四种方式

• ClassPathXmlApplicationContext
• FileSystemXmlApplicationContext
• AnnotationConfigApplicationContext
• EmbeddWebApplicationContext

• [1] ClassPathXmlApplicationContext
• [2] FileSystemXmlApplicationContext
• [3] AnnotationConfigApplicationContext
• [4] Embeddedwebapplicationcontext

[1] ClassPathXmlApplicationContext

类路径获取配置文件：ClassPathXmlApplicationContext

ApplicationContext applicationContext = 
    new ClassPathXmlApplicationContext("spring.xml");

[2] FileSystemXmlApplicationContext

文件系统路径获取配置文件[绝对路径]：FileSystemXmlApplicationContext

ApplicationContext applicationContext = 
    new FileSystemXmlApplicationContext("E:\\xstudy\\spring\\spring.xml");

[3] AnnotationConfigApplicationContext

基于注解的无配置文件加载容器：AnnotationConfigApplicationContext

ApplicationContext applicationContext = 
    new AnnotationConfigApplicationContext("com.cn.student");

[4] Embeddedwebapplicationcontext

Spring Boot加载容器：Embeddedwebapplicationcontext

ApplicationContext applicationContext = new EmbeddedWebApplicationContext();