[实例] DWR Getting Started

Zoey Young Java JavaScript HTML Dwr Java 工作记录

DWR

Getting Started with DWR

入门一下DWR

第一步还是按照官网的Getting Started...只要5步就跑起来了

两个jar包, web.xml中配置, dwr.xml中配置

Getting Started with DWR

Demo.java

package zoey.bean;

public class Demo {
    public String sayHello(String name) {
        return "Hello, " + name;
    }
}

web.xml

<servlet>
    <display-name>DWR Servlet</display-name>
    <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>
</servlet>

<servlet-mapping>
    <servlet-name>dwr-invoker</servlet-name>
    <url-pattern>/dwr/*</url-pattern>
</servlet-mapping>

dwr.xml

<?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>
        <create creator="new" javascript="demo">
            <param name="class" value="zoey.bean.Demo" />
        </create>
    </allow>
</dwr>

Modules known to DWR

Methods For: Demo

index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"  "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Hello DWR</title>
<script type='text/javascript' src='/dwrDemo/dwr/engine.js'></script>
<script type='text/javascript' src='/dwrDemo/dwr/interface/demo.js'></script>
<script type='text/javascript' src='/dwrDemo/dwr/util.js'></script>
<script type='text/javascript'>
  function update() {
      var name = dwr.util.getValue("demoName");
      demo.sayHello(name, function (data) {
          dwr.util.setValue("demoReply", data);
      });
  }
</script>
</head>
<body>
    Name：<input type="text" id="demoName">
    <input type="button" value="Send" onclick="update()" /><br/>
    Reply: <span id="demoReply"></span>
</body>
</html>

Hello DWR

官方还给出了许多事例程序, 接下去根据需要学习了