如何在JAVA中从google存储云存储桶中获取所有pdf文件

import com.google.cloud.storage.Blob;
import com.google.cloud.storage.BlobId;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;

public class GCSExample {
    public static void main(String[] args) {
        // 设置Google Cloud项目ID和存储桶名称
        String projectId = "your-project-id";
        String bucketName = "your-bucket-name";

        // 创建Storage实例
        Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();

        // 获取存储桶中的所有Blob对象
        Iterable<Blob> blobs = storage.list(bucketName).iterateAll();

        // 遍历所有Blob对象，筛选出PDF文件
        for (Blob blob : blobs) {
            if (blob.getName().endsWith(".pdf")) {
                // 处理PDF文件，例如下载到本地
                BlobId blobId = BlobId.of(bucketName, blob.getName());
                Blob pdfBlob = storage.get(blobId);
                pdfBlob.downloadTo(/* local file path */);
            }
        }
    }
}