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 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 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秒後重新登錄
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~
