1.获取前台用户名密码（id,code)；
2.读取后台用户名密码（yhm,mm)；
现在想通过对比完成登陆操作 请问这部分代码应该怎么写呢（最好带说明）
登录login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'login.jsp' starting page</title>
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form name="loginForm" action="loginAction.jsp" method="post">
用户名:<input type="text" name="username"/><br/>
密码:<input type="text" name="password"/><br/>
<input type="submit" value="提交"/>
<input type="reset" value="重置"/>
</form>
</body>
</html>
处理表单loginAction.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
String username=request.getParameter("username");
String password=request.getParameter("password");
if(username.equals("admin")&&password.equals("admin")){ //这里是模拟,实际和数据库打交道
response.sendRedirect("index.jsp");//跳转到你要的界面
}else{
response.sendRedirect("login.jsp");
}
%>