用java代码上传文件到github

要使用Java代码上传文件到GitHub，可以使用GitHub API。以下是一个示例代码：

import org.apache.commons.codec.binary.Base64;
import org.apache.http.HttpHeaders;
import org.apache.http.HttpStatus;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class GitHubUploader {
    private static final String API_URL = "https://api.github.com/repos/{owner}/{repo}/contents/{path}";

    private final String owner;
    private final String repo;
    private final String token;

    public GitHubUploader(String owner, String repo, String token) {
        this.owner = owner;
        this.repo = repo;
        this.token = token;
    }

    public void uploadFile(String path, File file) throws IOException {
        String content = Base64.encodeBase64String(readFile(file));

        String apiUrl = API_URL
                .replace("{owner}", owner)
                .replace("{repo}", repo)
                .replace("{path}", path);

        CloseableHttpClient client = HttpClients.createDefault();
        HttpPut request = new HttpPut(apiUrl);

        addHeaders(request);
        addRequestBody(request, content);

        CloseableHttpResponse response = client.execute(request);

        if (response.getStatusLine().getStatusCode() == HttpStatus.SC_CREATED) {
            System.out.println("File uploaded successfully");
        } else {
            System.err.println("Failed to upload file: " + response.getStatusLine());
        }

        EntityUtils.consume(response.getEntity());
        response.close();
        client.close();
    }

    private void addHeaders(HttpRequestBase request) {
        request.setHeader(HttpHeaders.ACCEPT, "application/vnd.github+json");
        request.setHeader(HttpHeaders.AUTHORIZATION, "token " + token);
        request.setHeader(HttpHeaders.CONTENT_TYPE, ContentType.APPLICATION_JSON.getMimeType());
    }

    private void addRequestBody(HttpPut request, String content) {
        String body = String.format("{\"message\":\"Upload %s\",\"content\":\"%s\"}", request.getURI().getPath(), content);
        request.setEntity(new StringEntity(body, ContentType.APPLICATION_JSON));
    }

    private byte[] readFile(File file) throws IOException {
        try (FileInputStream inputStream = new FileInputStream(file)) {
            byte[] buffer = new byte[(int) file.length()];
            inputStream.read(buffer);
            return buffer;
        }
    }
}

在使用时，你需要替换以下三个参数：

- `owner`：你的GitHub用户名或组织名；
- `repo`：你要上传文件的仓库名称；
- `token`：一个GitHub Personal Access Token，用于进行API授权。

然后可以调用 `uploadFile` 方法上传文件。例如：

GitHubUploader uploader = new GitHubUploader("username", "repo-name", "personal-access-token");
File file = new File("/path/to/file.txt");
uploader.uploadFile("path/to/file.txt", file);

这将会在 `repo-name` 仓库的 `path/to/file.txt` 路径下上传 `file.txt` 文件。