how to use Session in a jsp function?

[karen]

hello,just as you say,to use out.println() method,we need to add like this
func(JspWriter out)
{
}
if I want to use a Session method,just as session.putValue() or  
session.getValue(),how can I realize?and more if I can call a bean in a jsp 
function?just like below:

<jsp:useBean id="chk" scope="page" class="Alpine.chkBean" />
<%!
 int chkID(String strBar)
 {
     Session session;
     String strID=""+session.getValue("ID");
     String strPassword=""+session.getValue("Password");
     int flag;
     flag=chk.chkID(strID,strPassword,strBar);
     if(flag==1)
        return 1;
     else
        return 0;

 }%>

Thanks a lot!

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