRequest request){
		System.out.println(areaId);
		List<AreaDomain> area=areaService.getAreaById(areaId);
		<strong><span style="color:#ff0000;">request.setAttribute("areaname", area.get(0).getAreaName());</span></strong>
		request.setAttribute("areamap", area.get(0).getAreaMap());
		request.setAttribute("arearemark", area.get(0).getAreaRemark());
		request.setAttribute("areaextend", area.get(0).getAreaExtend());
		request.setAttribute("areascales", area.get(0).getAreaScales());
		request.setAttribute("devicetablename", area.get(0).getDeviceTablename());
		request.setAttribute("spacetablename", area.get(0).getSpaceTablename());
		request.setAttribute("pathtablename", area.get(0).getPathTablename());		

		return "person_manage/area/area_update_input";
	}

var devInfoForm = new Ext.FormPanel({
	        labelWidth: 75, // label settings here cascade unless overridden
	        frame:true,
	        title: '更新区域',
	        bodyStyle:'padding:5px 5px 0',
	        width: 350,
	        defaults: {width: 230},
	        defaultType: 'textfield',
			name:"areaInfo",
	        items: [{
	                fieldLabel: '区域名称',
	                name: 'areaName',
	                <strong><span style="color:#ff0000;">value:'<%=request.getAttribute("areaname")%>',</span></strong>
	                allowBlank : false //此验证依然有效.不许为空.
	            },{
	                fieldLabel: '区域地图',
	                name: 'areaMap',
	                value:'<%=request.getAttribute("areamap")%>'
				},{
	                fieldLabel: '区域备注',
	                name: 'areaRemark',
	                value:'<%=request.getAttribute("arearemark")%>'
				},{
	                fieldLabel: '区域坐标',
	                name: 'areaExtend',
	                value:'<%=request.getAttribute("areaextend")%>',
	        		regex :/^[+-]?([1-9][0-9]*|0),[+-]?([1-9][0-9]*|0),[+-]?([1-9][0-9]*|0),[+-]?([1-9][0-9]*|0)$/, //正则表达式在/...../之间.
	                regexText:"格式例如10,-60,80,0",
	                allowBlank : false //此验证依然有效.不许为空.
				},{
	                fieldLabel: '区域比例',
	                name: 'areaScales',
	                value:'<%=request.getAttribute("areascales")%>',
	        		regex : /^([1-9][0-9]*|0),([1-9][0-9]*|0),([1-9][0-9]*|0)$/,
	                regexText:"格式例如400000,250000,80000",
	                allowBlank : false
				},{
	                fieldLabel: '设备表名',
	                name: 'deviceTablename',
	                value:'<%=request.getAttribute("devicetablename")%>'
				},{
	                fieldLabel: '空间表名',
	                name: 'spaceTablename',
	                value:'<%=request.getAttribute("spacetablename")%>'
				},{
	                fieldLabel: '路径表名',
	                name: 'pathTablename',
	                value:'<%=request.getAttribute("pathtablename")%>'
				}
	        ],