spring為ApplicationContext提供有三種實現

spring為ApplicationContext提供的3種實現分別為：ClassPathXmlApplicationContext，FileSystemXmlApplicationContext和XmlWebApplicationContext，其中XmlWebApplicationContext是專為Web工程定製的。使用舉例如下：

  1. FileSystemXmlApplicationContext       eg1. ApplicationContext ctx = new FileSystemXmlApplicationContext("bean.xml"); //載入單個設定檔       eg2.                String[] locations = {"bean1.xml", "bean2.xml", "bean3.xml"};               ApplicationContext ctx = new FileSystemXmlApplicationContext(locations ); //載入單個設定檔       eg3.         ApplicationContext ctx =new FileSystemXmlApplicationContext("D:/project/bean.xml");//根據具體路徑負載檔案  2. ClassPathXmlApplicationContext       eg1.  ApplicationContext ctx = new ClassPathXmlApplicationContext("bean.xml");       eg2.                String[] locations = {"bean1.xml", "bean2.xml", "bean3.xml"};               ApplicationContext ctx = new ClassPathXmlApplication(locations);       註：其中FileSystemXmlApplicationContext和ClassPathXmlApplicationContext與BeanFactory的xml檔案定位方式一樣是基於路徑的。 3. XmlWebApplicationContext   eg1. ServletContext servletContext = request.getSession().getServletContext();            ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext);