JSP第七次作业
1.教材P78-79 例4-9
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>首页</title> 6 </head> 7 8 <body bgcolor="#ffccff"> 9 <% 10 double price = 98.78; 11 %> 12 <p style="font-family: 宋体; font-size: 36; color: blue"> 13 商品编号A1001，价格8765 <a href="receive.jsp?id=A1001&price=8765">购买</a><br> 14 商品编号A1002，价格<%=price%> 15 <a href="receive.jsp?id=A1002&price=<%=price%>">购买</a> 16 </p> 17 </body> 18 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>第二页</title> 6 </head> 7 8 <body bgcolor="#eeeeff"> 9 <p style="font-family: 宋体; font-size: 36; color: blue"> 10 <% 11 String id = request.getParameter("id"); 12 String price = request.getParameter("price"); 13 %> 14 商品编号：<%=id %><br> 15 商品价格：<%=price %> 16 </p> 17 </body> 18 </html>
2.教材P97 实验2
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>首页</title> 6 </head> 7 8 <body> 9 输入运算数，选择运算符号：<br> 10 <form action="jisuan.jsp"> 11 <input type="text" name="num1" > 12 <select name="fuhao"> 13 <option value="+">加 14 <option value="-">减 15 <option value="*">乘 16 <option value="/">除 17 </select> 18 <input type="text" name="num2" > 19 <br><input type="submit" value="提交"> 20 </form> 21 </body> 22 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>首页</title> 6 </head> 7 8 <body> 9 <% 10 String num1 = request.getParameter("num1"); 11 String num2 = request.getParameter("num2"); 12 String fuhao = request.getParameter("fuhao"); 13 if (num1 == null || num2 == null || num1.length() == 0 14 || num2.length() == 0) { 15 response.sendRedirect("index.jsp"); 16 return; 17 } 18 try { 19 double a = Double.parseDouble(num1); 20 double b = Double.parseDouble(num2); 21 double r = 0; 22 if ("+".equals(fuhao)) { 23 r = a + b; 24 } else if ("-".equals(fuhao)) { 25 r = a - b; 26 } else if ("*".equals(fuhao)) { 27 r = a * b; 28 } else if ("/".equals(fuhao)) { 29 r = a / b; 30 } 31 out.print(a + "" + fuhao + "" + b + "=" + r); 32 } catch (Exception e) { 33 out.print("请输入正确的数字"); 34 } 35 %> 36 </body> 37 </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）
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>登录</title> 6 </head> 7 8 <body> 9 <script> 10 function validate() { 11 if (form.uname.value == "") { 12 alert("账号不能为空!"); 13 return; 14 } 15 if (form.password.value == "") { 16 alert("密码不能为空!"); 17 return; 18 } 19 form.submit(); 20 } 21 </script> 22 <form name="form" action="dologin.jsp" method="post"> 23 用户名:<input type="text" name="uname"><br> 密码: <input 24 type="password" name="password"> <br> 验证码： <input 25 type="text" name="checkcode" size="4" /> 26 <!-- 验证码--> 27 <img src="img.jsp" /><br> 28 <input type="button" value="登录" onClick="validate()"> 29 </form> 30 </body> 31 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 request.setCharacterEncoding("utf-8"); 4 %> 5 <!DOCTYPE HTML> 6 <html> 7 <head> 8 <title></title> 9 </head> 10 <body> 11 <% 12 String uname = request.getParameter("uname"); 13 String password = request.getParameter("password"); 14 String checkcode = request.getParameter("checkcode"); 15 session = request.getSession(); 16 String realcode = (String)session.getAttribute("checkcode"); 17 if (uname.equals(password)&&checkcode.equals(realcode)) { 18 request.getRequestDispatcher("true.jsp").forward(request, 19 response); 20 } else { 21 request.getRequestDispatcher("false.jsp").forward(request, 22 response); 23 } 24 %> 25 </body> 26 </html>
