2.在pom.xml加入以下依赖：
<dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.3</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>org.directwebremoting</groupId> <artifactId>dwr</artifactId> <version>3.0.M1</version> </dependency>
3. 在web.xml中配置：
<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> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dwr-invoker</servlet-name> <url-pattern>/dwr/*</url-pattern> </servlet-mapping>
4. 在WEB-INF目录中创建dwr.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC
"-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN"
"http://directwebremoting.org/schema/dwr30.dtd">
<dwr>
<allow>
<!--create表示将一个Java对象公布为一个js对象,这样就会自动创建一个HelloDwr.js-->
<create creator="new">
<!--可以加入javascript="hello",这样生成js对象名就是hello.js-->
<param name="class" value="dwr.HelloDwr"/>
</create>
</allow>
</dwr>
5. 创建dwr包下的类HelloDwr.java
package dwr;
public class HelloDwr {
public String say(String name){
System.out.println("name :" +name);
return "hello"+name;
}
}
6. 创建dwr01.jsp
<%@ 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 'dwr01.jsp' starting page</title>
<!-- 必须引入dwr的engine.js -->
<script type="text/javascript" src="<%=path%>/dwr/engine.js"></script>
<!-- 将java的类引入 -->
<script type="text/javascript" src="<%=path%>/dwr/interface/HelloDwr.js"></script>
<script type="text/javascript">
HelloDwr.say("Hello");
</script>
</head>
<body>
This is my JSP page. <br>
</body>
</html> 7.启动jetty容器。 打开jsp页面，便可在server console中看到name :Hello.