pushlet点对点单播，在网上看 ，大家都是将包修改然后替换lib中class，其实不用不这么麻烦，java可以继承嘛，继承原来的类重写里面的方法就行，不必编译出来替换class，这样不方便修改

新建一个类，继承nl.justobjects.pushlet.core.SessionManager类，重写里面的createSession方法即可

package com.pushlet.serveToClient;import javax.servlet.http.HttpSession;import org.apache.struts2.ServletActionContext;import nl.justobjects.pushlet.core.Event;import nl.justobjects.pushlet.core.Session;import nl.justobjects.pushlet.core.SessionManager;import nl.justobjects.pushlet.util.PushletException;public class MySessionManager extends SessionManager {	@Override	public Session createSession(Event anEvent) throws PushletException {		// TODO Auto-generated method stub		HttpSession s = ServletActionContext.getRequest().getSession();		String userid=s.getAttribute("userid")+"";		return Session.create(userid);	}}

然后修改配置pushlet.properties这个配置文件

然后调用方法推送

   Event event =Event.createDataEvent("/mutiSend");
   event.setField("msg", URLEncoder.encode(remindContent+"<br/>推送时间:"+new Date().toLocaleString(),"UTF-8"));
   Dispatcher.getInstance().unicast(event, "muyunfei");