java基础之DWR使用

知足常乐 · 发表于 2009-2-17 10:58:53

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1. 导入dwr.jar包; 2. 配置web.xml 如: <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.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>  </servlet> <servlet-mapping> <servlet-name>dwr-invoker</servlet-name> <url-pattern>/dwr/*</url-pattern> </servlet-mapping> </web-app>   3. 写服务端代码(写类) 如: package com.sk.dwr; public class Test { //返回一般数据 public String getString(String s){ return s "Hello"; } //返回对象 Public String getUser(String name){ Return new User(name); } } 4. 于web.xml同目录下添加并配置dwr.xml 如: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN" "http://www.getahead.ltd.uk/dwr/dwr10.dtd"> <dwr>:可以有多个allow标签 <allow>:要暴露给js的方法,可以有多个 <create creator="new" javascript="Hello"> <!—new表示调用无参构造new对象,Hello表示new出的对象的句柄,用于在js中调用 --> <param name="class" value="com.sk.dwr.Test"/> <!—name表示类,value指定类的完整路径 --> </create> [1] [2]  <convert converter="bean" match="com.sk.dwr.Person"/>  </allow> </dwr> 5. 写HTML(jsp)页面如: <meta http-equiv="Context-Type" content="text/html; charset=UTF-8"> <html > <head> <title>TabContainer Demo</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></meta> <script type='text/javascript' src="<%=request.getContextPath()%>/dwr/interface/Hello.js"></script> //Hello.js由dwr生成,于要调用的页面,引用Hello.js <script type="text/javascript" src="<%=request.getContextPath()%>/dwr/engine.js"></script> <script type="text/javascript" src="<%=request.getContextPath()%>/dwr/util.js"></script>  <script type="text/javascript"> var person; function call() { //主调函数; var nameValue=document.getElementById("name").value; //alert(nameValue); Hello.getString(nameValue,callback); //Hello.getUser(nameValue,callback);//参数1,java方法需要的参数,参数2,调用回调函数,dwr自动把返回的数据放入callback的参数内! //JDate.toString(callback); } function callback(User) { //回调函数; DWRUtil.setValue("mydiv",User); //若User为ArrayList,则User.username //alert(User.password); } </script> </head> <body> <table> <tr> <td>Name:</td> <td><input id="name" type="text"/> <input type="button" value="Read" /> </td> </tr> </table> <div id="mydiv"></div> </body> </html> 上一页 [1] [2]

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