DWR整合Spring

最新推荐文章于 2018-02-02 17:18:00 发布

原创最新推荐文章于 2018-02-02 17:18:00 发布 · 139 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#DWR #Spring #Servlet #Bean #JavaScript #ViewUI

DWR 专栏收录该内容

14 篇文章

订阅专栏

Spring容器中的Bean可以被DWR使用：既然使用到了Spring，所以就要多加一个jar包spring.jar到lib下去。

使用到了Spring容器来产生bean，就得修改web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<context-param>
		<param-name>contextConfigLocation</param-name>
		<!--
				默认找的位置是：/WEB-INF/applicationContext.xml
			-->
		<!--
			<param-value>/WEN-INF/applicationContext-*.xml,classpath*:applicationContext-*.xml</param-value>
		-->
		<param-value>classpath:beans.xml</param-value>
	</context-param>

	<!-- 配置DWR的核心Servlet -->
	<servlet>
		<!-- 指定DWR核心Servlet的名字 -->
		<servlet-name>dwr-invoker</servlet-name>
		<!-- 指定DWR核心Servlet的实现类 -->
		<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
		<!--  指定DWR核心Servlet处于调试状态 -->
		<init-param>
			<param-name>debug</param-name>
			<param-value>true</param-value>
		</init-param>
	</servlet>
	<!-- 指定核心Servlet的URL映射 -->
	<servlet-mapping>
		<servlet-name>dwr-invoker</servlet-name>
		<!-- 指定核心Servlet映射的URL -->
		<url-pattern>/dwr/*</url-pattern>
	</servlet-mapping>

	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>

beans.xml文件的配置

<?xml version="1.0" encoding="GBK"?>
<!-- 指定Spring配置文件的Schema信息 -->
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"	
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
	<!-- 定义了一个bean -->
	<bean id="test" class="com.lbx.dwr.spring.TestSpring" />
</beans>

Java处理类

package com.lbx.dwr.spring;


public class TestSpring {

	//服务器处理方法
	public String test(String name)
	{
		return name + "您好，您已经会调用Spring中的Bean了...";
	}
	
}

dwr.xml文件的配置

<?xml version="1.0" encoding="GBK"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"
	"http://getahead.ltd.uk/dwr/dwr20.dtd">
<dwr>
	<allow>
		<create creator="spring" javascript="Demo">
			<!-- 指定使用Spring容器中的hello Bean -->
			<param name="beanName" value="test"/> 
		</create>
	</allow>
</dwr>

客户端JSP代码

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href="<%=basePath%>">

		<title>DWR整合Spring</title>
		<meta http-equiv="pragma" content="no-cache">
		<meta http-equiv="cache-control" content="no-cache">
		<meta http-equiv="expires" content="0">
		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="This is my page">
		<script type='text/javascript' src='dwr/interface/Demo.js'></script>
		<script type='text/javascript' src='dwr/engine.js'></script>
		<script type='text/javascript' src='dwr/util.js'></script>
		<script type="text/javascript">
			function sendMessage(){
				//调用远程的hello方法，使用了dwr.util的getValue方法获取HTML元素的值
				Demo.test(dwr.util.getValue('name') , cb);
			}
			function cb(data){
				//使用dwr.util的setValue方法设置HTML元素的值
				dwr.util.setValue('show' ,data);
			}
		</script>
	</head>

	<body>
		<h3>
			DWR整合Spring
		</h3>
		请输入您的名字
		<input id="name" name="name" type="text" />
		<br />
		<input type="button" value="调用Spring Bean" onclick="sendMessage();" />
		下面是服务器的回应:
		<hr>
		<div id="show"></div>
	</body>
</html>