一，准备工作：
a>.dwr.jar version:2.0.5
b>.将获得的上述文件解压，获得以下两个依赖js：
①/WebRoot/dwr/engine.js
②/WebRoot/dwr/util.js
二，创建web工程：
a>.新建web工程，将jar包和js文件至于工程内。
b>.配置web.xml配置文件：
<!-- dwr 映射配置 {begin-->
<servlet>
<servlet-name>dwr-invoker</servlet-name>
<servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
<init-param>
<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>
<!-- dwr 映射配置 end}-->c>.添加与后台交互的java文件：
package com.sinovatech.dwr;
public class DwrService {
public static String getArrayNames(String name){
StringBuffer names = new StringBuffer();
for (int i = 0; i < 5; i++) {
names.append(name).append(i).append("|");
if(i == 4){
names.append(name).append(i);
}
}
return names.toString();
}
}d>.添加dwr.xml配置文件与web.xml通目录：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"
"http://getahead.ltd.uk/dwr/dwr20.dtd">
<dwr>
<allow>
<create creator="new" javascript="DwrService">
<param name="class" value="com.sinovatech.dwr.DwrService"/>
</create>
</allow>
</dwr>e>.测试页面index.jsp:
<%@ page language="java" pageEncoding="GBK"%>
<%
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 测试工程</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='<%=basePath%>/dwr/interface/DwrService.js'></script>
<script type="text/javascript" src="<%=basePath%>/dwr/engine.js"></script>
<script type="text/javascript" src="<%=basePath%>/dwr/util.js"></script>
<script type="text/javascript">
function onloadWrite(){
//if(同步or异步执行)
// DWREngine.setAsync(true);
//else
// DWREngine.setAsync(false);
DwrService.getArrayNames('大活宝',nameWrite);
//回调函数
function nameWrite(result){
var names = result.split('|');
for(var i=0; i<names.length; i++) {
if(i == 0){
document.getElementById('name').options[i] = new Option(names[i],i,true,true);
}
else{
document.getElementById('name').options[i] = new Option(names[i],i,false,false);
}
}
}
}
</script>
</head>
<body onload="onloadWrite()">
姓名：<select name="name" id="name"></select>
</body>
</html>