1 <%@page import="javax.imageio.ImageIO"%> 2 <%@page import="java.awt.image.BufferedImage"%> 3 <%@ page import="java.awt.*"%> 4 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 5 6 <%!public Color getColor() { 7 Random ran = new Random(); 8 int R = ran.nextInt(255); 9 int G = ran.nextInt(255); 10 int B = ran.nextInt(255); 11 return new Color(R, G, B); 12 } 13 14 public String codeGenerate() { 15 int code = (int) (Math.random() * 9000 + 1000); 16 return String.valueOf(code); 17 }%> 18 <% 19 response.setHeader("Pragma", "no-cache"); 20 response.setHeader("Cache-Control", "no-cache"); 21 response.setHeader("Expires", "0"); 22 BufferedImage image = new BufferedImage(80, 30, 23 BufferedImage.TYPE_INT_RGB); 24 Graphics pen = image.getGraphics(); 25 pen.fillRect(0, 0, 80, 30); 26 pen.setFont(new Font("seif", Font.BOLD, 20)); 27 pen.setColor(Color.BLACK); 28 String checkCode = codeGenerate(); 29 StringBuffer sb = new StringBuffer(); 30 for (int i = 0; i < checkCode.length(); i++) { 31 sb.append(checkCode.charAt(i) + " "); 32 } 33 pen.drawString(sb.toString(), 15, 20); 34 for (int i = 0; i < 20; i++) { 35 Random ran = new Random(); 36 int xBegin = ran.nextInt(80); 37 int yBegin = ran.nextInt(30); 38 int xEnd = ran.nextInt(xBegin + 15); 39 int yEnd = ran.nextInt(yBegin + 15); 40 pen.setColor(getColor()); 41 pen.drawLine(xBegin, yBegin, xEnd, yEnd); 42 } 43 session.setAttribute("checkcode", checkCode); 44 ImageIO.write(image, "jpeg", response.getOutputStream()); 45 out.clear(); 46 out = pageContext.pushBody(); 47 %>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title></title> 6 </head> 7 <body> 8 <h2>登录成功</h2> 9 </body> 10 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title></title> 6 </head> 7 <body> 8 <h2>登录失败</h2> 9 </body> 10 </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”。
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>注册会员</title> 6 </head> 7 <body> 8 <script> 9 function validate() { 10 if (form.uname.value == "") { 11 alert("账号不能为空!"); 12 return; 13 } 14 if (form.password.value == "") { 15 alert("密码不能为空!"); 16 return; 17 } 18 form.submit(); 19 } 20 </script> 21 22 <form name="form" action="../code03/dologin.jsp" method="post"> 23 用户名:<input type="text" name="uname"><br> 密码: <input 24 type="password" name="password"> <br> 是否注册为会员：<input 25 type="checkbox" name="member" value="注册">注册 <input 26 type="checkbox" name="member" value="不注册">不注册<br> 27 验证码： <input type="text" name="checkcode" size="4" /> 28 <!-- 验证码--> 29 <img src="../code03/img.jsp" /><br> 30 <input type="button" value="登录" onClick="validate()"> 31 32 </form> 33 </body> 34 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 request.setCharacterEncoding("utf-8"); 4 %> 5 <!DOCTYPE HTML> 6 <html> 7 <head> 8 <title></title> 9 </head> 10 <body> 11 <% 12 String uname = request.getParameter("uname"); 13 String password = request.getParameter("password"); 14 String checkcode = request.getParameter("checkcode"); 15 session = request.getSession(); 16 String realcode = (String)session.getAttribute("checkcode"); 17 if (uname.equals(password)&&checkcode.equals(realcode)) { 18 request.getRequestDispatcher("true.jsp").forward(request, 19 response); 20 } else { 21 request.getRequestDispatcher("false.jsp").forward(request, 22 response); 23 } 24 %> 25 </body> 26 </html>
1 <%@page import="javax.imageio.ImageIO"%> 2 <%@page import="java.awt.image.BufferedImage"%> 3 <%@ page import="java.awt.*"%> 4 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 5 6 <%!public Color getColor() { 7 Random ran = new Random(); 8 int R = ran.nextInt(255); 9 int G = ran.nextInt(255); 10 int B = ran.nextInt(255); 11 return new Color(R, G, B); 12 } 13 14 public String codeGenerate() { 15 int code = (int) (Math.random() * 9000 + 1000); 16 return String.valueOf(code); 17 }%> 18 <% 19 response.setHeader("Pragma", "no-cache"); 20 response.setHeader("Cache-Control", "no-cache"); 21 response.setHeader("Expires", "0"); 22 BufferedImage image = new BufferedImage(80, 30, 23 BufferedImage.TYPE_INT_RGB); 24 Graphics pen = image.getGraphics(); 25 pen.fillRect(0, 0, 80, 30); 26 pen.setFont(new Font("seif", Font.BOLD, 20)); 27 pen.setColor(Color.BLACK); 28 String checkCode = codeGenerate(); 29 StringBuffer sb = new StringBuffer(); 30 for (int i = 0; i < checkCode.length(); i++) { 