第五次作业
1.教材P78-79 例4-9
<%@ 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 'index.jsp' starting page</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="example_receive.jsp?id=A1001&price=8765">购买</a><br>
商品编号A1002,价格<%=price%>
<a href="example_receive.jsp?id=A1002&price=<%=price%>">购买</a>
</p>
</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 'index.jsp' starting page</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");
%>
<b>商品编号:<%=id%><br> 商品价格:<%=price%>
</p>
</body>
</html>
2.教材P97 实验2
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <html><body bgcolor=#ffccff> <form action="computer.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" name="submit" value="提交"/> </form> </p> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<html>
<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;
else if (operator.equals("-"))
r = a - b;
else if (operator.equals("*"))
r = a * b;
else 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>
</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"%>
<%
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 'index.jsp' starting page</title>
</head>
<body>
<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="2.jsp" method="post">
用户名:<input type="text" name="uname"><br> 密码: <input
type="password" name="upwd"> <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 'index.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("3.jsp").forward(request,
response);
else
request.getRequestDispatcher("4.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 '3.jsp' starting page</title>
</head>
<body bgcolor=#ffccff>
<p>登录成功！</p>
</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 '4.jsp' starting page</title>
</head>
<body bgcolor=#EEEEFF>
<p>登录失败！</p>
</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”。
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。
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
