Jsp第六次作业

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。

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
  <head>
    <title>first</title>
  </head>  
  <body>
  <script type="text/javascript">
  function check(){
  if(login.account.value=="")
  {
  alert("请输入账号");
  return;
  }
  else if(login.password.value=="")
  {
  alert("请输入密码");
  return;
  }
  login.submit();
  }</script>
  <h3>登录</h3>
    <form action="check.jsp">
    账号：<input type="text" name="account"><br>
    密码：<input type="password" name="password"><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="submit" value="登录">
    </form>
    <% %>
  </body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>check</title>

  </head>
  
  <body><%
  String account=request.getParameter("account");
  String password=request.getParameter("password");
  if(password.equals(account)){
  session.setAttribute("account",account);
  request.getRequestDispatcher("Login3.jsp").forward(request,response) ;}
  else{
  request.getRequestDispatcher("login2.jsp").forward(request,response);
  }%>
    <br>
  </body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<html>
<head>
    <title>登陆成功</title>
</head>
<body>
<h2>登录成功</h2>
<a href="LoginOut.jsp">退出登录</a>

</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
    <title>登陆失败</title>
</head>
<body>
<h1>登陆失败!</h1>
</body>
</html>

 

 

 

 

 

 

 

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 language="java" import="java.util.*" pageEncoding="utf-8"%>

<html>
<head>
    <title>登陆成功</title>
</head>
<body>
<script type="text/javascript">
    function inCart() {
        alert("加入购物车成功!")
        <%
        String[] fruitName=request.getParameterValues("fruit");
        session.setAttribute("fruitName",fruitName);
        %>
        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="user.jsp" method="post">
    <input type="hidden" name="account" value="<%=account%>">
    <input type="submit" value="查看我都购物车"><br>
</form>

<h2>商品名:</h2>
<form action="Login1.jsp" method="post" name="select">
橙子(orange):￥4<input type="checkbox" name="fruits" value="orange"><br>
香蕉(banana):￥6<input type="checkbox" name="fruits" value="banana"><br>
苹果(apple):￥5<input type="checkbox" name="fruits" value="apple"><br>
<input type="button" value="加入购物车" onclick="inCart()">
</form>
<a href="LoginOut.jsp">退出登录</a>
<% }%>


</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
    String account=request.getParameter("account");
%>
<h1>欢迎!</h1>
<h2>
    您的账号:<%=account%><br>
    购物车:<br>
    <%
        request.setCharacterEncoding("utf-8");
        String[] fruit=(String[]) session.getAttribute("fruitName");
        if (fruit==null){
            out.print("您的购物车没有东西!");
        }else {
            out.println(Arrays.toString(fruit));
        }

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

 

 

 

 

posted @ 2022-04-23 18:02  计算机1904谢家俊  阅读(32)  评论(0)  编辑  收藏  举报