简单的 Spring，将 ClasspathApplicationContext 用于独立应用程序，如何重用？

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyApplication {

    private ApplicationContext context;

    public MyApplication() {
        context = new ClassPathXmlApplicationContext("applicationContext.xml");
    }

    public void run() {
        // 在此处编写应用程序逻辑
    }

    public static void main(String[] args) {
        MyApplication app = new MyApplication();
        app.run();
    }
}

MyService service = (MyService) context.getBean("myService");

context.refresh();

context.registerShutdownHook();

context.close();