postion.java

一个不错的bbs论坛系统．对初学者很有帮助

package com.yhbbs.user.online;

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

import com.yhbbs.user.bean.OsBrowser;
import com.yhbbs.user.bean.UserSessionIm;
import com.yhbbs.user.itface.bean.UserSession;
import com.yhbbs.utils.Constants;
import com.yhbbs.utils.DateUtils;

/**
 * <p>Title:论坛在线用户位置相关操作</p>
 * <li> 论坛在线用户位置相关操作 <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 Postion {

	/** 设置在线用户的位置
	 * @param request 一个请求
	 * @param postion 目前位置
	 * @param forumId 论坛ID
	 * 
	 */
	public static void ChangPost(HttpServletRequest request,String postion,int forumId){
		UserSession onlinesess = getUserSess(request);
		onlinesess.setActivetime(DateUtils.getCurFormatDate("yyyy-MM-dd HH:mm:ss"));
		onlinesess.setPostion(postion);
		onlinesess.setForumid(forumId);
	}
	
	/** 设置在线用户的位置
	 * @param request 一个请求
	 * @param postion 目前位置
	 * 
	 */
	public static void ChangPost(HttpServletRequest request,String postion){
		UserSession onlinesess = getUserSess(request);
		if(onlinesess!=null){
			onlinesess.setActivetime(DateUtils.getCurFormatDate("yyyy-MM-dd HH:mm:ss"));
			onlinesess.setPostion(postion);
		}
	}
	
	/** 返回当前session里是guest还是登录用户
	 * @param request 一个请求
	 * @return UserSession 在线用户
	 */
	public static UserSession getUserSess(HttpServletRequest request){
		HttpSession session =  request.getSession(true);
		UserSession user = (UserSession) session.getAttribute(Constants.bbsguest);
		if(user==null){
			user = (UserSession) session.getAttribute(Constants.bbsuser);
			if(user==null){
				  user = new UserSessionIm();
				  user.setUserId(0);
		   		  user.setUsername("游客");
		   		  user.setUsertype(0);
		   		  user.setActivetime(DateUtils.getCurFormatDate("yyyy-MM-dd HH:mm:ss"));
		   		  user.setLogintime(DateUtils.getCurFormatDate("yyyy-MM-dd HH:mm:ss"));
		   		  user.setPostion("论坛");
		   		  user.setBrowser(OsBrowser.getUserBrowser(request.getHeader("User-Agent")));
		   		  user.setOs(OsBrowser.getUserOs(request.getHeader("User-Agent")));
		   		  user.setIp(request.getRemoteAddr());
		   		  session.setAttribute(Constants.bbsguest,user);
			}
		}
		
		return user;
	}
}