各种Ajax UI 很多很漂亮的代码

package com.ui.action; import java.util.Locale; import javax.servlet.http.HttpSessionBindingListener; import javax.servlet.http.HttpSessionBindingEvent; /** * Used to store information about a specific user. This class is used * so that the information is not scattered throughout the HttpSession. * Only this object is stored in the session for the user. This class * implements the HttpSessionBindingListener interface so that it can * be notified of session timeout and perform the proper cleanup. */ public class SessionContainer implements HttpSessionBindingListener { // Data about the user that is cached private UserDomain userDomain = null; /** * The Locale object for the user. Although Struts stores a Locale for * each user in the session, the locale is also maintained here. */ private Locale locale; /** * Default Constructor */ public SessionContainer() { super(); initialize(); } /** * The container calls this method when it is being unbound from the * session. */ public void valueUnbound(HttpSessionBindingEvent event) { // Perform resource cleanup System.out.println("Being unbound..."); cleanUp(); } /** * Set the locale for the user. */ public void setLocale(Locale aLocale) { locale = aLocale; } /** * Retrieve the locale for the user. */ public Locale getLocale() { return locale; } /** * The container calls this method when it is being bound to the * session. */ public void valueBound(HttpSessionBindingEvent event) { // Don't need to do anything, but still have to implement the // interface method. } /** * Initialize all of the required resources */ private void initialize() { // Create a new Shopping cart for this user } /** * Clean up any open resources. The shopping cart is left intact * intentionally. */ public void cleanUp() { setUserDomain(null); } public UserDomain getUserDomain() { return userDomain; } public void setUserDomain(UserDomain userDomain) { this.userDomain = userDomain; } }