1.教材P78-79 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>index.jsp</title>
</head>
<body>
<%double price=4.5; %>
<p style="font-family:宋体;font-size: 25">
商品编号A1001，单价：15<a href="buy.jsp?num=A1001&price=15">购买</a><br/>
商品编号A1002，单价：<%=price %>
<a href="buy.jsp?num=A1002&price=<%= price%>">购买</a>
</p>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<body>
<p style="font-family:宋体;font-size: 25">
<%
String num=request.getParameter("num");
String price=request.getParameter("price");
%>
商品编号：<%=num %><br/>
商品单价：<%=price %><br/>
</p>
</body>
</html>
2.教材P97 实验2
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML >
<html>
<head>
</head>
<form action="index1.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:<br> <input type="text" name="num1" size=6 />
<select name="select">
<option selected="selected" value="+">加
<option value="-">减
<option value="*">乘
<option value="/">除
</select>
<input type="text" name="num2" size=6 />
<input type="submit" value="提交">
</p>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML >
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<p style="font-family: 宋体; font-size: 16;color: black;">
<%
String num1 = request.getParameter("num1");
String num2 = request.getParameter("num2");
String select = request.getParameter("select");
if (num1 == null || num1.length() == 0) {
response.sendRedirect("index.jsp");
return;
} else if (num2 == null || num2.length() == 0) {
response.sendRedirect("index.jsp");
return;
}
try {
double n1 = Double.parseDouble(num1);
double n2 = Double.parseDouble(num2);
double x = 0;
if (select.equals("+")) {
x = n1 + n2;
} else if (select.equals("-")) {
x = n1 - n2;
} else if (select.equals("*")) {
x = n1 * n2;
} else if (select.equals("/")) {
x = n1 / n2;
}
out.print(n1+""+select+""+n2+"="+x);
} catch (Exception e) {
out.print("请输入数字字符:");
}
%>
</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"%>
<html>
<head>
</head>
<body>
<%char a[] ={'0','1','2','3','4','5','6','7','8','9'};
String yzm="";
for(int i=0;i<4;i++){
yzm=yzm+a[(int)(Math.random()*10)];
}
%>
<form action="index1.jsp" method="post" name="login">
账号:<input type="text" name="account" /><br><br>
密码:<input type="password" name="psd" /><br><br>
验证码：<input type="text" name="yanzheng" /><%=yzm %><br><br>
<input type="hidden" name="yzm" value="<%=yzm %>"/>
<input type="button" 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"%>
<!DOCTYPE HTML >
<html>
<head>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String account=request.getParameter("account");
String psd=request.getParameter("psd");
String yanzheng=request.getParameter("yanzheng");
String yzm=request.getParameter("yzm");
if(account.equals("123456")&&psd.equals("123456")&&yanzheng.equals(yzm))
request.getRequestDispatcher("ok.jsp").forward(request, response);
else
request.getRequestDispatcher("fail.jsp").forward(request, response);
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body>
登录成功！！！
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body>
登录失败！！！
</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。
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head></head> <body> <form action="index1.jsp" method="post"> <input type="text" name="text"/> <input type="submit" value="提交"/> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body>
<%
String text = request.getParameter("text");
int n = Integer.parseInt(text);
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。
<%@ 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="id" /><br>
密码:<input type="password" name="password" /><br>
<input type="button" value="登录" style="margin-left: 100px" onclick="check()" />
<script type="text/javascript">
function check(){
if(login.id.value==""){
alert("账号不能为空");
return;
}
if(login.password.value==""){
alert("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 id=request.getParameter("id");
String password=request.getParameter("password");
if(id.equals(password)){
request.getRequestDispatcher("index2.jsp").forward(request, response);
}else{
out.print("登陆失败");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body> <%
request.setCharacterEncoding("utf-8");
String name = request.getParameter("id");
%>
登录成功到页面2！！！
<form action="index3.jsp" method="post">
用户姓名<input type="text" name="username" /><br>
<input type="submit" value="提交" />
<input type="hidden" name="src" value="<%=name%>" />
</form>
</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>
<%
request.setCharacterEncoding("utf-8");
String src = request.getParameter("src");
String name = request.getParameter("username");
%>
账号：<%=src%><br>
姓名：<%=name%>
</body>
</html>
标签：第七,登录,账号,value,密码,login,页面 来源： https://www.cnblogs.com/zhao1141754817/p/16155661.html
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