31 sb.append(checkCode.charAt(i) + " "); 32 } 33 pen.drawString(sb.toString(), 15, 20); 34 for (int i = 0; i < 20; i++) { 35 Random ran = new Random(); 36 int xBegin = ran.nextInt(80); 37 int yBegin = ran.nextInt(30); 38 int xEnd = ran.nextInt(xBegin + 15); 39 int yEnd = ran.nextInt(yBegin + 15); 40 pen.setColor(getColor()); 41 pen.drawLine(xBegin, yBegin, xEnd, yEnd); 42 } 43 session.setAttribute("checkcode", checkCode); 44 ImageIO.write(image, "jpeg", response.getOutputStream()); 45 out.clear(); 46 out = pageContext.pushBody(); 47 %>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 request.setCharacterEncoding("utf-8"); 4 %> 5 <!DOCTYPE HTML> 6 <html> 7 <head> 8 <title></title> 9 </head> 10 <body> 11 <h2>登录成功</h2> 12 <% 13 String[] member = request.getParameterValues("member"); 14 for (int i = 0; i < member.length; i++) { 15 if (member[i].equals("注册")) { 16 out.print("欢迎您注册为会员！"); 17 } 18 } 19 %> 20 </body> 21 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title></title> 6 </head> 7 <body> 8 <h2>登录失败</h2> 9 </body> 10 </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。
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>登录</title> 6 </head> 7 <body> 8 <form action="print.jsp" method="post"> 9 请输入数字：<input type="text" name="number" size=10><br> 10 <input type="submit" name="submit" value="提交"> 11 </form> 12 </body> 13 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 request.setCharacterEncoding("utf-8"); 4 %> 5 <!DOCTYPE HTML> 6 <html> 7 <head> 8 <title>登录</title> 9 </head> 10 <body> 11 <% 12 String number = request.getParameter("number"); 13 int a = Integer.parseInt(number); 14 for (int i = 0; i < a; i++) { 15 out.print("欢迎" + "<br>"); 16 } 17 %> 18 </body> 19 </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。
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>登录</title> 6 </head> 7 <body> 8 <script> 9 function validate() { 10 if (form.account.value == "") { 11 alert("账号不能为空!"); 12 return; 13 } 14 if (form.password.value == "") { 15 alert("密码不能为空!"); 16 return; 17 } 18 form.submit(); 19 } 20 </script> 21 22 <form name="form" action="dologin.jsp" method="post"> 23 账号:<input type="text" name="account"><br> 密码: <input 24 type="password" name="password"> <br> <input type="button" 25 value="登录" onClick="validate()"> 26 27 </form> 28 </body> 29 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 request.setCharacterEncoding("utf-8"); 4 %> 5 <!DOCTYPE HTML> 6 <html> 7 <head> 8 <title>登录</title> 9 </head> 10 <body> 11 <% 12 String account = request.getParameter("account"); 13 String password = request.getParameter("password"); 14 if (account.equals(password)) { 15 request.getRequestDispatcher("true.jsp").forward(request, 16 response); 17 } else { 18 request.getRequestDispatcher("false.jsp").forward(request, 19 response); 20 } 21 %> 22 </body> 23 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 request.setCharacterEncoding("UTF-8"); 4 %> 5 <!DOCTYPE HTML> 6 <html> 7 <head> 8 <title></title> 9 </head> 10 <body> 11 <h2>登录成功</h2> 12 <% 13 String account = request.getParameter("account"); 14 %> 15 <form action="show.jsp" method="post"> 16 用户名：<input type="text" name="username"><br> <br> <input 17 type="submit" name="submit" value="提交"> <input type="hidden" 18 name="account" value="<%=account%>"> 19 </form> 20 </body> 21 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title></title> 6 </head> 7 <body> 8 <h2>登录失败</h2> 9 </body> 10 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 request.setCharacterEncoding("utf-8"); 4 %> 5 <!DOCTYPE HTML> 6 <html> 7 <head> 8 <title></title> 9 </head> 10 <body> 11 <% 12 String account = request.getParameter("account"); 13 String uname = request.getParameter("username"); 14 out.print("账号：" + account + "<br>" + "<br>" + "用户名：" + uname); 15 %> 16 </body> 17 </html>
