DWR框架应用实践-优快云博客

首先是配置web.xml

<?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">
	

  <!-- 配置DWR框架的Servlet -->	
  <servlet>
  	<servlet-name>dwrServlet</servlet-name>
  	<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
  </servlet>
  
  <servlet-mapping>
  	<servlet-name>dwrServlet</servlet-name>
  	<url-pattern>/dwr/*</url-pattern>
  </servlet-mapping>
	
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

配置dur.xml 和web.xml同级目录

<?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>
	<!--  配置客户端JS与JAVA类之间的关联关系   -->
	<allow>
		<!-- javascript="user":表示在客户端生成JS的文件名字    
		 	 creator:如果为new  表示当前的类是通过new来实例的 
		 	 如果为spring：表示当前的JAVA类引用spring中的bean -->
		<create javascript="user" creator="new">
			 <!-- param:类的路径配置 
				  name:为class的表示配置类路径 （creator="new"）
		    	  如果creator="spring" name为beanName  -->
			<param name="class" value="cn.com.wlz.server.UserServer">
			</param>
			<!-- 可以被客户端调用 的JAVA类中的方法 
			<include method="isUser,"/>-->
			<!-- 不可以被客户端调用 的JAVA类中的方法 
			<exclude method=""/> -->
		</create>
		<!-- 把JS中的对像转换成对应的JAVA对像
		 match:JAVA类路径   converter="bean":告诉DWR
	  	框架，如果是对像的话，自动进行转换 -->
	  	<convert match="cn.com.wlz.vo.User" converter="bean"></convert>
	</allow>
</dwr>

jsp:

<%@ 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">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
	
	<!-- 导入DWR框架运行的JS文件 -->
	<script type="text/javascript" src="dwr/engine.js"></script>
	<script type="text/javascript" src="dwr/util.js"></script>
	
	<!--  导入DWR框架动态生成的JS   调用dwr.xml中通过create javascript设置的JS名字 -->
	<script type="text/javascript" src="dwr/interface/user.js"></script>
	
	
	
  </head>
  
  
   <script>
		
		//验证用户
		function isUser( value ){
  		
  			alert( value );
  			//通过JS调用JAVA类中的方法  最后一个参数为回调函数，获取返回的值
  			user.isUser( value,function(data){
  				alert(data);
  			});
  		}
  		
  		//注册
  	   function register( ){
  	   		
  	   		var user1 = {};
  	   		user1.username = DWRUtil.getValue( "username" );
  	   		user1.password = DWRUtil.getValue( "password" );
  	   		alert( user1.username+user1.password );
  	   		user.register( user1,function(data){
  	   		
  	   			alert(data);
  	   		} ); 
  	   		
  			//alert( "register" );
  		}
	
	</script>
	
  
  <body><center>

   		用户名：<input  name="username" οnblur="isUser(this.value)" /><br>
   		密码：<input name="password" /><br>
   		<input type="button" name="register" οnclick="register()" value="register"/>
  </body>
</html>

java类：

package cn.com.wlz.server;

import cn.com.wlz.vo.User;

/**
 * 
 * title:用户Server
 * @author Administrator
 *
 */

public class UserServer {
	
	//判断用户是否可用
	public int isUser( String name ){
		
		System.out.println( "name:"+name );
		if(name.equals( "wlz" ))
			return 1;
		return 0;
	}
	
	//用户注册
	public int register( User user ){
		
		System.out.println( "username:"+user.getUsername()+"password:"+user.getPassword());
		if( user.getUsername().equals( "wlz" ) )
			return 0;
		return 1;
	}

}


package cn.com.wlz.vo;


public class User {
	
	private String username;
	private String password;
	
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}

}

JS调用Java