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));
}