messagefresh.java

JSP+AJAX开发的聊天室(毕业设计)

package org.yeeku.refresh;

import org.directwebremoting.WebContext;    
import org.directwebremoting.WebContextFactory;
import java.util.*;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;
public class Messagefresh
  {
       
	public  List execute() throws Exception
	{
           WebContext ctx;
           ctx=WebContextFactory.get();   
           HttpSession session =ctx.getSession();
           String UserName=(String)session.getAttribute("username");
           ServletContext M_application=ctx.getServletContext();
           List Messagelist;
	   Messagelist=(List)M_application.getAttribute("chatmsg");
          if(Messagelist==null)
            {
              String Nomessage="No Message";
              Messagelist.add(Nomessage);
             }     
          return Messagelist;
        }
       
 }