logoutaction.java

一个不错的bbs论坛系统．对初学者很有帮助

package com.yhbbs.user.action;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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 org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import com.yhbbs.user.biz.SessionBiz;
import com.yhbbs.user.biz.UserBiz;
import com.yhbbs.user.itface.bean.UserSession;
import com.yhbbs.utils.Constants;
/**
 * <p>Title:论坛用户退出Action</p>
 * <li>	用户退出，将其从在线用户列表删除同时更新改用户相关信息
 * <li>	处理成功或失败后分别跳转到相关页面并提示相关信息和操作<br>
 * <br><b>WebSite: www.yyhweb.com</b>
 * <br><b>CopyRight: yyhweb[由由华网]</b>
 * @author stephen
 * @version YHBBS-2.0
 */
public class LogoutAction extends Action {
	public ActionForward execute(ActionMapping mapping,ActionForm form,
			  HttpServletRequest request,HttpServletResponse response) {
		ActionMessages errors = new ActionMessages();
		UserSession curUser = (UserSession) request.getSession(true).getAttribute(Constants.bbsuser);
		if(curUser!=null){
			Cookie[] cks = request.getCookies();
			if(cks!=null){
				for(int i=0;i<cks.length;i++){
					Cookie ck = cks[i];
					if(ck.getName().equalsIgnoreCase(Constants.cookiename)){
						ck.setValue("");
						ck.setMaxAge(0);
						response.addCookie(ck);
					}
				}
			}
			UserBiz.userLogout(curUser.getUserId());
			SessionBiz.userLogout(request);
			return mapping.findForward("Success");
		}else{
			errors.add("logout.error",new ActionMessage("logout.error"));
			saveErrors(request,errors);
			return mapping.findForward("Failure");
		}
		
	}
}