Spring加载xml配置文件的方式

Spring加载xml配置文件的方式：
    XmlBeanFactory
    ClassPathXmlApplicationContext
    FileSystemXmlApplicationContext
    XmlWebApplicationContext
 
1.XmlBeanFactory

Resource resource = new ClassPathResource("appcontext.xml"); 
BeanFactory factory = new XmlBeanFactory(resource);

2. ClassPathXmlApplicationContext

ApplicationContext factory=new ClassPathXmlApplicationContext("classpath:appcontext.xml");
ApplicationContext factory=new ClassPathXmlApplicationContext("appcontext.xml");    // src目录下或resources
ApplicationContext factory=new ClassPathXmlApplicationContext("conf/appcontext.xml");   // src/conf 目录下
ApplicationContext factory=new ClassPathXmlApplicationContext("file:G:/Test/src/appcontext.xml"); 

3. FileSystemXmlApplicationContext

ApplicationContext factory=new FileSystemXmlApplicationContext("src/appcontext.xml");      
//使用了 classpath:  前缀,作为标志,  这样,FileSystemXmlApplicationContext 也能够读入classpath下的相对路径 
ApplicationContext factory=new FileSystemXmlApplicationContext("classpath:appcontext.xml"); 
ApplicationContext factory=new FileSystemXmlApplicationContext("file:G:/Test/src/appcontext.xml"); 
ApplicationContext factory=new FileSystemXmlApplicationContext("G:/Test/src/appcontext.xml"); 

4. XmlWebApplicationContext （专为Web工程定制的）

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