spring为ApplicationContext提供有三种实现

原文链接：http://houston123.iteye.com/blog/1559446

参考链接：http://blog.csdn.net/souichiro/article/details/6068552

  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 

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