dwr进行页面推送简单实例_html/css_WEB-ITnose

1、web.xml 配置，在web.xml里面添加如下内容：

			DWR Servlet		dwr-invoker		org.directwebremoting.servlet.DwrServlet					debug			true											pollAndCometEnabled			true				1					dwr-invoker		/dwr/*	

              iwco.dwrs.SendMsg        

3、java类 SendMsg.java

package iwco.dwrs;import java.util.Collection;import org.directwebremoting.ScriptBuffer;import org.directwebremoting.ScriptSession;import org.directwebremoting.WebContext;import org.directwebremoting.WebContextFactory;import org.directwebremoting.proxy.dwr.Util;public class SendMsg {	 @SuppressWarnings("deprecation")  	    public void sendMsg(String msg){	        //得到上下文  	        WebContext contex = WebContextFactory.get();  	          	        //得到要推送到 的页面  dwr3为项目名称 ， 一定要加上。  	        Collection sessions = contex.getScriptSessionsByPage("/dwrTest/showMsg.jsp");	          	        //不知道该怎么解释这个 ，   	        Util util = new Util(sessions);	          	        //下面是创建一个javascript脚本 ， 相当于在页面脚本中添加了一句  show(msg);   	        ScriptBuffer sb = new ScriptBuffer();  	        sb.appendScript("show(");  	        sb.appendData(msg);  	        sb.appendScript(")");  	          	        //推送  	        util.addScript(sb);  	    }  }

sendMsg.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>          			    				

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>