【Java】GCSからjsonファイルをダウンロードする

JavaでGCSにあるファイルをダウンロードする

公式ドキュメントを参考にする

cloud.google.com

import com.google.cloud.storage.Blob;
import com.google.cloud.storage.BlobId;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.nio.file.Paths;

public class DownloadObject {
  public static void downloadObject(
      String projectId, String bucketName, String objectName, String destFilePath) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    // The ID of your GCS object
    // String objectName = "your-object-name";

    // The path to which the file should be downloaded
    // String destFilePath = "/local/path/to/file.txt";

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

    Blob blob = storage.get(BlobId.of(bucketName, objectName));
    blob.downloadTo(Paths.get(destFilePath));

    System.out.println(
        "Downloaded object "
            + objectName
            + " from bucket name "
            + bucketName
            + " to "
            + destFilePath);
  }
}