Spring boot ApplicationContext

对象直接标注annotation： @Configuration, @Component 

ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class, AppConfig1.class);

@ComponentScan({"controller","service","repository","pojo"})

@EnableJpaRepositories("repository")

@EntityScan("pojo")

@EnableAutoConfiguration

@Configuration

public class Config {

}

application.properties

spring.main.allow-bean-definition-overriding=true

public class MyWebApplicationInitializer implements WebApplicationInitializer {public void onStartup(ServletContext container) throws ServletException {AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();context.register(AppConfig.class);context.setServletContext(container);}
}

public class MyXmlWebApplicationInitializer implements WebApplicationInitializer {public void onStartup(ServletContext container) throws ServletException {XmlWebApplicationContext context = new XmlWebApplicationContext();context.setConfigLocation("/WEB-INF/spring/applicationContext.xml");context.setServletContext(container);}
}

String path = "C:/demoProject/src/main/resources/applicationcontext/student-bean-config.xml";ApplicationContext context = new FileSystemXmlApplicationContext(path);
StudentService stuSvc= context.getBean("studentService", StudentService.class);

ApplicationContext context = new ClassPathXmlApplicationContext("applicationcontext/student-bean-config.xml");
StudentService studentService = context.getBean("studentService", StudentService.class);

@Import(Config.class)
@SpringBootApplication
public static void main(String[] args) {ApplicationContext context = SpringApplication.run(DemoApplication.class, args);Student student = context.getBean(Student.class);
}