在Java中高效地获取git blob大小

<dependencies>
  <dependency>
    <groupId>org.eclipse.jgit</groupId>
    <artifactId>org.eclipse.jgit</artifactId>
    <version>5.12.0.201906241030-r</version>
  </dependency>
</dependencies>

import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectLoader;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.storage.file.FileRepositoryBuilder;

import java.io.IOException;

public class GitBlobSize {
  public static long getBlobSize(String repositoryPath, String blobId) throws IOException, GitAPIException {
    Repository repository = new FileRepositoryBuilder()
        .setGitDir(new File(repositoryPath))
        .build();

    Git git = new Git(repository);
    ObjectId objectId = ObjectId.fromString(blobId);
    ObjectLoader loader = repository.open(objectId);
    long blobSize = loader.getSize();

    git.close();
    repository.close();

    return blobSize;
  }

  public static void main(String[] args) {
    try {
      String repositoryPath = "path_to_repository";
      String blobId = "blob_id";
      long blobSize = getBlobSize(repositoryPath, blobId);
      System.out.println("Blob size: " + blobSize + " bytes");
    } catch (IOException | GitAPIException e) {
      e.printStackTrace();
    }
  }
}