第七周作业
1.
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title>首页</title> </head> <body bgcolor="#ffccff"> <% double price = 98.78; %> <p style="font-family: 宋体; font-size: 36; color: blue"> 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> </p> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title>第二页</title> </head> <body bgcolor="#eeeeff"> <p style="font-family: 宋体; font-size: 36; color: blue"> <% String id = request.getParameter("id"); String price = request.getParameter("price"); %> 商品编号：<%=id %><br> 商品价格：<%=price %> </p> </body> </html>
2.
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </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> </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.
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title>登录</title> </head> <body> <script> function validate() { if (form.uname.value == "") { alert("账号不能为空!"); return; } if (form.password.value == "") { alert("密码不能为空!"); return; } form.submit(); } </script> <form name="form" action="dologin.jsp" method="post"> 用户名:<input type="text" name="uname"><br> 密码: <input type="password" name="password"> <br> 验证码： <input type="text" name="checkcode" size="4" /> <!-- 验证码--> <img src="img.jsp" /><br> <input type="button" value="登录" onClick="validate()"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); %> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <% String uname = request.getParameter("uname"); String password = request.getParameter("password"); String checkcode = request.getParameter("checkcode"); session = request.getSession(); String realcode = (String)session.getAttribute("checkcode"); if (uname.equals(password)&&checkcode.equals(realcode)) { request.getRequestDispatcher("true.jsp").forward(request, response); } else { request.getRequestDispatcher("false.jsp").forward(request, response); } %> </body> </html>
<%@page import="javax.imageio.ImageIO"%> <%@page import="java.awt.image.BufferedImage"%> <%@ page import="java.awt.*"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%!public Color getColor() { Random ran = new Random(); int R = ran.nextInt(255); int G = ran.nextInt(255); int B = ran.nextInt(255); return new Color(R, G, B); } public String codeGenerate() { int code = (int) (Math.random() * 9000 + 1000); return String.valueOf(code); }%> <% response.setHeader("Pragma", "no-cache"); response.setHeader("Cache-Control", "no-cache"); response.setHeader("Expires", "0"); BufferedImage image = new BufferedImage(80, 30, BufferedImage.TYPE_INT_RGB); Graphics pen = image.getGraphics(); pen.fillRect(0, 0, 80, 30); pen.setFont(new Font("seif", Font.BOLD, 20)); pen.setColor(Color.BLACK); String checkCode = codeGenerate(); StringBuffer sb = new StringBuffer(); for (int i = 0; i < checkCode.length(); i++) { sb.append(checkCode.charAt(i) + " "); } pen.drawString(sb.toString(), 15, 20); for (int i = 0; i < 20; i++) { Random ran = new Random(); int xBegin = ran.nextInt(80); int yBegin = ran.nextInt(30); int xEnd = ran.nextInt(xBegin + 15); int yEnd = ran.nextInt(yBegin + 15); pen.setColor(getColor()); pen.drawLine(xBegin, yBegin, xEnd, yEnd); } session.setAttribute("checkcode", checkCode); ImageIO.write(image, "jpeg", response.getOutputStream()); out.clear(); out = pageContext.pushBody(); %>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title></title>
</head>
<body>
<h2>登录成功</h2>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title></title>
</head>
<body>
<h2>登录失败</h2>
</body>
</html>
4.
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body>
<form action="two.jsp" method="post">
<input type="text" name="text"/>
<input type="submit" value="提交"/>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </head> <body> <% String text = request.getParameter("text"); int n = Integer.parseInt(text); for (int i = 0; i < n; i++) { out.print("欢迎" + "<br>"); } %> </body> </html>
