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JSP第五次作业

1.教材P78 例4-9

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<%
    double price = 98.78;
%>
<p>
    商品编号A1001,价格8765
    <a href="receive.jsp?id=A1001&price=8765">购买</a><br>
    商品编号A1002,价格<%=price%>
    <a href="receive.jsp?id=A1002&price=<%=price%>">购买</a><br>
</p>
</body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<p>
    <%
        String id=request.getParameter("id");
        String price=request.getParameter("price");
    %>
    商品编号:<%=id%><br>
    商品价格:<%=price%><br>
</p>
</body>
</html>

2.教材P97 实验2

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <form action="computer.jsp" method="post" name=form>

            输入运算数,选择运算符号:<br>
            <input type="text" name="nub1" size="6">
            <select name="operator">
                <option value="+">加</option>
                <option value="-">减</option>
                <option value="*">乘</option>
                <option value="/">除</option>
            </select>
            <input type="text" name="num2" size="6"><br>
            <input type="submit" name="submit" value="提交">

    </form>
</body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <%
        String num1=request.getParameter("num1");
        String num2=request.getParameter("num2");
        String operator=request.getParameter("operator");
        if(num1==null||num1.length()==0){
            response.sendRedirect("input.jsp");
            return;
        }else if (num2==null||num2.length()==0){
            response.sendRedirect("input.jsp");
            return;
        }
        double a=Double.parseDouble(num1);
        double b=Double.parseDouble(num1);
        double r=0;
        try{

            if (operator.equals("+")){
                r=a+b;
            }else if (operator.equals("-")){
                r=a-b;
            }else if (operator.equals("*")){
                r=a*b;
            }else if (operator.equals("/")){
                r=a/b;
                out.print(a+operator+b+"="+r);
            }
        }catch (Exception e){
                out.print("请输入数字!");
        }
    %>
</body>
</html>

3.制作一个登陆表单，输入账号和密码，如果账号密码相同，跳转到“登录成功”页面，否则跳转到“登录失败”页面。（加上JS非空验证）（选做，加验证码）

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

        <%
            String account=request.getParameter("account");
            String psw=request.getParameter("psw");
            if (psw.equals(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>登陆成功</title>
</head>
<body>
<h1>登陆成功!</h1>
<h2>已成为会员!</h2>
</body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登陆失败</title>
</head>
<body>
<h1>登陆失败!</h1>
</body>
</html>

4.在上题的表单中增加一个checkbox,让用户选择“是否注册为会员"，如果注册为会员，则在显示时增加文本“欢迎您注册为会员

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登录</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="check.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>登陆成功</title>
</head>
<body>
<h1>登陆成功!</h1>
<h2>已成为会员!</h2>
</body>
</html>

5.在页面1的表单内输入一个数字N，提交，能够在另一个页面打印N个“欢迎”字符串

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <form action="wellcome.jsp" method="post">
        请输入欢迎个数:<input type="text" name="wellcome"><br>
        <input type="submit" value="提交">
    </form>
</body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>欢迎</title>
</head>
<body>
        <%
            String wellcome=request.getParameter("wellcome");
            int num=Integer.parseInt(wellcome);
            for (int i=1;i<=num;i++){
                out.println("欢迎");
            }
        %>
</body>
</html>

6.在页面1中输入账号和密码,进行登录，如果账号和密码相同，则认为成功登录到页面2,在页面2中显示一个文本框输入用户姓名,输入之后提交,在页面3中显示用户的账号和姓名。（转发）request.getRequestDispacher.....forward

<%@ 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>登陆成功!</h1>
<h2>已成为会员!</h2>
<form action="user.jsp" method="post">
    <input type="hidden" name="account" value="<%=account%>">
    请输入姓名:<input type="text" name="name"><br>
    <input type="submit" value="提交">
</form>
</body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<%
    String name=request.getParameter("name");
    String account=request.getParameter("account");
%>
<h1>欢迎!</h1>
<h2>
    您的账号:<%=account%>
    用户名:<%=name%>
</h2>
</body>
</html>