dwr入门代码一

最新推荐文章于 2025-08-09 20:51:19 发布

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最新推荐文章于 2025-08-09 20:51:19 发布

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分类专栏： DWR 文章标签： dwr javascript function string encoding input

本文链接：https://blog.youkuaiyun.com/huangrong520raoting/article/details/6559700

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WEB-INF目录下创建一个dwr.xml文件
dwr.xml 配置代码：
Xml代码
<?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="Hello" scope="application">
        <param name="class" value="com.xzj.service.HelloWorldService"/>
    </create>
</allow>
</dwr>
web.xml中的配置如下：
Xml代码
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   <A href="http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
target=_blank>http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd</A>">
  
   <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>
  

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

然后我们在src目录下创建一个com.xzj.service包在次包中创建一个类名为：HelloWorldService
在这个包中写两个方法
在这个包中写两个方法
代码如下：
Java代码
package com.xzj.service;

public class HelloWorldService {
    private static String msg="请输入姓名!";

    public String helloWorld(){
        return "Hello DWR World!";
    }

    public String hello(String name){

     if("".equals(name)||null==name){
        return msg;
    }
     if(!"".equals(name)||null==name){
          msg="Hello"+name+" 先生";
     }
      return msg;
    }
}

然后我们回到前台index.jsp页面中代码如下：
Java代码
<%@ page language="java"  pageEncoding="UTF-8"%>
<html>
  <head>
    <title>DWR Hello World!</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='dwr/interface/Hello.js'></script>
　　       <script type="text/javascript" src='dwr/engine.js'></script>
　　       <script type="text/javascript" src='dwr/util.js'></script>
    <script type="text/javascript">
        function helloWorld(){
            Hello.helloWorld(showMessage);
            function showMessage(msg){
                alert(msg);
            }
        }

        function hello(){
          // var name = $('txtName').value;
          //Hello.hello(name,showMessage());
            Hello.hello(txtName.value,showMessage);
            function showMessage(msg){
                alert(msg);
            }
        }
    </script>
  </head>
  <body>
    <center>
        <input type="button" name="btnHello" value="HelloWord" onclick="helloWorld()"/>
        <br><br><br><br>
        Please Enter You Name:<input type="text" name="name" id="txtName"/>
        <input type="button" name="btnHello" value="HelloWord" onclick="hello()"/>
    </center>
  </body>
</html>
另外版本需要的是5.5的，6.0的配置变了