初学DWR,碰到的错误
我的问题是程序启动后,打开index.jsp firefox就报错
'You must include DWR engine before including this file'
if (typeof dwr == 'undefined' || dwr.engine == undefined) throw new Error('You must include DWR engine before including this file');
web.xml配置
<?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"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <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>
<?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="UserService"> <param name="class" value="com.accp.service.UserService"></param> <include method="login"/> </create> </allow></dwr>
package com.accp.service;public class UserService { public boolean login(String username,String password){ if(username.equals("zjy") && password.equals("300")){ return true; } return false; }}<%@ 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>DWR page</title> <script type="text/javascript" src="<%=path%>/dwr/interface/UserService.js"></script> <script type="text/javascript" src="<%=path%>/dwr/engine.js"></script> <script type="text/javascript" src="<%=path%>/dwr/util.js"></script> <script type="text/javascript"> function hellodwr(){ var username = document.getElementById("username").value; var password = document.getElementById("password").value; alert(password); UserService.login(username,password,hellocallback); } function hellocallback(b){ if(b){ document.getElementById("div_login").innerHTML = "登录成功"; }else{ document.getElementById("div_login").innerHTML = "登录失败"; } } </script> </head> <body> <div id="div_login"> <form action="javascript:hellodwr()" method="post"> 用户名:<input type="text" id="username" /> 密码:<input type="password" id="password" /> <input type="submit" value="提交" /> </form> </div> </body></html>