DWR与Spring的结合原来如此简单

1. 修改spring的bean定义文件头部声明：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
    http://www.directwebremoting.org/schema/spring-dwr
    http://www.directwebremoting.org/schema/spring-dwr-2.0.xsd">
......

2. 添加<dwr:configuration>，就算没有内容，也必须声明一个空的：

	<dwr:configuration>
		<dwr:convert type="bean" class="com.et.commerce.gwt.client.etProduct.model.EtProduct">
			<dwr:include method="productId,productName,partNo,costPrice,basicPrice"/>
		</dwr:convert>
	</dwr:configuration>

3. 在实现类的bean定义里添加<dwr:remote>。一定要加在实现类的定义里，如果加在接口定义里会报错。

	<bean id="IEtProductService" parent="transactionProxyFactoryBean">
		<property name="target">
			<ref bean="EtProductServiceImpl" />
		</property>
	</bean>
	<bean id="EtProductServiceImpl"
		class="com.et.commerce.gwt.server.etProduct.service.spring.EtProductServiceImpl">
		<dwr:remote javascript="DWRIEtProductService" />

4. 在jsp中的使用

<script type='text/javascript' src='${pageContext.request.contextPath}/dwr/interface/DWRIEtProductService.js'></script>   
<script type='text/javascript' src='${pageContext.request.contextPath}/dwr/engine.js'></script>   
<script type='text/javascript' src='${pageContext.request.contextPath}/dwr/util.js'></script>  
<script type="text/javascript">
function onPartNoChanged(partNo){
	DWRIEtProductService.getEtProductByPartNo(partNo,productChanged);
}
function productChanged(data){
	if(data.length==1){     
 alert(data[0].productName);
	}else if(data.length>1){
   		alert("找到多个商品与此Part No 对应，请重新选择");
   		DWRUtil.setValue("${actionName}_model_product_partNo","");  
   		document.getElementById("${actionName}_model_product_partNo").focus();        
   	}else{
   		alert("没有找到与此Part No 对应的商品，请重新输入");
   		DWRUtil.setValue("${actionName}_model_product_partNo",""); 
   		document.getElementById("${actionName}_model_product_partNo").focus();         
   	}
}