第八周作业

1.登陆
输入用户名密码,判断用户名和密码相同,登陆成功,session中保存用户的用户名,进入主页main.jsp,主页有一个退出按钮,点击,回到登陆页login.jsp。要求:退出登录后,如果在浏览器直接输入主页main.jsp,访问不了,直接跳到登陆页、

2.购物车
和上一题一起,在main.jsp中做一个购物车,里面显示3个商品名和价格 每一个后面有一个加入购物车按钮,main.jsp中有一个按钮(或者超链接)可以显示购物车。(选作:在购物车中加删除按钮删除商品)

 
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
  <title></title>
</head>
<body>

<%
  String account=request.getParameter("account");
  String psw=request.getParameter("psw");
  if (psw.equals(account)){
    session.setAttribute("account",account);
    request.getRequestDispatcher("logSuccess.jsp").forward(request,response);
  }else {
    request.getRequestDispatcher("logFail.jsp").forward(request,response);
  }
%>

</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title></title>
</head>
<body>
<h1>登陆失败!</h1>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title></title>
</head>
<body>
<script type="text/javascript">
    function check() {
        if (login.account.value==""){
            alert("请输入账号!");
            return;
        }else if(login.psw.value=="") {
            alert("请输入密码!");
            return;
        }
        login.submit();
    }
</script>
<form action="login.jsp" method="post" name="login">
    账号:<input type="text" name="account"><br>
    密码:<input type="password" name="psw"><br>
    <input type="checkbox" value="注册会员">注册会员
    <input type="checkbox" value="不注册会员">不注册会员<br>
    <input type="button" value="登录" onclick="check()">
</form>
<%

%>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title></title>
</head>
<body>
<h1>退出成功!3秒后回到主页!</h1>
<%

    session.invalidate();
    response.setHeader("refresh", "3;url=login.jsp");

%>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title></title>
</head>
<body>
<script type="text/javascript">
    function inCart() {
        alert("加入购物车成功!")
        <%
        String[] toyName=request.getParameterValues("toys");
        session.setAttribute("toyName",toyName);
        %>
        select.submit();
    }
</script>
<%
    String account =(String) session.getAttribute("account");
    if (account == null) {
        out.print("请登录!3秒后跳转");
        response.setHeader("refresh", "3;url=login.jsp");
    } else {%>
<h1>登陆成功!</h1>
<h1>欢迎!<%=session.getAttribute("account")%>
</h1>
<h2>已成为会员!</h2><br>
<form action="logOut.jsp" method="post">
    <input type="hidden" name="account" value="<%=account%>">
    <input type="submit" value="查看我的物车"><br>
</form>

<h2>商品名:</h2>
<form action="dddl.jsp" method="post" name="select">
    玉米(aa):¥5<input type="checkbox" name="toys" value="aa"><br>
    西瓜(bb):¥20<input type="checkbox" name="toys" value="bb"><br>
    苹果(cc):¥3<input type="checkbox" name="toys" value="cc"><br>
    <input type="button" value="加入购物车" onclick="inCart()">
</form>
<a href="logSuccess.jsp"></a>
<% }%>


</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登陆成功</title>
</head>
<body>
<%
    String account=request.getParameter("account");
%>
<h1></h1>
<h2>
    您的账号:<%=account%><br>
    购物车:<br>
    <%
        request.setCharacterEncoding("utf-8");
        String[] toy=(String[]) session.getAttribute("toyName");
        if (toy==null){
            out.print("购物车为空!");
        }else {
            out.println(Arrays.toString(toy));
        }

    %>
</h2>
</body>
</html>

 

 

 

 

posted @ 2022-04-24 14:32  王磊1  阅读(7)  评论(0编辑  收藏  举报