📄 hidden.jsp

📁 《jsp网站开发技术》中的源代码(清华大学出版社)

💻 JSP

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<HTML>
<HEAD>
<%@ page session="true" %>
<%@ page contentType="text/html;charset=gb2312" %> 
<%@page errorPage="err.jsp"%>
<META http-equiv="refresh" content="5">
<script language="JavaScript">
 function scrollchange() 
 {
    parent.mainFrame.window.scroll(0,60000);
	parent.mainFrame.document.bgColor="#ffffff";
    return true;
 }
</script>
<TITLE>
outputMessage
</TITLE>
</HEAD>
<jsp:useBean id="reg" scope="page" class="chat.ChatBean" />
<BODY onload="scrollchange()" bgcolor="#FFFFFF">
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%@ page import="javax.servlet.*" %> 
<%@ page import="javax.servlet.http.*" %>
<%@page import="chat.*" %> 
<FORM method="post">  
<%    
      String Name =(String)session.getValue("name");
      if(Name==null)
      {
      	session.putValue("message","Please Login First!");
      %>
      <script language="javascript">
      parent.location="intoT.jsp";
      </script>
     <%}
      Integer MessageIndex =(Integer)session.getValue("MessageIndex");    
      if((MessageIndex==null )||( MessageIndex.intValue() >= 200 ))
      {
      	MessageIndex=new Integer(0);
      }     
    synchronized(application)
    {  
        Vector DisplayMessage=null;   
        DisplayMessage =(Vector)application.getAttribute("Message"); 
        if(DisplayMessage!=null)
	{  
	    	if(DisplayMessage.size()< MessageIndex.intValue())
		 {
			MessageIndex=new Integer(DisplayMessage.size());
		 }
	   	if(MessageIndex.intValue()!= DisplayMessage.size())
	   	{
	    		Object obj;
	    		String msg;
	    		int i=MessageIndex.intValue();
	    		for(;i<DisplayMessage.size();i++)
           		{
           			obj=DisplayMessage.elementAt(i);
           			if(obj instanceof ChatMessage)
           			{
           				msg=((ChatMessage)obj).toHTML(Name);
           			}
           			else{
           			 msg="<font color=gray>System info:"+obj.toString()+"</font><br>";
           			}%>
           			<script language="javascript">
           			parent.mainFrame.document.write("<%=msg%>");
           			</script>
           		<%} //for
           		Integer count=new Integer(i);
           		session.putValue("MessageIndex",count);
           	}//if
          }//if
  }//sync
%>
</form>
</body>
</html>

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