Java SDK を使用して Qiniu Cloud に接続する: クラウド ストレージ サービスを実装するにはどうすればよいですか?

<dependencies>
    <dependency>
        <groupId>com.qiniu</groupId>
        <artifactId>qiniu-java-sdk</artifactId>
        <version>7.2.3</version>
    </dependency>
</dependencies>

import com.qiniu.util.Auth;
import com.qiniu.storage.UploadManager;

public class QiniuService {
    private static final String ACCESS_KEY = "your access key";
    private static final String SECRET_KEY = "your secret key";
    private static final String BUCKET_NAME = "your bucket name";

    private static final Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);

    private static final UploadManager uploadManager = new UploadManager();
}

import com.qiniu.http.Response;
import com.qiniu.storage.Configuration;
import com.qiniu.storage.UploadManager;
import com.qiniu.util.Auth;

import java.io.File;

public class QiniuService {
    // ... 省略其他代码 ...

    public String uploadFile(File file, String fileName) {
        String token = auth.uploadToken(BUCKET_NAME);
        try {
            Response response = uploadManager.put(file, fileName, token);
            if (response.isOK()) {
                return fileName;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

import com.qiniu.storage.BucketManager;

public class QiniuService {
    // ... 省略其他代码 ...

    public boolean downloadFile(String key, String savePath) {
        try {
            File file = new File(savePath);
            BucketManager.DownloadUrl(downloadUrl).download(file);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }
}

import com.qiniu.storage.BucketManager;

public class QiniuService {
    // ... 省略其他代码 ...

    public boolean deleteFile(String key) {
        try {
            BucketManager.delete(BUCKET_NAME, key);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }
}