JSP第七周作业
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"%> <html> <head> </head> <body> <form action="computer.jsp" method="post"> 输入运算数，选择运算符号：<br> <input type="text" name="a1"size=6/> <select name="op"> <option value="+">加 <option value="-">减 <option value="*">乘 <option value="/">除 </select> <input type="text" name="a2"size=6/><br> <input type="submit" value="提交"/> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> </head> <body> <% String a1 = request.getParameter("a1"); String a2 = request.getParameter("a2"); String op = request.getParameter("op"); if (a1 == null || a1.length() == 0) { response.sendRedirect("input.jsp"); return; } else if (a2 == null || a2.length() == 0) { response.sendRedirect("input.jsp"); return; } try { double a = Double.parseDouble(a1); double b = Double.parseDouble(a2); double r = 0; if (op.equals("+")) { r = a + b; } else if (op.equals("-")) { r = a - b; } else if (op.equals("*")) { r = a * b; } else if (op.equals("/")) { r = a / b; } out.print(a + "" + op + "" + b + "=" + r); } catch (Exception e) { out.print("错了"); } %> </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> </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="aa.jsp" name="loginForm" method="post"> 输入账号：<input name="account" type="text" /><br> 输入密码:<input name="password" type="password" /><br> <input type="button" value="登录"onClick="validate()"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <html> </head> <body> <% String account=request.getParameter("account"); String password=request.getParameter("password"); if(account.equals(password)){ 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"%> <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="aa.jsp" name="loginForm" method="post"> 输入账号：<input name="account" type="text" /><br> 输入密码:<input name="password" type="password" /><br> 是否注册会员： <input type="checkbox" name="yes" value="1"/>注册 <input type="checkbox" name="yes" value="2"/>不注册<br> <input type="button" value="登录"onClick="validate()"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> </head> <body> <h1>登录成功</h1> <% String []yes=request.getParameterValues("yes"); for(int i=0;i<yes.length;i++){ if(yes[i].equals("1")){ out.print("注册为会员"); } } %> </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> </head> <body> <form action="two.jsp" name="logindo"> 请输入数字： <input type="text" name="number" size=6><br> <input type="submit" value="提交" /> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </head> <body> <% String number = request.getParameter("number"); int n = Integer.parseInt(number); 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。（转发）request.getRequestDispacher.....forward
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </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="t02.jsp" name="logindo"> 账号: <input type="text" name="admin" size=6><br> 密码: <input type="password" name="password" size=6><br> <input type="button" value="登录" onclick="login()" /> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </head> <body> <% 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"); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </head> <body> 登录成功！！！ <% String admin = request.getParameter("admin"); %> <form action="t03.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>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </head> <body> 登录失败<br> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </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>
