日期:2014-05-16 浏览次数:20633 次
<?xml version="1.0" encoding="GBK"?> <web-app 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" version="2.5"> <!-- 配置DWR的核心Servlet --> <servlet> <!-- 指定DWR核心Servlet的名字 --> <servlet-name>dwr-invoker</servlet-name> <!-- 指定DWR核心Servlet的实现类 --> <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class> <!-- 指定DWR核心Servlet处于调试状态 --> <init-param> <param-name>debug</param-name> <param-value>true</param-value> </init-param> </servlet> <!-- 指定核心Servlet的URL映射 --> <servlet-mapping> <servlet-name>dwr-invoker</servlet-name> <!-- 指定核心Servlet映射的URL --> <url-pattern>/dwr/*</url-pattern> </servlet-mapping> </web-app>?处理类Java
package com.lbx.dwr.json.test; public class Test1 { public String sss(String name){ System.out.println("Test1.test()"); return name + ",你好!"; } }?dwr.xml文件配置
<?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="com.lbx.dwr.json.test.Test1"/> </create> </allow> </dwr>?客户端jsp代码
<%@ 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 'index.jsp' starting page</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"> <!-- 导入DWR为Demo对象动态生成的JavaScript代码库 --> <script type='text/javascript' src='dwr/interface/Demo.js'></script> <!-- 导入DWR引擎的核心JavaScript代码库 --> <script type='text/javascript' src='dwr/engine.js'></script> <!-- DWR的工具JavaScript文件,通过这工具的工具方法可以简化DOM操作 --> <script type='text/javascript' src='dwr/util.js'></script> <script type="text/javascript"> function sendMessage(){ var username = $("name").value; alert(username); Demo.sss(username,{ //指定回调函数 callback:getMsg, //指定超时时长 timeout:1000, //指定错误处理函数 errorHandler:function(message) { alert("错误提示: " + message); }, //指定 warningHandler:function(message) { alert("Oops: " + message); }, textHtmlHandler: function(message) { alert("Oops: " + message); }, exceptionHandler: function(message) { alert("Oops: " + message); }, //指定发送请求的方式 httpMethod:'POST', async:true, //指定发送请求之前的勾子函数 preHook:function(){alert('远程调用之前...')}, //指定发送请求之后的勾子函数 postHook:function(){alert('远程调用之后...')} }); } //回调函数 function getMsg(data) { alert("s"); document.getElementById("show").innerHTML = data; } </script> </head> <body> <h3> 使用JSON格式回调 </h3> 请输入您的名字 <input id="name" name="name" type="text" /> <br /> <input type="button" value="使用JSON格式回调" onclick="sendMessage();" /> <hr /> 下面是服务器的回应: <br />