ext ajax json与struts实例?

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? ? ext的javascript代码：

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//提交修改
	function submitUpdate(grid,colIndex,rowIndex,id){
		//后台semanticsBean
		var sentence = Ext.getCmp('updateSentence').getValue();
		var template = Ext.getCmp('updateTemplatesql').getValue();
		var tableids = Ext.getCmp('updateTableids').getValue();
		var jsonBean = {
			'bean.id' : id,
			'bean.sentence' : sentence,
			'bean.template' : template,
			'bean.tableids' : tableids
		}
		var bean = {id:id,sentence:sentence,template:template,tableids:tableids};
		Ext.Ajax.request({
			url:'./modifySemantics',
			params:jsonBean,
			success:function(r,o){
				reRenderTable(grid,colIndex,rowIndex,bean);
			},
			failure:function(){
				Ext.Msg.alert("更新有误","更新有误,当前数据过旧，请刷新重试");
			}
		});
	}

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struts配置文件：

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<!-- 更新语义库记录 -->
<action name="modifySemantics" class="com.bonc.vbap.nl.action.NLManageAction" method="updateSemanticsList">
</action>

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strut java代码：

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? ?类中属性

	 // 前台传输实体bean
	private SemanticsSqlTemp bean = new SemanticsSqlTemp();

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public String updateSemanticsList(){
		try{
			if(this.bean == null || this.bean.getId() == 0){
				logger.error("更新语义库sql模板报错,传输数据缺少ID");
				return Action.NONE;
			}
			ArrayList<Object> keyvalueList = new ArrayList<Object>();
			ArrayList<Class<?>> classtypeList = new ArrayList<Class<?>>();
			bean.setUpdateData(keyvalueList, classtypeList);
			String sql = "update sql_template_set set sentence = ?,templatesql = ?,tableids = ? where id = ?";
			NLSqlAnalysis.updateByID(sql, bean, keyvalueList, classtypeList);
			return Action.NONE;
		}catch (Exception e) {
			logger.error("更新语义库sql模板报错",e);
			return Action.ERROR;
		}
	}

?这样就可以让struts接收json对象

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再附上一个解析传回的json对象代码

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function showSemanticsList(type,renderDivID)
	{
		//var showradio = Ext.getCmp("showRadioGroup"); 
		//var showtype = getRadioInputValue(showradio);//获取数据标志
		Ext.Ajax.request({
			url:'./showSemantics',
			params:{
				showType:type
			},
			success : function(r,o){
				var re = Ext.decode(r.responseText);
				if(re.length>0)
					showSemanticsData(type,re,renderDivID);//TODO:
				else{
					document.getElementById(renderDivID).innerHTML = "";
					Ext.Msg.alert("无所选数据");
				}
			},
			failure : function(){
				Ext.Msg.alert("语义库查询有误","语义库查询有误");
			}
		});
	}

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?在js中解析json对象：

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function showItem(grid,colIndex,rowIndex){
		var id = rowIndex.data.id;
		Ext.Ajax.request({
			url:'./getSemantics',
			params:{id:id},
			success:function(r,o){
				var re = Ext.decode(r.responseText);
				showItemEditPage(2,grid,colIndex,rowIndex,re);
			},
			failure:function(){Ext.Msg.alert("语义查询有误","语义查询有误");}
		});
	}

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