jsp第八周作业 

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML >
<html>
<head>
    <title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<%
    session.invalidate();
    response.sendRedirect("login.jsp");
%>
</body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML >
<html>
<head>
    <title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<script>
    function yz() {
        if (form.user.value == "") {
            alert('用户名不能为空');
            return;
        }
        if (form.password.value == "") {
            alert('密码不能为空');
            return;
        }
        form.submit();
    }
</script>
<form action="index.jsp" method="post" name="form">
    <table>
        <tr>
            <td>用户名：</td>
            <td><input type="text" name="user"></td>
        </tr>
        <tr>
            <td>密码：</td>
            <td><input type="password" name="password"></td>
        </tr>
        <tr>
            <td><input type="button" value="登录" onclick="yz()"></td>
        </tr>
    </table>
</form>
</body>
</html>

 

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML >
<html>
<head>
    <title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<%
    String user = (String) session.getAttribute("user");
    if (user == null) {
        response.sendRedirect("login.jsp");
    }
%>
欢迎：<%=user%>
<a href="out.jsp">退出登录</a>
<form action="cart.jsp" method="post">
    商品：<br> <br>
    衣服<input type="checkbox" name="item" value="yifu">加入购物车 <br>
    裤子<input type="checkbox" name="item" value="kuzi">加入购物车 <br>
    鞋子<input type="checkbox" name="item" value="xiezi">加入购物车<br><br>
    <input type="submit" value="加入购物车">
</form>
</body>
</html>

 

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML >
<html>
<head>
    <title>显示购物车</title>
</head>
<body>
<%
    request.setCharacterEncoding("utf-8");
    String[] sp = request.getParameterValues("sp");
    for (int i = 0; sp != null && i < sp.length; i++) {
        out.print(sp[i] + "<br>");
    }
%>
</body>
</html>

 

 

posted on 2022-04-26 13:51  chenyulin11  阅读(5)  评论(0)  编辑  收藏  举报

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