Thoroughly get JSP online number

Thoroughly get JSP online number

** This is a class that manages user information.

File name onlineuser.java

Welcome to Javajia home (http://www.javajia.com), made by Yuking. 2001.1.1

* /

Import javax.servlet.http. *;

Import javax.servlet. *;

Import java.util. *;

Public class onlineuser imports httpsessionBindingListener {

Public onlineuser () {

}

PRIVATE VECTOR USERS = New Vector ();

Public int getCount () {

Users.trimtosize ();

Return Users.capacity ();

}

Public Boolean Existuser (String UserName) {

Users.trimtosize ();

Boolean EXISTUSER = FALSE;

For (int i = 0; i

{

IF (username.equals ((String) Users.get (i))))

{

Existuser = true;

Break;

}

}

Return EXISTUSER;

}

Public Boolean Deleteuser (String Username) {

Users.trimtosize ();

IF (Existuser (username) {

INT CurruserIndex = -1;

For (int i = 0; i

IF (username.equals ((String) Users.get (i))))) {

CurruserIndex = i;

Break;

}

}

IF (CurruserIndex! = - 1) {

Users.Remove (CurruserIndex);

Users.trimtosize ();

Return True;

}

}

Return False;

}

Public Vector getonlineuser ()

{

Return User;

}

Public void valuebound (httpsessionBindingEvent e) {

Users.trimtosize ();

IF (! E.GETNAME ())) {

Users.Add (E.GETNAME ());

System.out.print (E.GetName () "/ T Login to System / T" (New Date ()));

System.out.println ("Online User is:" getCount ());

Else

System.out.println (E.GetName () "already exists");

}

Public void valueunbound (httpsessionBindingEvent e) {

Users.trimtosize ();

String username = E.GETNAME ();

Deleteuser (UserName);

System.out.print (username "/ t exit system / T" (new date ()));

System.out.println ("Online User is:" getCount ());

}

}

/

<%

/ ** This is a JSP file displaying online users

File name onlineUser.jsp

Welcome to Javajia home (http://www.javajia.com), made by Yuking. 2001.1.1 * /

%>

<% @ Page ContentType = "text / html; charset = GB2312"%>

<% @ Page Import = "Onlineuser, Java.util. *"%>