JSP第七次 作业
1.教材P78-79 例4-9
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title></title> </head> <body> <% double price=98.78; %> 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> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title></title> </head> <body> <p style="font-family: :宋体;font-size: 36;color:blue"> <% request.setCharacterEncoding("utf-8"); String id=request.getParameter("id"); String price=request.getParameter("price"); %> <b>商品编号：<%=id %><br> 商品价格：<%=price %> </p> </body> </html>
2.教材P97 实验2
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title></title> </head> <body> <form action="counter.jsp" method="post"> 输入运算数，选择运输符号：<br> <input type="text" name="num1" size="5"/> <select name="sel"> <option selected="selected" value="+">加</option> <option value="-">减</option> <option value="*">乘</option> <option value="/">除</option> </select> <input type="text" name="num2" size="5"/><br> <input type="submit" name="submit" value="提交"/> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title></title> </head> <body> <% request.setCharacterEncoding("utf-8"); String num1 = request.getParameter("num1"); String num2 = request.getParameter("num2"); String sel = request.getParameter("sel"); if (num1 == null || num1.length() == 0) { response.sendRedirect("input.jsp"); return; } else if (num2 == null || num2.length() == 0) { response.sendRedirect("input.jsp"); return; } try { double n1 = Double.parseDouble(num1); double n2 = Double.parseDouble(num2); double s = 0; if (sel.equals("+")) s = n1 + n2; else if (sel.equals("-")) s = n1 - n2; else if (sel.equals("*")) s = n1 * n2; else if (sel.equals("/")) s = n1 / n2; out.print(n1 + "" + sel + "" + n2 + "=" + s); } catch (Exception e) { out.print("输入错误"); } %> </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 language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title></title> </head> <body> <% char shu[]={'0','1','2','3','4','5','6','7','8','9'}; String ma=""; for(int i=0;i<4;i++){ ma=ma+shu[(int)(Math.random()*10)]; } %> <form action="2.jsp" method="post" name="a"> 请输入账号： <input name="name" type="text"/><br/> 请输入密码： <input name="password" type="password"/><br/> 请输入验证码：<input name="number" type="text"/> <input type="text" readonly="readonly" name="yzm" value="<%=ma%>"/> <input type="hidden" name="yzm" value="<%=ma%>"/><br/> <input type="button" value="登录" onclick="login()"/> <script type="text/javascript"> function login(){ if(a.name.value==""){ alert("账号不能为空！"); return; } if(a.password.value==""){ alert("密码不能为空！"); return; } if(a.number.value==""){ alert("验证码不能为空！"); return; } a.submit(); } </script> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>2.jsp</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String name=request.getParameter("name"); String password=request.getParameter("password"); String number=request.getParameter("number"); String yzm=request.getParameter("yzm"); if(name.equals(password)&&number.equals(yzm)){ request.getRequestDispatcher("3.jsp").forward(request, response); }else{ request.getRequestDispatcher("4.jsp").forward(request, response); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>3.jsp</title>
</head>
<body>
<h3>登陆成功！</h3>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>4.jsp</title>
</head>
<body>
<h3>登陆失败！</h3>
</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 language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title></title> </head> <body> <% char shu[]={'0','1','2','3','4','5','6','7','8','9'}; String ma=""; for(int i=0;i<4;i++){ ma=ma+shu[(int)(Math.random()*10)]; } %> <form action="2.jsp" method="post" name="a"> 请输入账号： <input name="name" type="text"/><br/> 请输入密码： <input name="password" type="password"/><br/> 请输入验证码：<input name="number" type="text"/> <input type="text" readonly="readonly" name="yzm" value="<%=ma%>"/> <input type="hidden" name="yzm" value="<%=ma%>"/><br/> 是否注册会员： <input type="radio" name="huiyuan" value="yes">是 <input type="radio" name="huiyuan" value="no">否<br> <input type="button" value="登录" onclick="login()"/> <script type="text/javascript"> function login(){ if(a.name.value==""){ alert("账号不能为空！"); return; } if(a.password.value==""){ alert("密码不能为空！"); return; } if(a.number.value==""){ alert("验证码不能为空！"); return; } a.submit(); } </script> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>2.jsp</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String name=request.getParameter("name"); String password=request.getParameter("password"); String number=request.getParameter("number"); String yzm=request.getParameter("yzm"); if(name.equals(password)&&number.equals(yzm)){ request.getRequestDispatcher("3.jsp").forward(request, response); }else{ request.getRequestDispatcher("4.jsp").forward(request, response); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title>3.jsp</title> </head> <body> <h3>登录成功</h3> <% request.setCharacterEncoding("utf-8"); String huiyuan = request.getParameter("huiyuan"); if(huiyuan.equals("yes")){ out.print("欢迎您注册为会员"); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>4.jsp</title>
</head>
<body>
<h3>登陆失败！</h3>
</body>
</html>
5.在页面1的表单内输人一个数字N，提交，能够在另一个页面打印N个“欢迎”字符串。
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title></title> </head> <body> <form name="form" action="counter.jsp" method="post"> 输入数字N：<input type="text" name="number"><br> <input type="submit" value="提交" > </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title></title> </head> <body> <% String number=request.getParameter("number"); double n=Double.parseDouble(number); for(int i=0;i<n;i++){ out.println("欢迎"+"<br>"); } %> </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人用户姓名,输人之后提交,在页面3中显示用户的账号和姓名。
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title></title> </head> <body> <form action="2.jsp" method="post" name="form"> <table> <tr> <td>账号</td> <td><input type="text" name="zh" /> </td> </tr> <tr> <td>密码</td> <td><input type="password" name="password" /> </td> </tr> <tr> <td><input type="button" value="登录" onclick="login()" /> </td> </tr> </table> </form> <script> function login() { if (form.zh.value == "") { alert("用户名不能为空!"); form.zh.focus(); return; } if (form.password.value == "") { alert('密码不能为空!'); form.password.focus(); return; } if(form.zh.value==form.password.value){ form.submit(); }else{ alert('登陆失败'); form.password.focus(); return; } } </script> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title></title> </head> <body> <% String zh=request.getParameter("zh"); %> <form action="3.jsp" method="post"> <input type="text" name="name" /> <input type="submit" value="提交" /> <input type="hidden" name="zh" value="<%=zh %>"/> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title></title> </head> <body> <% request.setCharacterEncoding("utf-8"); String zh=request.getParameter("zh"); String name=request.getParameter("name"); out.print("用户姓名："+name+"<br>"+"用户账号："+zh); %> </body> </html>
