七牛雲端物件儲存：Java SDK如何實作檔案上傳與下載？

<dependency>
    <groupId>com.qiniu</groupId>
    <artifactId>qiniu-java-sdk</artifactId>
    <version>7.6.0</version>
</dependency>

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

public class FileUploader {

    // 七牛云的配置参数
    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";

    public static void main(String[] args) {
        // 创建七牛云的配置对象
        Configuration configuration = new Configuration();

        // 创建七牛云的Auth对象
        Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);
        
        // 创建七牛云的上传管理器
        UploadManager uploadManager = new UploadManager(configuration);

        // 生成上传凭证
        String uploadToken = auth.uploadToken(BUCKET_NAME);

        try {
            // 要上传的文件路径
            String filePath = "/path/to/your/file";

            // 调用上传管理器的put方法进行文件上传
            Response response = uploadManager.put(filePath, null, uploadToken);

            // 输出上传结果
            System.out.println(response.bodyString());
        } catch (QiniuException e) {
            e.printStackTrace();
        }
    }
}

import com.qiniu.common.QiniuException;
import com.qiniu.storage.Configuration;
import com.qiniu.storage.BucketManager;
import com.qiniu.util.Auth;

public class FileDownloader {

    // 七牛云的配置参数
    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";

    public static void main(String[] args) {
        // 创建七牛云的配置对象
        Configuration configuration = new Configuration();

        // 创建七牛云的Auth对象
        Auth auth = Auth.create(ACCESS_KEY, SECRET_KEY);

        // 创建七牛云的BucketManager对象
        BucketManager bucketManager = new BucketManager(auth, configuration);

        try {
            // 要下载的文件名
            String fileName = "your-file-name";

            // 调用BucketManager的download方法进行文件下载
            bucketManager.download(BUCKET_NAME, fileName, new File("/path/to/save/file"));
        } catch (QiniuException e) {
            e.printStackTrace();
        }
    }
}