如何使用Admin SDK Java将PDF文件上传到Firebase存储？

import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.storage.*;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class FirebaseStorageUploader {

    public static void main(String[] args) throws IOException {
        // 1. 加载JSON密钥文件
        FileInputStream serviceAccount = new FileInputStream("path/to/serviceAccountKey.json");
        // 2. 初始化FirebaseApp
        FirebaseOptions options = new FirebaseOptions.Builder()
                .setCredentials(GoogleCredentials.fromStream(serviceAccount))
                .build();
        FirebaseApp.initializeApp(options);
        // 3. 获取Firebase存储实例
        Storage storage = StorageOptions.getDefaultInstance().getService();
        // 4. 获取存储桶引用
        Bucket bucket = storage.get("your-bucket-name");
        // 5. 创建一个指向要上传的PDF文件的File实例
        File pdfFile = new File("path/to/pdf/file.pdf");
        // 6. 上传文件
        BlobId blobId = BlobId.of(bucket.getName(), "pdfs/" + pdfFile.getName());
        BlobInfo blobInfo = BlobInfo.newBuilder(blobId).build();
        bucket.create(blobInfo, new FileInputStream(pdfFile));
        System.out.println("PDF文件上传成功！");
    }
}