logoffaction.java

这其中有好多例题的

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.wings.struts.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import persistence.Constants;

import com.wings.struts.form.LogonForm;

/** 
 * MyEclipse Struts
 * Creation date: 04-13-2007
 * 
 * XDoclet definition:
 * @struts.action validate="true"
 */
public class LogoffAction extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		HttpSession session = request.getSession();
		LogonForm user = (LogonForm)session.getAttribute(Constants.USER_KEY);
		
		if(user!=null){
			if(servlet.getDebug()>=Constants.DEBUG){
				StringBuffer message = new StringBuffer("LogoffAction: User '");
				message.append(user.getUsername());
				message.append("' logged off in session ");
				message.append(session.getId());
				servlet.log(message.toString());
			}
		}
		else{
			if(servlet.getDebug()>=Constants.DEBUG){
				StringBuffer message = new StringBuffer("LogoffAcion: User '");
				message.append(session.getId());
				servlet.log(message.toString());
			}
		}
		session.removeAttribute(Constants.USER_KEY);
		return mapping.findForward(Constants.SUCCESS);
	}
}