如何在java中使用来自另一个包的OSGI引用

package com.example.osgi;

import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleException;
import org.osgi.framework.ServiceReference;
import org.osgi.util.tracker.ServiceTracker;

public class OSGIReferenceExample {
    private BundleContext bundleContext;
    private ServiceTracker serviceTracker;

    public OSGIReferenceExample(BundleContext bundleContext) {
        this.bundleContext = bundleContext;
    }

    public void start() throws BundleException {
        serviceTracker = new ServiceTracker(bundleContext, MyService.class.getName(), null);
        serviceTracker.open();
        MyService myService = (MyService) serviceTracker.getService();
        if (myService != null) {
            // 使用引用的OSGI服务
            myService.doSomething();
        } else {
            // 未找到对应的OSGI服务
        }
    }

    public void stop() {
        serviceTracker.close();
    }
}

import com.example.osgi.OSGIReferenceExample;

public class MainClass {
    public static void main(String[] args) {
        OSGIReferenceExample example = new OSGIReferenceExample(bundleContext);
        try {
            example.start();
        } catch (BundleException e) {
            e.printStackTrace();
        }
    }
}