第七周
1
p78例4-9
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body bgcolor=#9370DB >
<%double price=98.78; %>
<p style="font-family:宋体;font-size:36;color:Thistle">
商品编号A1001，价格8765
<a href="two.jsp?id=A1001&price=8765">购买</a><br>
商品编号A1002，价格<%=price %>
<a href="two.jsp?id=A1002&price=<%=price %>">购买</a>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'two.jsp' starting page</title>
</head>
<body bgcolor=#FFB6C1>
<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 %></b><br>
商品价格：<%=price %>
</p>
</body>
</html>
2
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<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>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body bgcolor=#ffcff>
<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>
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"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>denglu.jsp</title>
</head>
<body>
<%
char shu[]={'0','1','2','3','4','5','6','7','8','9'};
String ma="";
for(int i=0;i<4;i++){
ma=ma+shu[(int)(Math.random()*10)];
}
%>
<form action="panduan.jsp" method="post" name="MyJsp">
请输入账号： <input name="name" type="text"/><br/>
请输入密码： <input name="password" type="password"/><br/>
请输入验证码：<input name="number" type="text"/>
<input type="button" name="yanzhengma" value="<%=ma%>"/>
<input type="hidden" name="yanzhengma" value="<%=ma%>"/><br/>
<input type="button" value="登录" onclick="denglu()"/>
<script type="text/javascript">
function denglu(){
if(MyJsp.name.value==""){
alert("账号不能为空！");
return;
}
if(MyJsp.password.value==""){
alert("密码不能为空！");
return;
}
if(MyJsp.number.value==""){
alert("验证码不能为空！");
return;
}
MyJsp.submit();
}
</script>
</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>panduan.jsp</title>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String name=request.getParameter("name");
String password=request.getParameter("password");
String number=request.getParameter("number");
String yanzhengma=request.getParameter("yanzhengma");
if(name.equals(password)&&number.equals(yanzhengma)){
request.getRequestDispatcher("ok.jsp").forward(request, response);
}else{
request.getRequestDispatcher("no.jsp").forward(request, response);
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>ok.jsp</title>
</head>
<body>
<h3>登陆成功！</h3>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>no.jsp</title>
</head>
<body>
<h3>登陆失败！</h3>
</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"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>denglu.jsp</title>
</head>
<body>
<%
char shu[]={'0','1','2','3','4','5','6','7','8','9'};
String ma="";
for(int i=0;i<4;i++){
ma=ma+shu[(int)(Math.random()*10)];
}
%>
<form action="panduan.jsp" method="post" name="MyJsp">
请输入账号： <input name="name" type="text"/><br/>
请输入密码： <input name="password" type="password"/><br/>
请输入验证码：<input name="number" type="text"/>
<input type="button" name="yanzhengma" value="<%=ma%>"/>
<input type="hidden" name="yanzhengma" value="<%=ma%>"/><br/>
是否加入会员：<input type="checkbox" name="vip" value="yes"/>是
<input type="checkbox" name="vip" value="no"/>否<br/>
<input type="button" value="登录" onclick="denglu()"/>
<script type="text/javascript">
function denglu(){
if(MyJsp.name.value==""){
alert("账号不能为空！");
return;
}
if(MyJsp.password.value==""){
alert("密码不能为空！");
return;
}
if(MyJsp.number.value==""){
alert("验证码不能为空！");
return;
}
MyJsp.submit();
}
</script>
</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>panduan.jsp</title>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String name=request.getParameter("name");
String password=request.getParameter("password");
String number=request.getParameter("number");
String yanzhengma=request.getParameter("yanzhengma");
if(name.equals(password)&&number.equals(yanzhengma)){
request.getRequestDispatcher("ok.jsp").forward(request, response);
}else{
request.getRequestDispatcher("no.jsp").forward(request, response);
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>ok.jsp</title>
</head>
<body>
<h3>登陆成功！</h3>
<%
String vip[]=request.getParameterValues("vip");
for(int k=0;k<vip.length;k++){
if(vip[k].equals("yes")){
out.print("恭喜您已成为会员！");
}
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>no.jsp</title>
</head>
<body>
<h3>登陆失败！</h3>
</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"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>N1.jsp</title>
</head>
<body>
<form action="N2.jsp" method="post">
请输入数字：<input type="text" name="number"/><br/>
<input type="submit" name="ok" 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>N2.jsp</title>
</head>
<body>
<%
String number=request.getParameter("number");
try{
double a=Double.parseDouble(number);
for(int i=0;i<=a;i++){
out.print("欢迎！"+"<br/>");
}
}catch(NumberFormatException e){
out.print("请输入数字字符");
}
%>
</body>
</html>
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