如何在jGit中获取自提交以来所有更改过的文件？

import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.eclipse.jgit.treewalk.filter.PathFilter;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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

            Iterable<RevCommit> commits = git.log().call();
            RevCommit latestCommit = commits.iterator().next();

            ObjectId latestCommitId = latestCommit.getId();
            ObjectId oldCommitId = latestCommit.getParent(0).getId();

            List<String> changedFiles = getChangedFiles(repository, oldCommitId, latestCommitId);
            for (String file : changedFiles) {
                System.out.println(file);
            }
        } catch (IOException | GitAPIException e) {
            e.printStackTrace();
        }
    }

    private static List<String> getChangedFiles(Repository repository, ObjectId oldCommitId, ObjectId latestCommitId) throws IOException {
        List<String> changedFiles = new ArrayList<>();

        try (TreeWalk treeWalk = new TreeWalk(repository)) {
            treeWalk.addTree(repository.parseCommit(latestCommitId).getTree());
            if (oldCommitId != null) {
                treeWalk.addTree(repository.parseCommit(oldCommitId).getTree());
            }

            treeWalk.setRecursive(true);
            treeWalk.setFilter(PathFilter.ALL);

            while (treeWalk.next()) {
                if (treeWalk.getRawMode(0) == FileMode.REGULAR_FILE.getBits()) {
                    changedFiles.add(treeWalk.getPathString());
                }
            }
        }

        return changedFiles;
    }
}