spring中有哪几种加载ApplicationContext.xml的方式呢？

spring 中加载xml配置文件的方式
 有4种,分别为：
   XmlBeanFactory,
   ClassPathXmlApplicationContext,
   FileSystemXmlApplicationContext,
   XmlWebApplicationContext
 

一:XmlBeanFactory 引用资源

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

二:ClassPathXmlApplicationContext 编译路径

  
    ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml","dao.xml"});
    ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/*.xml");
 
    ApplicationContext factory=new ClassPathXmlApplicationContext("classpath:appcontext.xml");
    ApplicationContext factory=new ClassPathXmlApplicationContext("appcontext.xml");   // src目录下的
    ApplicationContext factory=new ClassPathXmlApplicationContext("conf/appcontext.xml");   // src/conf 目录下的
    ApplicationContext factory=new ClassPathXmlApplicationContext("file:G:/Test/src/appcontext.xml");
    RegisterDAO registerDAO = (RegisterDAO)ac.getBean("RegisterDAO");

三:用文件系统的路径

ApplicationContext factory=new FileSystemXmlApplicationContext("src/appcontext.xml");
    //使用classpath:前缀,作为标志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:D:/Test/src/appcontext.xml");
    ApplicationContext factory=new FileSystemXmlApplicationContext("D:/Test/src/appcontext.xml");

四: XmlWebApplicationContext 是专为Web工程定制的

 
    ServletContext servletContext = request.getSession().getServletContext(); 
    ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext ); 
 classpath:前缀是不需要的
     默认就是指项目的classpath路径下面
	 如果要使用绝对路径,需要加上file:前缀表示这是绝对路径;