dwr入门 -
dwr：http://directwebremoting.org/dwr/index.html1、新建WEB项目,把dwr.jar放在WEB-INF/lib下.
2、修改web.xml：
<?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"><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list><!-- 新增的dwr配置 --><servlet><servlet-name>dwr-invoker</servlet-name><servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class><init-param><description></description><param-name>debug</param-name><param-value>true</param-value></init-param></servlet><servlet-mapping><servlet-name>dwr-invoker</servlet-name><url-pattern>/dwr/*</url-pattern></servlet-mapping></web-app>
3、写个测试类有hello方法：
package com.xx;public class Test {public String hello(String name) {return "您好！" + name;}}
4、现在在web.xml同级目录下添加dwr.xml文件
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://www.getahead.ltd.uk/dwr//dwr20.dtd"><dwr><allow><create creator="new" javascript="Hello"><param name="class" value="com.xx.Test" /></create></allow></dwr>
5、然后修改index.jsp -- WebRoot下：
<%@ 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 : hello word</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"><!--<link rel="stylesheet" type="text/css" href="styles.css">--><script type='text/javascript' src='dwr/interface/Hello.js'></script><script type='text/javascript' src='dwr/engine.js'></script><script type='text/javascript' src='dwr/util.js'></script><script type='text/javascript' src='hello.js'></script></head><body><input id="user" type="text" /><input type='button' value='打招呼' onclick='hello();' /><div id="result"></div></body></html>
6、同级目录添加hello.js：
function hello() {var user = $('user').value;Hello.hello(user, callback);}function callback(msg) {DWRUtil.setValue('result', msg);}
7、部署,启动服务器,访问,测试！
http://dl.iteye.com/upload/attachment/440170/0175cda7-1e8f-3729-a4b0-ed65517ca8a8.jpg
附带：工程 & 效果图
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