jsp登入頁面的簡單一實例 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，請登入</a><a href="zhuce.jsp">註冊</a></body></html>
歡迎介面：
尚未註冊，直接登入的時候：
<%@ 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>登入</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登入</font></td></tr> <tr height="30"> <td width="80" align="right">使用者名稱：</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="登入"> </td></tr> </table></form></body></html>
進入註冊介面：
<%@ 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>註冊</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註冊</font></td></tr> <tr height="30"> <td width="80" align="right">使用者名稱：</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>
註冊成功，跳轉登入介面：
<%@ 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{ //串連資料庫 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("資料庫連接成功"); Statement st = conn.createStatement(); ResultSet rs = st.executeQuery(str); if(rs.next()){ if(name.equals(rs.getString(2))){ out.println("對不起，使用者名稱已使用。"); out.println("<br>建議使用使用者名稱：" + name +"99"); response.setHeader("refresh", "5;URL=zhuce.jsp"); } }else{ int a = st.executeUpdate(str1); if(a == 1){ out.println("恭喜你，註冊成功"); 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>
登入時，密碼出錯：5秒後重新登入
帳號密碼輸入正確，進入首頁面：
<%@ 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>首頁面</title></head><body>首頁面<%Object obj = session.getAttribute("username");if(obj != null){ String str = obj.toString(); out.println(str + "登陸成功");}else{ out.println("登入逾時，請重新登入"); response.setHeader("refresh", "5;URL=denglu.jsp");}%><br><a href="yemian.jsp">退出帳號</a></body></html>
以上就是小編為大家帶來的jsp登入頁面的簡單一實例 雛形全部內容了，希望大家多多支援雲棲社區~
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
