7
<%@ page contentType="text/html"%> <%@ page pageEncoding="utf-8"%> <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="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 contentType="text/html"%> <%@ page pageEncoding="utf-8"%> <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 %> </b> </p> </body> </html>
2.教材P97 实验2
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ pagecontentType="text/html" %>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'input.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;coloe: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" value="提交">
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ pagecontentType="text/html" %>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'input.jsp' starting page</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>
</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”。
<%@ 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 '5.jsp' starting page</title>
</head>
<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="6.jsp" method="post">
用户名:<input type="text" name="uname"><br> 密码: <input
type="password" name="upwd"> <br> 是否注册为会员：<input
type="checkbox" name="member" value="注册">注册 <input
type="checkbox" name="member" value="不注册">不注册<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 '6.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("7.jsp").forward(request,
response);
else
request.getRequestDispatcher("8.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 '7.jsp' starting page</title>
</head>
<p>登录成功！</p>
<%
request.setCharacterEncoding("utf-8");
String[] member = request.getParameterValues("member");
for (int i = 0; i < member.length; i++) {
if (member[i].equals("注册")) {
out.print("欢迎您注册为会员！");
}
}
%>
</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 '8.jsp' starting page</title>
</head>
<p>登录失败！</p>
</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"%>
<%
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 '9.jsp' starting page</title>
</head>
<form action="10.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>
<%@ 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 '10.jsp' starting page</title>
</head>
<%
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>
.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
<%@ 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 '11.jsp' starting page</title>
</head>
<script type="text/javascript">
function validate() {
if (loginForm.account.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="12.jsp" method="post">
账号:<input type="text" name="account"><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 '12.jsp' starting page</title>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String account = request.getParameter("account");
String password = request.getParameter("upwd");
if (account.equals(password))
request.getRequestDispatcher("13.jsp").forward(request,
response);
else
request.getRequestDispatcher("14.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 '13.jsp' starting page</title>
</head>
<p>登录成功！</p>
<%
request.setCharacterEncoding("utf-8");
String account = request.getParameter("account");
%>
<form action="15.jsp" method="post">
用户名：<input type="text" name="username"><br>
<br> <input type="submit" name="submit" value="提交"> <input
type="hidden" name="account" value="<%=account%>">
</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 '14.jsp' starting page</title>
</head>
<p>登录失败！</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 '15.jsp' starting page</title>
</head>
<%
request.setCharacterEncoding("utf-8");
String account = request.getParameter("account");
String uname = request.getParameter("username");
out.print("账号：" + account + "<br>" + "<br>"+"用户名：" + uname);
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>首页</title> 6 </head> 7 8 <body> 9 输入运算数，选择运算符号：<br> 10 <form action="jisuan.jsp"> 11 <input type="text" name="num1" > 12 <select name="fuhao"> 13 <option value="+">加 14 <option value="-">减 15 <option value="*">乘 16 <option value="/">除 17 </select> 18 <input type="text" name="num2" > 19 <br><input type="submit" value="提交"> 20 </form> 21 </body> 22 </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>首页</title> 6 </head> 7 8 <body> 9 <% 10 String num1 = request.getParameter("num1"); 11 String num2 = request.getParameter("num2"); 12 String fuhao = request.getParameter("fuhao"); 13 if (num1 == null || num2 == null || num1.length() == 0 14 || num2.length() == 0) { 15 response.sendRedirect("index.jsp"); 16 return; 17 } 18 try { 19 double a = Double.parseDouble(num1); 20 double b = Double.parseDouble(num2); 21 double r = 0; 22 if ("+".equals(fuhao)) { 23 r = a + b; 24 } else if ("-".equals(fuhao)) { 25 r = a - b; 26 } else if ("*".equals(fuhao)) { 27 r = a * b; 28 } else if ("/".equals(fuhao)) { 29 r = a / b; 30 } 31 out.print(a + "" + fuhao + "" + b + "=" + r); 32 } catch (Exception e) { 33 out.print("请输入正确的数字"); 34 } 35 %> 36 </body> 37 </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <!DOCTYPE HTML>
