求解部署dwr遇见的问题

wh2000292 2009-03-02 09:57:29

服务器为tomcat6.0
web.xml如下：



<?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">

  <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>

</web-app>

dwr.xml如下：



<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd">

<dwr>

  <allow>

    <create creator="new" javascript="HelloDWR" scope="application">

      <param name="class" value="test.HelloDWR"/>

    </create>

  </allow>

</dwr>

java代码如下：



package test;

public class HelloDWR

{

	public String hello()

	{

		return "hello,DWR";

	}

}

html页面如下：



<html>

	<head>

    	<title>helloDWR</title>

        <script src="/dwr/interface/HelloDWR.js"></script>

	<script src="/dwr/engine.js"></script>

        <script>

		function sayHello()

		{

			HelloDWR.hello(function(data){document.write(data);});

			//JDate.getTime(function(data){document.write(data);});

		}

		</script>

	</head>

    <body>

    <script>

	sayHello();

	</script>

    </body>

</html>

输入url时：http://localhost:8080/testDWR/dwr
有如下异常：
description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet.init() for servlet dwr-invoker threw exception
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Unknown Source)

root cause

java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
org.directwebremoting.dwrp.PollHandler.<clinit>(PollHandler.java:443)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Unknown Source)
org.directwebremoting.impl.ContainerUtil.class$(ContainerUtil.java:97)
org.directwebremoting.impl.ContainerUtil.setupDefaults(ContainerUtil.java:150)
org.directwebremoting.impl.ContainerUtil.setupDefaultContainer(ContainerUtil.java:125)
org.directwebremoting.servlet.DwrServlet.init(DwrServlet.java:73)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Unknown Source)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.13 logs.
如何解决？

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