IOC 容器实例化的5钟方法

方法一：

Applicati＝onContext appContext=new FileSystemXmlApplicationContext("/src/applicationContext.xml");
   HuMan huMan=null;
   huMan= (HuMan) appContext.getBean("china");
   huMan.eat();
   huMan.walk();

方法二：

ClassPathXmlApplicationContext factory=new ClassPathXmlApplicationContext("applicationContext.xml");

方法三：

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

方法四：

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

方法五：

ApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"applicationContext.xml"});
BeanFactory factory = (BeanFactory) context;

两个主要容器

BeanFactory                   XmlBeanFactory                              

                                    FileSystemXmlApplicationContext

ApplicationContext           ClassPathXmlApplicationContext

                                    XmlWebApplicationContext

区别：

BeanFactory      延迟载入所有Bean,直到getBean()被调用才创建Bean。

ApplicationContext 启动后加载所有Bean