3 <html>
4 <head>
5 <title>登录</title>
6 </head>
7
8 <body>
9 <script>
10 function validate() {
11 if (form.uname.value == "") {
12 alert("账号不能为空!");
13 return;
14 }
15 if (form.password.value == "") {
16 alert("密码不能为空!");
17 return;
18 }
19 form.submit();
20 }
21 </script>
22 <form name="form" action="dologin.jsp" method="post">
23 用户名:<input type="text" name="uname"><br> 密码: <input
24 type="password" name="password"> <br> 验证码： <input
25 type="text" name="checkcode" size="4" />
26 <!-- 验证码-->
27 <img src="img.jsp" /><br>
28 <input type="button" value="登录" onClick="validate()">
29 </form>
30 </body>
31 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <%
3 request.setCharacterEncoding("utf-8");
4 %>
5 <!DOCTYPE HTML>
6 <html>
7 <head>
8 <title></title>
9 </head>
10 <body>
11 <%
12 String uname = request.getParameter("uname");
13 String password = request.getParameter("password");
14 String checkcode = request.getParameter("checkcode");
15 session = request.getSession();
16 String realcode = (String)session.getAttribute("checkcode");
17 if (uname.equals(password)&&checkcode.equals(realcode)) {
18 request.getRequestDispatcher("true.jsp").forward(request,
19 response);
20 } else {
21 request.getRequestDispatcher("false.jsp").forward(request,
22 response);
23 }
24 %>
25 </body>
26 </html>
1 <%@page import="javax.imageio.ImageIO"%>
2 <%@page import="java.awt.image.BufferedImage"%>
3 <%@ page import="java.awt.*"%>
4 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
5
6 <%!public Color getColor() {
7 Random ran = new Random();
8 int R = ran.nextInt(255);
9 int G = ran.nextInt(255);
10 int B = ran.nextInt(255);
11 return new Color(R, G, B);
12 }
13
14 public String codeGenerate() {
15 int code = (int) (Math.random() * 9000 + 1000);
16 return String.valueOf(code);
17 }%>
18 <%
19 response.setHeader("Pragma", "no-cache");
20 response.setHeader("Cache-Control", "no-cache");
21 response.setHeader("Expires", "0");
22 BufferedImage image = new BufferedImage(80, 30,
23 BufferedImage.TYPE_INT_RGB);
24 Graphics pen = image.getGraphics();
25 pen.fillRect(0, 0, 80, 30);
26 pen.setFont(new Font("seif", Font.BOLD, 20));
27 pen.setColor(Color.BLACK);
28 String checkCode = codeGenerate();
29 StringBuffer sb = new StringBuffer();
30 for (int i = 0; i < checkCode.length(); i++) {
31 sb.append(checkCode.charAt(i) + " ");
32 }
33 pen.drawString(sb.toString(), 15, 20);
34 for (int i = 0; i < 20; i++) {
35 Random ran = new Random();
36 int xBegin = ran.nextInt(80);
37 int yBegin = ran.nextInt(30);
38 int xEnd = ran.nextInt(xBegin + 15);
39 int yEnd = ran.nextInt(yBegin + 15);
40 pen.setColor(getColor());
41 pen.drawLine(xBegin, yBegin, xEnd, yEnd);
42 }
43 session.setAttribute("checkcode", checkCode);
44 ImageIO.write(image, "jpeg", response.getOutputStream());
45 out.clear();
46 out = pageContext.pushBody();
47 %>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title></title> 6 </head> 7 <body> 8 <h2>登录成功</h2> 9 </body> 10 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title></title> 6 </head> 7 <body> 8 <h2>登录失败</h2> 9 </body> 10 </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”。
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <!DOCTYPE HTML>
3 <html>
4 <head>
5 <title>注册会员</title>
6 </head>
7 <body>
8 <script>
9 function validate() {
10 if (form.uname.value == "") {
11 alert("账号不能为空!");
12 return;
13 }
14 if (form.password.value == "") {
15 alert("密码不能为空!");
16 return;
17 }
18 form.submit();
19 }
20 </script>
21
22 <form name="form" action="../code03/dologin.jsp" method="post">
23 用户名:<input type="text" name="uname"><br> 密码: <input
24 type="password" name="password"> <br> 是否注册为会员：<input
25 type="checkbox" name="member" value="注册">注册 <input
26 type="checkbox" name="member" value="不注册">不注册<br>
27 验证码： <input type="text" name="checkcode" size="4" />
28 <!-- 验证码-->
29 <img src="../code03/img.jsp" /><br>
30 <input type="button" value="登录" onClick="validate()">
31
32 </form>
33 </body>
34 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <%
3 request.setCharacterEncoding("utf-8");
4 %>
5 <!DOCTYPE HTML>
6 <html>
7 <head>
8 <title></title>
9 </head>
10 <body>
11 <%
12 String uname = request.getParameter("uname");
13 String password = request.getParameter("password");
14 String checkcode = request.getParameter("checkcode");
15 session = request.getSession();
16 String realcode = (String)session.getAttribute("checkcode");
17 if (uname.equals(password)&&checkcode.equals(realcode)) {
18 request.getRequestDispatcher("true.jsp").forward(request,
19 response);
20 } else {
21 request.getRequestDispatcher("false.jsp").forward(request,
22 response);
23 }
24 %>
25 </body>
26 </html>
1 <%@page import="javax.imageio.ImageIO"%>
