Beispiel #1
0
	public void loginRoom(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
		response.setContentType("text/html;charset=UTF-8");
		HttpSession session = request.getSession();
		String username=request.getParameter("username");	//获得登录用户名
		UserInfo user=UserInfo.getInstance();		//获得UserInfo类的对象
		session.setMaxInactiveInterval(600);		//设置Session的过期时间为10分钟
		Vector vector=user.getList();
		boolean flag=true;		//标记是否登录的变量
		//判断用户是否登录
		System.out.println("vector的size:"+vector.size());
		if(vector!=null&&vector.size()>0){
			for(int i=0;i<vector.size();i++){
				System.out.println("vector"+i+":"+vector.elementAt(i)+" user:"******"<script language='javascript'>alert('该用户已经登录');window.location.href='index.jsp';</script>");
					} catch (IOException e) {
						e.printStackTrace();
					}
					flag=false;
					break;
				}
			}
		}
		//保存用户信息
		if(flag){
			UserListener ul=new UserListener();					//创建UserListener的对象
			ul.setUser(username);								//添加用户
			user.addUser(ul.getUser());							//添加用户到UserInfo类的对象中
			session.setAttribute("user",ul);						//将UserListener对象绑定到Session中
			session.setAttribute("username",username);	//保存当前登录的用户名
			session.setAttribute("loginTime",new Date().toLocaleString());		//保存登录时间
        ServletContext application=getServletContext();

        String sourceMessage="";

        if(null!=application.getAttribute("message")){
            sourceMessage=application.getAttribute("message").toString();
        }
        sourceMessage+="系统公告:<font color='gray'>" + username + "走进了聊天室!</font><br>";
        application.setAttribute("message",sourceMessage);
        try {
            request.getRequestDispatcher("login_ok.jsp").forward(request, response);
        } catch (Exception ex) {
            Logger.getLogger(Messages.class.getName()).log(Level.SEVERE, null, ex);
        }
		}
	}
 /** Set the session timeout */
 protected void setSessionTimeout(HttpSession session, long time) {
   session.setMaxInactiveInterval((int) (time / Constants.SECOND));
 }