<%@ page contentType="text/html;charset=gb2312" pageEncoding="gb2312" %>
<html>
<head>
<title>Shopping123</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<link href="https://www.jb51.net/styles/shoppingstyle.css" type="text/css">
</head>
<body bgcolor="#FFFFFF" leftmargin="0" topmargin="0">
<jsp:useBean scope="page"/>
<%
boolean login = checklogin.check(request,response);
%>
<table cellpadding="0" cellspacing="0">
<tr bgcolor="#990000">
<td colspan="5"><table cellpadding="0" cellspacing="0">
<tr>
<td> </td>
<td>Shopping123</td>
<td> </td>
</tr>
</table></td>
</tr>
<tr>
<td valign="top"><table cellpadding="0" cellspacing="0">
<tr>
<td> </td>
</tr>
</table>
<%
if(!login){
%>
<table cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<form method="post" action="/servlet/login">
<tr bgcolor="#CCCCCC">
<td colspan="2">卖场入口</td>
</tr>
<tr>
<td bgcolor="#FFFFFF">会员</td>
<td bgcolor="#FFFFFF"><input type="text" size="10"></td>
</tr>
<tr>
<td bgcolor="#FFFFFF">密码</td>
<td bgcolor="#FFFFFF"><input type="text" size="10"></td>
</tr>
<tr>
<td bgcolor="#FFFFFF"><a href="https://www.jb51.net/reg.jsp" target="_blank">注册</a></td>
<td bgcolor="#FFFFFF"><input type="submit" value="进入"></td>
</tr>
</form>
</table>
<%
}
else
{
out.println("您好，" + checklogin.getUserName() + "!");
}
%>
</td>
<td valign="top" bgcolor="#CCCCCC"></td>
<td> </td>
<td valign="top" bgcolor="#CCCCCC"></td>
<td> </td>
</tr>
<tr bgcolor="#990000">
<td colspan="5">copyright© 2003 Shopping123</td>
</tr>
</table>
</body>
</html>
reg.jsp<%@ page contentType="text/html;charset=gb2312" pageEncoding="gb2312" %>
<html>
<head>
<title>Shopping123</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<link href="https://www.jb51.net/styles/shoppingstyle.css" type="text/css">
</head>
<body bgcolor="#FFFFFF" leftmargin="0" topmargin="0">
<table cellpadding="0" cellspacing="0">
<tr bgcolor="#990000">
<td colspan="5"><table cellpadding="0" cellspacing="0">
<tr>
<td> </td>
<td>Shopping123</td>
<td> </td>
</tr>
</table></td>
</tr>
<tr>
<td valign="top"> </td>
<td valign="top"></td>
<td valign="top"><table cellpadding="0" cellspacing="0">
<tr>
<td> </td>
</tr>
</table>
<table cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<form action="regpost.jsp" method="post">
<tr>
<td colspan="2" bgcolor="#CCCCCC">会员注册</td>
</tr>
<tr>
<td bgcolor="#FFFFFF">会员</td>
<td bgcolor="#FFFFFF"><input type="text" size="16"></td>
</tr>
<tr>
<td bgcolor="#FFFFFF">密码</td>
<td bgcolor="#FFFFFF"><input type="password" size="16"></td>
</tr>
<tr>
<td bgcolor="#FFFFFF">验证密码</td>
<td bgcolor="#FFFFFF"><input type="password" size="16"></td>
</tr>
<tr>
<td bgcolor="#FFFFFF">E-mail</td>
<td bgcolor="#FFFFFF"><input type="text" size="16"></td>
</tr>
<tr>
<td bgcolor="#FFFFFF"><input type="submit" value="重写"></td>
<td bgcolor="#FFFFFF"><input type="submit" value="注册"></td>
</tr>
</form>
</table></td>
<td valign="top"></td>
<td> </td>
</tr>
<tr bgcolor="#990000">
<td colspan="5">copyright© 2003 Shopping123</td>
</tr>
</table>
</body>
</html>
regpost.jsp：注册表单提交页面<%@ page contentType="text/html;charset=gb2312" pageEncoding="gb2312" %>
<%@ page import="reg"%>
<html>
<head>
<title>Shopping123</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<link href="https://www.jb51.net/styles/shoppingstyle.css" type="text/css">
</head>
<body bgcolor="#FFFFFF" leftmargin="0" topmargin="0">
<%
String username = new String(request.getParameter("username").getBytes("ISO8859_1")).trim();
String password = new String(request.getParameter("password").getBytes("ISO8859_1")).trim();
String confirm = new String(request.getParameter("confirm").getBytes("ISO8859_1")).trim();
String email = new String(request.getParameter("email").getBytes("ISO8859_1")).trim();
%>
<table cellpadding="0" cellspacing="0">
<tr bgcolor="#990000">
<td colspan="5"><table cellpadding="0" cellspacing="0">
<tr>
<td> </td>
<td>Shopping123</td>
<td> </td>
</tr>
</table></td>
</tr>
<tr>
<td valign="top"> </td>
<td valign="top"></td>
<td valign="top">
<table cellpadding="0" cellspacing="0">
<tr>
<td> </td>
</tr>
</table>
<jsp:useBean scope="session"/>
<%
if(regID.reg(username,password,confirm,email))
{
out.print("ok");
String newID = regID.getID() + ";
%>
<table cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td colspan="2" bgcolor="#CCCCCC">恭喜您，注册成功！</td>
</tr>
<tr>
<td bgcolor="#FFFFFF">编号</td>
<td bgcolor="#FFFFFF"><%=newID%></td>
</tr>
<tr>
<td bgcolor="#FFFFFF">会员</td>
<td bgcolor="#FFFFFF"><%=username%></td>
</tr>
<tr>
<td bgcolor="#FFFFFF">密码</td>
<td bgcolor="#FFFFFF"><%=password%></td>
</tr>
<tr>
<td bgcolor="#FFFFFF">E-mail</td>
<td bgcolor="#FFFFFF"><%=email%></td>
</tr>
</table>
<%
out.print("<br>");
out.print("<a href=javascript:window.close()>关闭</a>");
}else{
out.print("注册失败！<br>");
out.print("该用户名已有人使用，请使用另外的用户名！");
out.print("<a href=javascript:history.go(-1)>返回</a>");
}
%>
</td>
<td valign="top"></td>
<td> </td>
</tr>
<tr bgcolor="#990000">
<td colspan="5">copyright© 2003 Shopping123</td>
</tr>
</table>
</body>
</html>
至此，我们已经完成了一个用户注册、登录的系统。 因为这是本人自己边学边做完成的，所以代码一定有很多不完善的地方，欢迎大家批评指正。 以上所有代码均经本人测试通过。
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