Spring如何获得容器对象

1.在classpath路径下寻找

ApplicationContext ac = new ClassPathXmlApplicationContext("cn/itcast/spring/d_applicationContext/applicationContext_dao.xml");

2.

配置文件和Main这个类在同一个包中

ApplicationContext ac2 = new ClassPathXmlApplicationContext("applicationContext_dao.xml", Main.class);

3.有多个配置文件的情况

ApplicationContext ac = new ClassPathXmlApplicationContext(new String[] {//
                "cn/itcast/spring/d_applicationContext/applicationContext_service.xml",//
                        "cn/itcast/spring/d_applicationContext/applicationContext_dao.xml" });

我们知道service会依赖dao，那么是不是意味着与配置文件读取的顺序有关呢？

ApplicationContext ac = new ClassPathXmlApplicationContext(new String[] {//
                "cn/itcast/spring/d_applicationContext/applicationContext_dao.xml",//
                        "cn/itcast/spring/d_applicationContext/applicationContext_service.xml" });

这样也是可以的，它会自己处理依赖关系。它会自动初始化那些被依赖的对象。

4.

ApplicationContext ac2 = new ClassPathXmlApplicationContext(new String[] {//
                "applicationContext_dao.xml", "applicationContext_service.xml" },Main.class);