用session对象实现用户登录

index.jsp

    

        username:

        password:

        

        
    

deal.jsp

    <%
    String[][] userList={{"ly","123"},{"tz","456"}};//保存用户列表
    boolean flag=false;//登陆状态
    request.setCharacterEncoding("utf-8");
    String username = request.getParameter("username");
    String pwd=request.getParameter("pwd");
    for(int i=0;i

main.jsp

    <%String username=(String)session.getAttribute("username"); %>
    您好！[<%=username %>],欢迎访问！

    [退出]

exit.jsp

    <%
    session.invalidate();//销毁session
    response.sendRedirect("index.jsp");//重定向页面
    %>

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