JSP第7周作业
1.教材P78-79 例4-9
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </head> <body> <% double price=98.78; %> 商品编号A1001，价格8765 <a href="example4_9_receive.jsp?id=A1001&price=8765">购买</a><br> 商品编号A1002，价格<%=price %> <a href="example4_9_receive.jsp?id=A1002&price=<%=price %>">购买</a><br> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> </head> <body> <% String id=request.getParameter("id"); String price=request.getParameter("price"); %> <b>商品编号：<%= id %></b> 商品价格：<%= price %> </body> </html>
2.教材P97 实验2
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body bgcolor="#ffccff"> <form action="index1.jsp" method="post" name="form"> <p style="font-family: 宋体;font-size: 18; color: blue"> 输入运算数，选择运算符:<br> <input type="text" name="num1" size=6 /> <select name="oper"> <option selected="selected" value="+">加 <option value="-">减 <option value="*">乘 <option value="/">除 </select> <input type="text" name="num2" size=6 /> <input type="submit" value="提交"> </p> </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 bgcolor="cyan"> <p style="font-family: 宋体; font-size: 18;color: black;"> <% String num1 = request.getParameter("num1"); String num2 = request.getParameter("num2"); String oper = request.getParameter("oper"); if (num1 == null || num1.length() == 0) { response.sendRedirect("index.jsp"); return; } else if (num2 == null || num2.length() == 0) { response.sendRedirect("index.jsp"); return; } try { double a = Double.parseDouble(num1); double b = Double.parseDouble(num2); double x = 0; if (oper.equals("+")) { x = a + b; } else if (oper.equals("-")) { x = a - b; } else if (oper.equals("*")) { x = a * b; } else if (oper.equals("/")) { x = a / b; } out.print(a+""+oper+""+b+"="+x); } catch (Exception e) { out.print("请输入数字字符"); } %> </p> </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> <head> </head> <body> <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="fff.jsp" > 用 户 名: <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("ok.jsp").forward(request,response); } else{ response.sendRedirect("no.jsp"); } %> </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"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP '5.jsp' starting page</title> </head> <script type="text/javascript"> function validate() { if (loginForm.uname.value == "") { alert("账号不能为空!"); return; } if (loginForm.upwd.value == "") { alert("密码不能为空!"); return; } loginForm.submit(); } </script> <form name="loginForm" action="6.jsp" method="post"> 用户名:<input type="text" name="uname"><br> 密码: <input type="password" name="upwd"> <br> 是否注册为会员：<input type="checkbox" name="member" value="注册">注册 <input type="checkbox" name="member" value="不注册">不注册<br> <input type="button" value="登录" onClick="validate()"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP '6.jsp' starting page</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); if (uname.equals(upwd)) request.getRequestDispatcher("7.jsp").forward(request, response); else request.getRequestDispatcher("8.jsp").forward(request, response); %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP '7.jsp' starting page</title> </head> <p>登录成功！</p> <% request.setCharacterEncoding("utf-8"); String[] member = request.getParameterValues("member"); for (int i = 0; i < member.length; i++) { if (member[i].equals("注册")) { out.print("欢迎您注册为会员！"); } } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP '8.jsp' starting page</title> </head> <p>登录失败！</p> </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"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <form action="index2.jsp" method="post" name="form"> 输入任意整数N：<input type="text" name="name" > <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> <title>My JSP 'index2.jsp' starting page</title> </head> <body> <% request.setCharacterEncoding("UTF-8"); String name=request.getParameter("name"); int n=Integer.parseInt(name); for(int i=0;i<n;i++){ out.print("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。
login.jsp： <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title>登录页面</title> </head> <body> <script type="text/javascript"> function login() { if (logindo.admin.value == "") { alter("账号不能为空"); return; } else if (logindo.password.value == "") { alter("密码不能为空"); return; } logindo.submit(); } </script> <form action="dologin.jsp" name="logindo"> 账号: <input type="text" name="admin" size=6><br> 密码: <input type="password" name="password" size=6><br> <br><input type="button" value="登录" onclick="login()" /> </form> </body> </html> dologin.jsp： <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String admin = request.getParameter("admin"); String password = request.getParameter("password"); if (admin.equals(password)) { request.getRequestDispatcher("ok.jsp").forward(request, response); } else { response.sendRedirect("no.jsp"); } %> %> ok.jsp: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>登录成功页面</title> </head> <body> <h1>登陆成功！！</h1> <% String admin = request.getParameter("admin"); %> <form action="NewFile2.jsp"> 用户名：<input type="text" name="uname"> <input type="submit"value="提交"> <input name="admin" type="hidden" value="<%= admin %>"> </form> </body> </html> New.File2: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>???????</title> </head> <body> <% String admin = request.getParameter("admin"); String uname = request.getParameter("uname"); out.print("账号："+admin+"</br>"+"用户名称："+uname); %> </body> </html> no.jsp: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>登录失败页面</title> </head> <body> <h1>登陆失败！！</h1> </body> </html>
