spring为ApplicationContext提供有三种实现（举例）

spring为ApplicationContext提供的3种实现分别为：ClassPathXmlApplicationContext，FileSystemXmlApplicationContext和XmlWebApplicationContext，其中XmlWebApplicationContext是专为Web工程定制的。使用举例如下：

1. FileSystemXmlApplicationContext
   eg1.
   ApplicationContext ctx = new FileSystemXmlApplicationContext("bean.xml"); //加载单个配置文件
   eg2.
   String[] locations = {"bean1.xml", "bean2.xml", "bean3.xml"};
   ApplicationContext ctx = new FileSystemXmlApplicationContext(locations ); //加载单个配置文件
   eg3.
   ApplicationContext ctx =new FileSystemXmlApplicationContext("D:/project/bean.xml");//根据具体路径加载文件

2. ClassPathXmlApplicationContext
   eg1.
   ApplicationContext ctx = new ClassPathXmlApplicationContext("bean.xml");
   eg2.
   String[] locations = {"bean1.xml", "bean2.xml", "bean3.xml"};
   ApplicationContext ctx = new ClassPathXmlApplication(locations);
   注：其中FileSystemXmlApplicationContext和ClassPathXmlApplicationContext与BeanFactory的xml文件定位方式一样是基于路径的。

3. XmlWebApplicationContext
   eg1.
   ServletContext servletContext = request.getSession().getServletContext();
   ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext);

摘自阿密果的blog，很有意思的签名：不骄、不矜、勤工、好学，才是好女子！