欢迎zhuzhu9230我的：收件箱资源博客空间设置|帮助|退出
CSDN首页资讯论坛博客下载搜索更多CTO俱乐部学生大本营培训充电移动开发软件研发云计算程序员ITeye<> TUP
CSDN-CSDN社区-Web 开发-应用服务器
管理菜单
生成帖子置顶取消置顶推荐取消推荐锁定解锁移动编辑删除帖子加分帖子高亮取消高亮结 帖发 帖回 复收藏 不显示删除回复显示所有回复显示星级回复显示得分回复 使用session监听实现想要显示在线人数的功能，可是只有第一次用户登录的时候session里面的数值才会加1，换了别的用户都不进session了，为什么。[问题点数:40分]
zhuzhu923
(zhuzhu923)
等 级：
结帖率：0.00%
楼主发表于：2012-07-04 22:22:21//下面是监听器代码
public class LoginListener implements HttpSessionListener {
private static int count;
public static int get(){
return count;
}
public LoginListener() {
// TODO Auto-generated constructor stub
}
public void sessionCreated(HttpSessionEvent arg0) {
count++;
}
public void sessionDestroyed(HttpSessionEvent arg0) {
count--;
}
}
//这个是首页登录的html
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form method="post" action="../DoLogin.do">
用户名：<input type="text" name="name"><br>
密码：<input type="password" name="passwd"><br>
<input type="submit" name="sub" value="提交">
</form>
</body>
</html>
//这个是提交的action
public class DoLogin extends HttpServlet {
private Map<String,String> map;
public DoLogin() {
map=new HashMap<String,String>();
map.put("xiao", "1");
map.put("xiao1", "12");
map.put("xiaozhu", "123");
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name = request.getParameter("name");
String passwd = request.getParameter("passwd");
if(map.containsKey(name)&&map.get(name).equals(passwd)){
request.getSession().setAttribute("user", name);
request.getRequestDispatcher("/success.view").forward(request, response);
}
else{
response.sendRedirect("LoginListener/index");
}
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
//这个是登录成功之后转到的界面
public class LoginSuccess extends HttpServlet {
/**
* Constructor of the object.
*/
public LoginSuccess() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
public void success(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException{
response.setContentType("text/html;charset=utf-8");
String user = (String) request.getSession().getAttribute("user");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>显示用户登录次数</TITLE></HEAD>");
out.println(" <BODY>");
out.println("用户名："+user+"");
out.println("登录次数"+LoginListener.get());
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)