jsp登錄頁面的簡單實例 雛形
%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
title>歡迎頁面/title>
/head>
body>
%
session.invalidate();//銷毀session
%>
a href="denglu.jsp" >親，請登錄/a>
a href="zhuce.jsp">注冊/a>
/body>
/html>
歡迎界面：
尚未注冊，直接登錄的時候：
%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
title>登錄/title>
/head>
body>
form action="test_denglu.jsp" method="post">
table width="300" height="300" border="0" align="center">
tr height="80" align="center">
td colspan="2">font size="24">OO登錄/font>/td>/tr>
tr height="30">
td width="80" align="right">用戶名：/td>
td>input type="text" name="username">/td>/tr>
tr height="30">
td width="80" align="right"> 密nbsp;nbsp;碼：/td>
td> input type="password" name="password">/td>/tr>
tr>td height="40" align="center" colspan="2">
input type="submit" value="登錄">
/td>/tr>
/table>
/form>
/body>
/html>
進入注冊界面：
%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
title>注冊/title>
/head>
body>
form action="test_zhuce.jsp" method="post">
table width="300" height="300" border="0" align="center">
tr height="80" align="center">
td colspan="2">font size="24">OO注冊/font>/td>/tr>
tr height="30">
td width="80" align="right">用戶名：/td>
td>input type="text" name="username">/td>/tr>
tr height="30">
td width="80" align="right"> 密nbsp;nbsp;碼：/td>
td> input type="password" name="password">/td>/tr>
tr>td height="40" align="center" colspan="2">
input type="submit" value="提交">
/td>/tr>
/table>
/form>
/body>
/html>
注冊成功，跳轉登錄界面：
%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" import="java.sql.*"%>
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
title>檢測跳轉中/title>
/head>
body>
%
String name = new String(request.getParameter("username").getBytes("ISO-8859-1"),"UTF-8");
String pw = request.getParameter("password");
String str = "select * from USERS WHERE username = '" + name + "'";
String str1 = "insert into users values(xuhao.nextval,'" + name + "','" + pw +"')";
try{
//連接數據庫
Connection conn = null;
Class.forName("oracle.jdbc.driver.OracleDriver");
String strURL = "jdbc:oracle:thin:@localhost:1521:SP";
conn = DriverManager.getConnection(strURL, "test", "123");
System.out.println("數據庫連接成功");
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery(str);
if(rs.next()){
if(name.equals(rs.getString(2))){
out.println("對不起，用戶名已使用。");
out.println("br>建議使用用戶名：" + name +"99");
response.setHeader("refresh", "5;URL=zhuce.jsp");
}
}else{
int a = st.executeUpdate(str1);
if(a == 1){
out.println("恭喜你，注冊成功");
session.setAttribute("username", name);
response.setHeader("refresh", "3;URL=denglu.jsp");
}
}
rs.close();
st.close();
conn.close();
}catch(Exception e){
e.printStackTrace();
}
%>
br>br>
/body>
/html>
登錄時，密碼出錯：5秒后重新登錄
賬號密碼輸入正確，進入主頁面：
%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
title>主頁面/title>
/head>
body>
主頁面
%
Object obj = session.getAttribute("username");
if(obj != null){
String str = obj.toString();
out.println(str + "登陸成功");
}else{
out.println("登錄超時，請重新登錄");
response.setHeader("refresh", "5;URL=denglu.jsp");
}
%>
br>
a href="yemian.jsp">退出賬號/a>
/body>
/html>
以上就是小編為大家帶來的jsp登錄頁面的簡單實例 雛形全部內容了，希望大家多多支持腳本之家~
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