📄 dologin.jsp
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<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<jsp:directive.page import="ss06.sl.pj3.*" />
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<title>Dologin</title>
</head>
<body>
<% request.setCharacterEncoding("GB2312");
DBUtil dbutil = DBUtil.getInstance();
dbutil.connect2DB();
String username;
try {
if(session.getAttribute("username") == null){
session.setAttribute("username", request.getParameterValues("userName")[0]);
session.setAttribute("password", request.getParameterValues("password")[0]);
username = session.getAttribute("username").toString();
String password = session.getAttribute("password").toString();
username = dbutil.checkUser(username, password);
}else{
username = session.getAttribute("username").toString();
}
} catch (Exception e) {
username = null;
}
if (username != null) {
session.setAttribute("username", username);
session.setAttribute("role", dbutil.getRole(username));
session.setAttribute("shoppingcart", null);
if(dbutil.getRole(username).equals("admin")){
response.sendRedirect("adminIndex.jsp");
}else{
response.sendRedirect("userIndex.jsp");
}
}else{
out.println("用户名或密码有误！<br>");
out.println("<a href=\"javascript:history.back();\">返回登录页面</a>");
session.invalidate();
}
%>
</body>
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