第七周作业
1.教材P78-79 例4-9
<%@ 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>
二、教材P97 实验2(计算器)
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> = </head> <body bgcolor=#ffccff> <form action="computer.jsp" method=post name=form> <p style="font-family:宋体;font-size:18;color:black"> 输入运算数,选择运算符号:<br> <input type=text name="numberOne" size=6/> <select name="operator"> <option selected="selected" value="+">加 <option value="-">减 <option value="*">乘 <option value="/">除 </select> <input type=text name="numberTwo" size=6/> <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> <title>jsq2.jsp</title> </head> <body bgcolor=cyan> <p style="font-family:宋体;font-size:18;color:black"> <% String numberOne=request.getParameter("numberOne"); String numberTwo=request.getParameter("numberTwo"); String operator=request.getParameter("operator"); if(numberOne==null||numberOne.length()==0){ response.sendRedirect("input.jsp"); return; } else if(numberTwo==null||numberTwo.length()==0){ response.sendRedirect("input.jsp"); return; } try{ double a=Double.parseDouble(numberOne); double b=Double.parseDouble(numberTwo); double r=0; if(operator.equals("+")) r=a+b; if(operator.equals("-")) r=a-b; if(operator.equals("*")) r=a*b; if(operator.equals("/")) r=a/b; out.print(a+""+operator+""+b+"="+r); } catch(Exception e){ out.println("请输入数字字符"); } %> </body>
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> <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="zhanghao.jsp" name="loginForm" method="post"> 账号:<input type="text" name="account" placeholder="请输入账号"/><br> 密码:<input type="password" name="password" placeholder="请输入密码"/><br> <input type="button" value="登录"onClick="validate()"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <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>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); %> <html> <body> 登陆成功! </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> <form action="index1.jsp" method="post" name="login"> 账号:<input type="text" name="account" /><br> 密码:<input type="password" name="psd" /><br> 是否注册为会员:<input type="checkbox" name="checkbox" /> <br> <input type="submit" value="登录" style="margin-left: 100px" onclick="check()" /> <script type="text/javascript"> function check(){ if(login.account.value==""||login.account.value==null&&login.psd.value==""||login.psd.value==null){ alert("账号或密码不能为空!!!"); return ; } login.submit(); } </script> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </head> <body> <% request.setCharacterEncoding("utf-8"); String account=request.getParameter("account"); String psd=request.getParameter("psd"); String checkbox=request.getParameter("checkbox"); if(account.equals("123456")&&psd.equals("123456")){ if(checkbox!=null) out.print("欢迎注册为会员"+"<br>"); out.print("登录成功!!!"); } else{ out.print("登录失败!!!"); } %> </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。
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<form action="welcome.jsp" method="post">
<p style="font-family:宋体;font-size:18;color:black">
请输入数字:<input type="text" name="number" size=10><br>
<br>
<br> <input type="submit" name="submit" value="提交">
</form>
</body>
</html>
<html> <head> <base href="<%=basePath%>"> <title>My JSP 'welcome.jsp' starting page</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String number = request.getParameter("number"); int a = Integer.parseInt(number); for (int i = 0; i < a; 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。
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title></title> </head> <body> <form action="2.jsp" method="post" name="form"> <table> <tr> <td>账号</td> <td><input type="text" name="zh" /> </td> </tr> <tr> <td>密码</td> <td><input type="password" name="password" /> </td> </tr> <tr> <td><input type="button" value="登录" onclick="login()" /> </td> </tr> </table> </form> <script> function login() { if (form.zh.value == "") { alert("用户名不能为空!"); form.zh.focus(); return; } if (form.password.value == "") { alert('密码不能为空!'); form.password.focus(); return; } if(form.zh.value==form.password.value){ form.submit(); }else{ alert('登陆失败'); form.password.focus(); return; } } </script> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title></title> </head> <body> <% String zh=request.getParameter("zh"); %> <form action="3.jsp" method="post"> <input type="text" name="name" /> <input type="submit" value="提交" /> <input type="hidden" name="zh" value="<%=zh %>"/> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML > <html> <head> <title></title> </head> <body> <% request.setCharacterEncoding("utf-8"); String zh=request.getParameter("zh"); String name=request.getParameter("name"); out.print("用户姓名:"+name+"<br>"+"用户账号:"+zh); %> </body> </html>