JSP第五次作业
1.教材P78-79 例4-9
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% double price=98.78; %> 商品编号 A1001,价格8765 <a href="bbb.jsp?id=A1002&price=<%=price %>">购买</a><br> 商品编号 A1002,价格 <%=price %> <a href="bbb.jsp?id=A1002&price=<%=price %>">购买</a><br> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% String id=request.getParameter("id"); String price=request.getParameter("price"); %> 商品编号:<%=id %><br> 商品价格:<%=price %><br> </body> </html>
2.教材P97 实验2
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <form action="computer.jsp"> 输入运算数,选择运算符号:<br> <input type="text" name="numberone"> <select name="operator"> <option selected="selected" value="+">+ <option value="-">- <option value="*">* <option value="/">/ </select> <input type="text" name="numbertwo"><br> <input type="submit" name="submit" value="提交"><br> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% String numberone = request.getParameter("numberone"); String numbertwo = request.getParameter("numbertwo"); String operator = request.getParameter("operator"); if (numberone == null || numberone.length() == 0) { response.sendRedirect("ccc.jsp"); return; } try { double a = Double.parseDouble(numberone); double b = Double.parseDouble(numbertwo); double r = 0; 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("请输入数字字符"); } %> </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"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <body> 登录 <br /> <form action="zhuanfa.jsp" name="myform" method="post"> 用户名:<input type="text" name="uname"><br /> 密码:<input type="password" name="upwd"><br /> <input type="submit" value="登录"> </form> </body> </html>
转发
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String name = request.getParameter("uname"); String pwd = request.getParameter("upwd"); if (name.equals("zs") && pwd.equals("123")) request.getRequestDispatcher("ok.jsp").forward(request, response); else request.getRequestDispatcher("no.jsp").forward(request, response); %>
成功
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <body> <h1 style="color: red">登录成功</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 language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body>
登录
<br />
<script type="text/javascript"> function validate() { if (loginForm.account.value == "") { alert("账号不能为空!"); return; } else if (loginForm.password.value == "") { alert("密码不能为空!"); return; } loginForm.submit(); } </script> <form action="huiyuan.jsp"> 用 户 名: <input type="text" name="uname"><br> 密 码: <input type="password" name="upwd"><br> <input type="checkbox" name="check"> 注册会员 <input type="checkbox" name="nocheck"> 跳过 <input type="submit" value="提交"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); String check = request.getParameter("check"); String nocheck = request.getParameter("check"); if (uname.equals(upwd)) { out.println("登陆成功"); if (check.equals("on")) out.print("欢迎您注册会员"); else if (nocheck.equals("on")) out.print("欢迎使用"); } else { out.println("登陆失败"); } %> </body> </html>
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"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <form action="huanying.jsp"> 请输入一个数字 <input type="text" name="num"><br> <input type="submit" value="提交"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("utf-8"); String num = request.getParameter("num"); double n = Double.parseDouble(num); for (int i = 0; i < n; 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 PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> 登录 <br/> <script> function validate() { if (loginForm.account.value == "") { alert("账号不能为空!"); return; } else if (loginForm.password.value == "") { alert("密码不能为空!"); return; } loginForm.submit(); } </script> <form action="chenggong.jsp"> 账号: <input type="text" name="uname"><br> 密码: <input type="password" name="upwd"><br> <input type="submit"value="提交"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); if (uname.equals(upwd)) { request.getRequestDispatcher("tiaozhuan.jsp").forward(request,response); } else { response.sendRedirect("no.jsp"); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); %><br> <form action="xianshi.jsp"> 用 户 名: <input type="text" name="name"><br> <input type="submit" value="提交"> <input name="uname" type="hidden"value="<%=uname%>"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String name = request.getParameter("name"); out.print("账号是" + uname + ",密码是" + name); out.print(name); %> </body> </html>