spring为ApplicationContext提供有三种实现

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

?

eg2.

String[] locations = {"bean1.xml", "bean2.xml", "bean3.xml"};

ApplicationContext ctx = new FileSystemXmlApplicationContext(locations ); //加载多个配置文件

eg3.

ApplicationContext ctx =new FileSystemXmlApplicationContext("D:roject/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);