Question

我正在使用servlet建立我的网站并在发布会话时遇到问题，请检查并找出错误：

login.java :
     ResultSet res=smt.executeQuery("Select * from admin where name='"+user+"' and password='"+password+"'");
    while(res.next())
    {
        String name=res.getString("name");
        String pwd=res.getString("password");
    if(category.equals("Admin"))
    {
        if(name.equals(user) && pwd.equals(password))
        {
                           ServletContext context=request.getServletContext();
                           context.setAttribute("name", name);
                            HttpSession session=request.getSession();
            session.setAttribute("name", name);
            RequestDispatcher view=request.getRequestDispatcher("welcome_admin.jsp");
            view.forward(request, response);
        }
        else
        {
            response.sendRedirect("index.jsp");
        }
    }

并且logout.jsp是：

   <body>
    <%

    session.removeAttribute("name");

    session.invalidate();



    %>
    <b>
        <%
        RequestDispatcher rd=request.getRequestDispatcher("index.jsp");
        rd.include(request, response);
        %>
    </b >
</body>

但会话未发布，如果我点击后退按钮，它会再次将我重定向到页面！有人帮帮我!!

Answer 1

这是因为您的浏览器缓存了该页面，它不再来自服务器，您需要instruct your browser not to cache pages by adding a Filter

Answer 2

问题在于缓存。

解决方法是将其添加到您的servlet：

Java servlet how to disable caching of page

// Set standard HTTP/1.1 no-cache headers.
response.setHeader("Cache-Control", "private, no-store, no-cache, must-revalidate");

// Set standard HTTP/1.0 no-cache header.
response.setHeader("Pragma", "no-cache");

会话未在servlet中发布

2 个答案: