如何使用JGit进行“git show sha1”

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.revwalk.RevCommit;

import java.io.IOException;

public class JGitShowExample {
    public static void main(String[] args) {
        try (Repository repository = Git.open(new File("/path/to/repository/.git")).getRepository()) {
            Git git = new Git(repository);
            ObjectId commitId = repository.resolve("sha1");

            RevCommit commit = git.log().add(commitId).call().iterator().next();
            System.out.println("Author: " + commit.getAuthorIdent().getName());
            System.out.println("Commit Time: " + commit.getAuthorIdent().getWhen());
            System.out.println("Message: " + commit.getFullMessage());

            // 获取修改的文件列表
            ObjectLoader loader = repository.open(commit.getTree());
            loader.copyTo(System.out);
        } catch (IOException | GitAPIException e) {
            e.printStackTrace();
        }
    }
}