package com.newegg.shopping.util.listener;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
public class LoggedUserCounter implements HttpSessionListener, HttpSessionAttributeListener {
private static int count = 0;
public void sessionCreated(HttpSessionEvent event) {
System.out.println("------------session created!");
}
public void sessionDestroyed(HttpSessionEvent event) {
}
public void attributeAdded(HttpSessionBindingEvent event) {
if(event.getName().equals("admin") && ((String)event.getValue()).equals("admin")) {
count ++;
System.out.println("a user logged in ! now total :" + count);
}
}
public void attributeRemoved(HttpSessionBindingEvent arg0) {
}
public void attributeReplaced(HttpSessionBindingEvent arg0) {
}
}
可折叠代码块package com.newegg.shopping.util.listener;
import javax.servlet.http.HttpSessionAttributeListener;
import javax.servlet.http.HttpSessionBindingEvent;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;
public class LoggedUserCounter implements HttpSessionListener, HttpSessionAttributeListener {
private static int count = 0;
public void sessionCreated(HttpSessionEvent event) {
System.out.println("------------session created!");
}
public void sessionDestroyed(HttpSessionEvent event) {
}
public void attributeAdded(HttpSessionBindingEvent event) {
if(event.getName().equals("admin") && ((String)event.getValue()).equals("admin")) {
count ++;
System.out.println("a user logged in ! now total :" + count);
}
}
public void attributeRemoved(HttpSessionBindingEvent arg0) {
}
public void attributeReplaced(HttpSessionBindingEvent arg0) {
}
}
