jsp登录页面的简单实例 雏形
<%@ 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>欢迎页面</title> </head> <body> <% session.invalidate();//销毁session %> <a href=\"denglu.jsp\" >亲,请登录</a> <a href=\"zhuce.jsp\">注册</a> </body> </html>
欢迎界面:
尚未注册,直接登录的时候:
<%@ 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>登录</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登录</font></td></tr> <tr height=\"30\"> <td width=\"80\" align=\"right\">用户名:</td> <td><input type=\"text\" name=\"username\"></td></tr> <tr height=\"30\"> <td width=\"80\" align=\"right\"> 密 码:</td> <td> <input type=\"password\" name=\"password\"></td></tr> <tr><td height=\"40\" align=\"center\" colspan=\"2\"> <input type=\"submit\" value=\"登录\"> </td></tr> </table> </form> </body> </html>
进入注册界面:
<%@ 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>注册</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注册</font></td></tr> <tr height=\"30\"> <td width=\"80\" align=\"right\">用户名:</td> <td><input type=\"text\" name=\"username\"></td></tr> <tr height=\"30\"> <td width=\"80\" align=\"right\"> 密 码:</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>
注册成功,跳转登录界面:
<%@ 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>检测跳转中</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{ //连接数据库 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(\"数据库连接成功\"); Statement st = conn.createStatement(); ResultSet rs = st.executeQuery(str); if(rs.next()){ if(name.equals(rs.getString(2))){ out.println(\"对不起,用户名已使用。\"); out.println(\"<br>建议使用用户名:\" + name +\"99\"); response.setHeader(\"refresh\", \"5;URL=zhuce.jsp\"); } }else{ int a = st.executeUpdate(str1); if(a == 1){ out.println(\"恭喜你,注册成功\"); 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>
登录时,密码出错:5秒后重新登录
账号密码输入正确,进入主页面:
<%@ 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>主页面</title> </head> <body> 主页面 <% Object obj = session.getAttribute(\"username\"); if(obj != null){ String str = obj.toString(); out.println(str + \"登陆成功\"); }else{ out.println(\"登录超时,请重新登录\"); response.setHeader(\"refresh\", \"5;URL=denglu.jsp\"); } %> <br> <a href=\"yemian.jsp\">退出账号</a> </body> </html>
以上就是小编为大家带来的jsp登录页面的简单实例 雏形全部内容了,希望大家多多支持phpstudy~
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