方式一：通過上下文
<?xml version="1.0" encoding="utf-8" ?>
<%@ page language="java" contenttype="text/html; charset=utf-8"
pageencoding="utf-8"%>
<%@page import="org.springframework.web.context.support.webapplicationcontextutils"%>
<%@page import="org.springframework.context.applicationcontext"%>
<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>insert title here</title>
</head>
<body>
<%
servletcontext context = request.getsession().getservletcontext();
applicationcontext ctx = webapplicationcontextutils.getwebapplicationcontext(context);
object <span style="font-size: 1em; line-height: 1.5;">supermarketdao</span><span style="font-size: 1em; line-height: 1.5;">= ctx.getbean("supermarketdao");</span>
system.out.println("jsp:"+<span style="font-size: 1em; line-height: 1.5;">supermarketdao</span><span style="font-size: 1em; line-height: 1.5;">);</span>
%>
</body>
</html>
問題：jsp頁面中擷取的bean與spring 容器中的bean是同一個嗎？
是的。
方式二：通過類路徑加載bean檔案,得到bean工廠
<%@page import="org.springframework.beans.factory.beanfactory"%>
<%@page import="org.springframework.context.support.classpathxmlapplicationcontext"%>
classpathxmlapplicationcontext appcontext = new classpathxmlapplicationcontext("beans.xml","user_beans.xml","goods_beans.xml","supermarket_beans.xml","aop.xml","upload_beans.xml");
beanfactory factory = (beanfactory) appcontext;
object obj=factory.getbean("supermarketdao");
system.out.println("jsp2:"+obj);
問題：jsp頁面中擷取的bean與spring 容器中的bean是同一個嗎？
不是的。
總結：（1）通過webapplicationcontextutils 擷取bean是直接從spring容器中拿的；
（2）通過classpathxmlapplicationcontext，實際上又解析了一遍xml，即又建立了一個新的spring容器，所有擷取的bean與web上下文中是不同的。
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