<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>???????</title> </head> <body> <% 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 ="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=A1001&price=<%=price %>">购买</a> </p> </body> </html>
example4_9.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>???????</title>
</head>
<body>
<%
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 ="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=A1001&price=<%=price %>">购买</a>
</p>
</body>
</html>
2.教材P97 实验2
input.jsp:
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>???????</title>
</head>
<body>
<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>>
</body>
</html>
computer.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>???????</title>
</head>
<body>
<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）
login.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
<title>登录页面</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="dologin.jsp" method="post">
用户名:<input type="text" name="uname" ><br>
<br>密码: <input type="password" name="upwd" >
<br><input type="button" value="登录" onClick="validate()">
<input type="reset" value="重置">
</form>
</body>
</html>
dologin.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
request.setCharacterEncoding("utf-8");
String uname = request.getParameter("uname");
String upwd = request.getParameter("upwd");
if (uname.equals("admin") && upwd.equals("admin"))
//跳转Ok页面
request.getRequestDispatcher("ok.jsp").forward(request, response);
else
//跳转no页面
request.getRequestDispatcher("no.jsp").forward(request, response);
%>
ok.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>登录成功页面</title>
</head>
<body>
<h1>登陆成功！！</h1>
</body>
</html>
no.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>登录失败页面</title>
</head>
<body>
<h1>登陆失败！！</h1>
</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”。
login.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
<title>登录页面</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="dologin.jsp" method="post">
用户名:<input type="text" name="uname" ><br>
<br>密码: <input type="password" name="upwd" ><br>
<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>
<br><input type="button" value="登录" onClick="validate()">
<input type="reset" value="重置">
</form>
</body>
</html>
ok.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>登录成功页面</title>
</head>
<body>
<h1>登陆成功！！</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。
New.File.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>???????</title>
</head>
<body>
<form action="NewFile1.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>
New.File1.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>???????</title>
</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
login.jsp：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
<title>登录页面</title>
</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="dologin.jsp" name="logindo">
账号:
<input type="text" name="admin" size=6><br>
密码:
<input type="password" name="password" size=6><br>
<br><input type="button" value="登录" onclick="login()" />
</form>
</body>
</html>
dologin.jsp：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
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");
}
%>
%>
ok.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>登录成功页面</title>
</head>
<body>
<h1>登陆成功！！</h1>
<%
String admin = request.getParameter("admin");
%>
<form action="NewFile2.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>
New.File2:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>???????</title>
</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>
no.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>登录失败页面</title>
</head>
<body>
<h1>登陆失败！！</h1>
</body>
</html>
