dwr的安装

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1、将dwr的包拷贝到lib

2、配置web.xml

<span style="font-size:18px;"><span style="font-size:18px;"><listener>         <listener-class>org.directwebremoting.servlet.DwrListener</listener-class>     </listener>            <servlet>         <servlet-name>dwr-invoker</servlet-name>         <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>         <init-param>             <param-name>debug</param-name>             <param-value>true</param-value>         </init-param>                       <!-- dwr的comet控制 -->         <init-param>           <param-name>pollAndCometEnabled</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> </span></span>

3、配置dwr.xml该文件应该放置在WEB-INF中

<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?><!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN" "http://getahead.org/dwr/dwr30.dtd"><dwr>  <allow>    <!--    <filter class="com.example.dwr.monitor.MonitoringAjaxFilter"/>    <filter class="org.directwebremoting.filter.ExtraLatencyAjaxFilter">      <param name="delay" value="200"/>    </filter>    -->    <!-- intro - for the test on index.html -->    <create creator="new">      <param name="class" value="com.coke.dwr.model.MyDwr"/>//对应的类    </create>    <convert converter="bean" match="com.coke.dwr.model.User"/>    <convert converter="bean" match="com.coke.dwr.model.Group"/>         <convert match="java.lang.Exception" converter="exception"/>    <convert converter="bean" match="java.lang.StackTraceElement"/>   </allow></dwr></span>

4、在页面中引入相应的javascript

<span style="font-size:18px;"><%@ 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>My JSP 'MyJsp.jsp' starting page</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="<%=basePath%>/dwr/engine.js"></script><script type="text/javascript" src="<%=basePath%>/dwr/interface/MyDwr.js"></script><script type="text/javascript">MyDwr.hello("你妹！！！",function(data){alert(data);});</script>  </head>    <body>    This is my JSP page. <br>  </body></html></span>

5.以MyDwr.java为例

package com.coke.dwr.model;import java.util.ArrayList;import java.util.List;public class MyDwr {public String hello(String world){System.out.println("MyDwr.hello()"+world);return "hello "+world;}public void deleteObj(){throw new MyException("在删除对象的时候出错！！");}public List<User> list() {List<User> users = new ArrayList<User>();users.add(new User(1,"张三",new Group(1,"财务处")));users.add(new User(2,"李四",new Group(2,"科技处")));users.add(new User(3,"王五",new Group(3,"宣传部")));return users;}}

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