一个简单的JSP登陆代码

来源：互联网发布：effective java mobi 编辑：程序博客网时间：2024/06/04 23:36

源代码

一个简单的JSP登陆代码

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<%@ page contentType="text/html; charset=GBK" %> <jsp:useBean id="Dl" scope="request" class="dlxx.Dl" /> <%@ page import="java.sql.*" %> <%@ page import="sun.jdbc.rowset.*;" %> <%request.setCharacterEncoding("GBK");%> <%//得到隐藏域的值 String doCreate = request.getParameter("doCreate"); String uname = request.getParameter("uname");String psw = request.getParameter("psw");if (doCreate==null){doCreate="false";} //这说明提交过来了数据 if (doCreate.equals("true")) { //执行增加操作，要判断主键是否重复－1， CachedRowSet resultPage=null; resultPage=Dl.getRowSet("select * from dl where uname='"+uname+"'"); if (resultPage.next()){ resultPage=Dl.getRowSet("select * from dl where uname='"+uname+"' and psw='"+psw+"'"); if (resultPage.next()){ //登陆成功处理 String tname=resultPage.getString("tname"); session.setAttribute("tname", tname); session.setAttribute("uname", uname); response.sendRedirect("index.htm"); return; } } %> <script language="javascript"> alert("用户名或者密码错误!"); history.back(); </script> <%

} %>

<html> <head> <title>系统页面登陆</title> <META http-equiv=Content-Type content="text/html; charset=GBK"> <script language="JavaScript" src="calendar.js"></Script> <link href="images/server.css" rel="stylesheet" type="text/css"> <style type="text/css">  </style> <script language="javascript"> function checkInput() { if (document.dlym.uname.value==""){ alert("请输入用户名！"); document.dlym.uname.focus(); return false;} if (document.dlym.psw.value==""){ alert("请输入密码！"); document.dlym.psw.focus(); return false;} return true; } </script> </head> <body background="images/index_17.gif" leftmargin="000" topmargin="0"><form name="dlym" method="POST" action="dlym.jsp" onSubmit="return checkInput();" > <table width="100%" border="0" cellpadding="0" cellspacing="0" background="images/TYPE_BG.gif"> <tr> <td height=26></td></tr> </table> <br> <table align="center" border="1" cellspacing="0" style="border-collapse: collapse" bordercolor="#D6E6F0" cellpadding="6"> <tr><td colspan="2" background="IMAGES/bac.gif"><div align="center"><b> 登陆信息</b></div></td> </tr> <tr> <td width="69">用户名:</td> <td width="124"> <input name="uname" type="text" size="15" maxlength="15"> </td></tr> <tr> <td>密码:</td> <td width="124"> <input name="psw" type="password" size="15" maxlength="15" > </td></tr><tr> <td height="25" align="center" colspan="2" > <input type="submit" value="确定" name="Submit" > <input type="hidden" name="doCreate" value="true"> <input type="reset" value="取消" name="Submit2"> </td></tr> </table> <br></td></tr> </table> </form> </html>