2 <%@page import="java.awt.image.BufferedImage"%>
3 <%@ page import="java.awt.*"%>
4 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
5
6 <%!public Color getColor() {
7 Random ran = new Random();
8 int R = ran.nextInt(255);
9 int G = ran.nextInt(255);
10 int B = ran.nextInt(255);
11 return new Color(R, G, B);
12 }
13
14 public String codeGenerate() {
15 int code = (int) (Math.random() * 9000 + 1000);
16 return String.valueOf(code);
17 }%>
18 <%
19 response.setHeader("Pragma", "no-cache");
20 response.setHeader("Cache-Control", "no-cache");
21 response.setHeader("Expires", "0");
22 BufferedImage image = new BufferedImage(80, 30,
23 BufferedImage.TYPE_INT_RGB);
24 Graphics pen = image.getGraphics();
25 pen.fillRect(0, 0, 80, 30);
26 pen.setFont(new Font("seif", Font.BOLD, 20));
27 pen.setColor(Color.BLACK);
28 String checkCode = codeGenerate();
29 StringBuffer sb = new StringBuffer();
30 for (int i = 0; i < checkCode.length(); i++) {
31 sb.append(checkCode.charAt(i) + " ");
32 }
33 pen.drawString(sb.toString(), 15, 20);
34 for (int i = 0; i < 20; i++) {
35 Random ran = new Random();
36 int xBegin = ran.nextInt(80);
37 int yBegin = ran.nextInt(30);
38 int xEnd = ran.nextInt(xBegin + 15);
39 int yEnd = ran.nextInt(yBegin + 15);
40 pen.setColor(getColor());
41 pen.drawLine(xBegin, yBegin, xEnd, yEnd);
42 }
43 session.setAttribute("checkcode", checkCode);
44 ImageIO.write(image, "jpeg", response.getOutputStream());
45 out.clear();
46 out = pageContext.pushBody();
47 %>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <%
3 request.setCharacterEncoding("utf-8");
4 %>
5 <!DOCTYPE HTML>
6 <html>
7 <head>
8 <title></title>
9 </head>
10 <body>
11 <h2>登录成功</h2>
12 <%
13 String[] member = request.getParameterValues("member");
14 for (int i = 0; i < member.length; i++) {
15 if (member[i].equals("注册")) {
16 out.print("欢迎您注册为会员！");
17 }
18 }
19 %>
20 </body>
21 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title></title> 6 </head> 7 <body> 8 <h2>登录失败</h2> 9 </body> 10 </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。
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title>登录</title> 6 </head> 7 <body> 8 <form action="print.jsp" method="post"> 9 请输入数字：<input type="text" name="number" size=10><br> 10 <input type="submit" name="submit" value="提交"> 11 </form> 12 </body> 13 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <%
3 request.setCharacterEncoding("utf-8");
4 %>
5 <!DOCTYPE HTML>
6 <html>
7 <head>
8 <title>登录</title>
9 </head>
10 <body>
11 <%
12 String number = request.getParameter("number");
13 int a = Integer.parseInt(number);
14 for (int i = 0; i < a; i++) {
15 out.print("欢迎" + "<br>");
16 }
17 %>
18 </body>
19 </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。
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <!DOCTYPE HTML>
3 <html>
4 <head>
5 <title>登录</title>
6 </head>
7 <body>
8 <script>
9 function validate() {
10 if (form.account.value == "") {
11 alert("账号不能为空!");
12 return;
13 }
14 if (form.password.value == "") {
15 alert("密码不能为空!");
16 return;
17 }
18 form.submit();
19 }
20 </script>
21
22 <form name="form" action="dologin.jsp" method="post">
23 账号:<input type="text" name="account"><br> 密码: <input
24 type="password" name="password"> <br> <input type="button"
25 value="登录" onClick="validate()">
26
27 </form>
28 </body>
29 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <%
3 request.setCharacterEncoding("utf-8");
4 %>
5 <!DOCTYPE HTML>
6 <html>
7 <head>
8 <title>登录</title>
9 </head>
10 <body>
11 <%
12 String account = request.getParameter("account");
13 String password = request.getParameter("password");
14 if (account.equals(password)) {
15 request.getRequestDispatcher("true.jsp").forward(request,
16 response);
17 } else {
18 request.getRequestDispatcher("false.jsp").forward(request,
19 response);
20 }
21 %>
22 </body>
23 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <%
3 request.setCharacterEncoding("UTF-8");
4 %>
5 <!DOCTYPE HTML>
6 <html>
7 <head>
8 <title></title>
9 </head>
10 <body>
11 <h2>登录成功</h2>
12 <%
13 String account = request.getParameter("account");
14 %>
15 <form action="show.jsp" method="post">
16 用户名：<input type="text" name="username"><br> <br> <input
17 type="submit" name="submit" value="提交"> <input type="hidden"
18 name="account" value="<%=account%>">
19 </form>
20 </body>
21 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <!DOCTYPE HTML> 3 <html> 4 <head> 5 <title></title> 6 </head> 7 <body> 8 <h2>登录失败</h2> 9 </body> 10 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2 <%
3 request.setCharacterEncoding("utf-8");
4 %>
5 <!DOCTYPE HTML>
6 <html>
7 <head>
8 <title></title>
9 </head>
10 <body>
11 <%
12 String account = request.getParameter("account");
13 String uname = request.getParameter("username");
14 out.print("账号：" + account + "<br>" + "<br>" + "用户名：" + uname);
15 %>
16 </bod
