A practical guide to quickly get started with Java and Huawei Cloud OBS Object Storage Service

Practical Guide to Quickly Get Started with Java and Huawei Cloud OBS Object Storage Service

Introduction:
With the rapid development of cloud computing, more and more enterprises and individuals are beginning to store data in the cloud. , to improve data reliability and availability. Huawei Cloud's OBS object storage service is a powerful cloud storage solution. This article will introduce how to use the Java programming language to quickly get started with Huawei Cloud's OBS object storage service, and provide corresponding code examples for readers' reference.

1. Preparation

1. Register a Huawei Cloud account and complete real-name authentication
2. Create an OBS bucket and obtain the bucket’s access domain name, access key ID and Access key secret.

2. Add dependencies
To use Huawei Cloud's OBS object storage service in a Java project, you first need to add the corresponding dependencies.

<dependency>
    <groupId>com.obs</groupId>
    <artifactId>obs-java-sdk</artifactId>
    <version>3.20.6</version>
</dependency>

3. Initialize OBS client
Through the Java SDK provided by Huawei Cloud, we can use Huawei Cloud's OBS object storage service. First, you need to initialize the OBS client and provide the appropriate access domain name, access key ID, and access key secret.

import com.obs.services.ObsClient;

public class OBSExample {
    public static void main(String[] args) {
        String endPoint = "https://your-endpoint";
        String ak = "your-access-key-id";
        String sk = "your-secret-access-key";

        ObsClient obsClient = new ObsClient(ak, sk, endPoint);
        
        // 根据客户端需求进行相关操作
    }
}

4. Create an OBS bucket
In the OBS object storage service, the most basic unit of storage is a bucket, which is similar to a folder. Using Huawei Cloud's OBS service, we can create an OBS bucket through Java code.

import com.obs.services.ObsClient;
import com.obs.services.model.CreateBucketRequest;

public class OBSExample {
    public static void main(String[] args) {
        // 初始化OBS客户端
        
        String bucketName = "your-bucket-name";
        String location = "your-bucket-location";
        
        CreateBucketRequest request = new CreateBucketRequest(bucketName, location);
        obsClient.createBucket(request);
        
        // 创建桶成功
    }
}

5. Upload files to the OBS bucket
Using Java code, we can upload local files to the OBS bucket.

import com.obs.services.ObsClient;
import com.obs.services.model.PutObjectRequest;
import com.obs.services.model.PutObjectResult;

public class OBSExample {
    public static void main(String[] args) {
        // 初始化OBS客户端
        
        String bucketName = "your-bucket-name";
        String objectKey = "your-object-key";
        String localFile = "path-to-local-file";

        PutObjectRequest request = new PutObjectRequest(bucketName, objectKey, new File(localFile));
        PutObjectResult result = obsClient.putObject(request);
        
        // 上传文件成功
    }
}

6. Download the files in the OBS bucket
Using Java code, we can download the files in the OBS bucket to the local.

import com.obs.services.ObsClient;
import com.obs.services.model.GetObjectRequest;
import com.obs.services.model.ObsObject;

public class OBSExample {
    public static void main(String[] args) {
        // 初始化OBS客户端
        
        String bucketName = "your-bucket-name";
        String objectKey = "your-object-key";
        String localFile = "path-to-download-file";

        GetObjectRequest request = new GetObjectRequest(bucketName, objectKey);
        ObsObject obsObject = obsClient.getObject(request);
        InputStream inputStream = obsObject.getObjectContent();

        // 将文件保存到本地
        File file = new File(localFile);
        FileOutputStream outputStream = new FileOutputStream(file);
        byte[] buffer = new byte[1024];
        int len;
        while ((len = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, len);
        }
        
        inputStream.close();
        outputStream.close();
        
        // 下载文件成功
    }
}

7. Delete files in the OBS bucket
Using Java code, we can delete files in the OBS bucket.

import com.obs.services.ObsClient;
import com.obs.services.model.DeleteObjectRequest;
import com.obs.services.model.DeleteObjectResult;

public class OBSExample {
    public static void main(String[] args) {
        // 初始化OBS客户端
        
        String bucketName = "your-bucket-name";
        String objectKey = "your-object-key";

        DeleteObjectRequest request = new DeleteObjectRequest(bucketName, objectKey);
        DeleteObjectResult result = obsClient.deleteObject(request);
        
        // 删除文件成功
    }
}

Conclusion:
This article introduces how to use Java and Huawei Cloud's OBS object storage service to get started quickly, including the required preparations, adding dependencies, initializing the OBS client, and creating the OBS bucket. File upload, download and deletion. I hope this article can help readers quickly get started with Java and Huawei Cloud's OBS object storage service, and provide guidance and reference for actual project development.

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