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Java解凍文件

如果未開啟歸檔直讀,歸檔類型的Object需要解凍后才能讀取。冷歸檔、深度冷歸檔不支持開啟直讀,冷歸檔、深度冷歸檔類型的Object需要解凍后才能讀取。歸檔類型Object完成解凍通常需要數分鐘。冷歸檔類型Object完成解凍通常需要數小時。深度冷歸檔類型Object完成解凍通常需要12~48小時。解凍時間請以實際為準。本文介紹如何解凍歸檔、冷歸檔、深度冷歸檔類型的Object。

注意事項

  • 僅歸檔、冷歸檔以及深度冷歸檔類型的Object支持調用RestoreObject方法。

  • 本文以華東1(杭州)外網Endpoint為例。如果您希望通過與OSS同地域的其他阿里云產品訪問OSS,請使用內網Endpoint。關于OSS支持的RegionEndpoint的對應關系,請參見OSS訪問域名、數據中心、開放端口

  • 本文以從環境變量讀取訪問憑證為例。如何配置訪問憑證,請參見Java配置訪問憑證

  • 本文以OSS域名新建OSSClient為例。如果您希望通過自定義域名、STS等方式新建OSSClient,請參見新建OSSClient

  • 要解凍文件,您必須有oss:RestoreObject權限。具體操作,請參見RAM用戶授權自定義的權限策略。

解凍歸檔Object

以下代碼用于解凍歸檔Object:

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.*;

public class Demo {
    public static void main(String[] args) throws Exception {
        // Endpoint以華東1(杭州)為例,其它Region請按實際情況填寫。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 從環境變量中獲取訪問憑證。運行本代碼示例之前,請確保已設置環境變量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // 填寫Bucket名稱,例如examplebucket。
        String bucketName = "examplebucket";
        // 填寫不包含Bucket名稱在內的歸檔類型Object的完整路徑。
        String objectName = "exampledir/object";
        // 填寫Bucket所在地域。以華東1(杭州)為例,Region填寫為cn-hangzhou。
        String region = "cn-hangzhou";

        // 創建OSSClient實例。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {
            ObjectMetadata objectMetadata = ossClient.getObjectMetadata(bucketName, objectName);

            // 校驗Object是否為歸檔類型Object。
            StorageClass storageClass = objectMetadata.getObjectStorageClass();
            if (storageClass == StorageClass.Archive) {
                // 解凍Object。
                ossClient.restoreObject(bucketName, objectName);

                // 等待解凍完成。
                do {
                    Thread.sleep(1000);
                    objectMetadata = ossClient.getObjectMetadata(bucketName, objectName);
                } while (!objectMetadata.isRestoreCompleted());
            }

            // 獲取解凍Object。
            OSSObject ossObject = ossClient.getObject(bucketName, objectName);
            ossObject.getObjectContent().close();
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}           

解凍冷歸檔Object

以下代碼用于解凍冷歸檔Object:

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.*;

public class Demo {
    public static void main(String[] args) throws Exception {
        // Endpoint以華東1(杭州)為例,其它Region請按實際情況填寫。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 從環境變量中獲取訪問憑證。運行本代碼示例之前,請確保已設置環境變量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // 填寫Bucket名稱,例如examplebucket。
        String bucketName = "examplebucket";
        // 填寫不包含Bucket名稱在內的冷歸檔類型Object的完整路徑。
        String objectName = "exampledir/object";
        // 填寫Bucket所在地域。以華東1(杭州)為例,Region填寫為cn-hangzhou。
        String region = "cn-hangzhou";

        // 創建OSSClient實例。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {            
            // 設置解凍冷歸檔Object的優先級。
            // RestoreTier.RESTORE_TIER_EXPEDITED 表示1小時內完成解凍。
            // RestoreTier.RESTORE_TIER_STANDARD 表示2~5小時內完成解凍。
            // RestoreTier.RESTORE_TIER_BULK 表示5~12小時內完成解凍。
            RestoreJobParameters jobParameters = new RestoreJobParameters(RestoreTier.RESTORE_TIER_BULK);

            // 配置解凍參數,以設置5小時內解凍完成,解凍狀態保持2天為例。
            // 第一個參數表示保持解凍狀態的天數,默認是1天,此參數適用于解凍Archive(歸檔)與ColdArchive(冷歸檔)類型Object。
            // 第二個參數jobParameters表示解凍優先級,只適用于解凍ColdArchive類型Object。
            RestoreConfiguration configuration = new RestoreConfiguration(2, jobParameters);

            // 發起解凍請求。
            ossClient.restoreObject(bucketName, objectName, configuration);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

解凍深度冷歸檔Object

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.*;

public class Demo {
    public static void main(String[] args) throws Exception {
        // Endpoint以華東1(杭州)為例,其它Region請按實際情況填寫。
        String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
        // 從環境變量中獲取訪問憑證。運行本代碼示例之前,請確保已設置環境變量OSS_ACCESS_KEY_ID和OSS_ACCESS_KEY_SECRET。
        EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
        // 填寫Bucket名稱,例如examplebucket。
        String bucketName = "examplebucket";
        // 填寫不包含Bucket名稱在內的深度冷歸檔類型Object的完整路徑。
        String objectName = "exampledir/object";
        // 填寫Bucket所在地域。以華東1(杭州)為例,Region填寫為cn-hangzhou。
        String region = "cn-hangzhou";

        // 創建OSSClient實例。
        ClientBuilderConfiguration clientBuilderConfiguration = new ClientBuilderConfiguration();
        clientBuilderConfiguration.setSignatureVersion(SignVersion.V4);        
        OSS ossClient = OSSClientBuilder.create()
        .endpoint(endpoint)
        .credentialsProvider(credentialsProvider)
        .clientConfiguration(clientBuilderConfiguration)
        .region(region)               
        .build();

        try {          
            // 配置解凍優先級。本代碼示例以RESTORE_TIER_STANDARD為例。
            // RestoreTier.RESTORE_TIER_EXPEDITED: 12個小時之內解凍完成。            
            // RestoreTier.RESTORE_TIER_STANDARD: 48小時之內解凍完成。
            RestoreJobParameters jobParameters = new RestoreJobParameters(RestoreTier.RESTORE_TIER_STANDARD);

            // 配置解凍狀態持續時間,默認為1天。本代碼示例以解凍狀態持續時間為2天為例。
            RestoreConfiguration configuration = new RestoreConfiguration(2, jobParameters);

            // 發起解凍請求。
            ossClient.restoreObject(bucketName, objectName, configuration);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}

相關文檔

  • 關于解凍Object的完整示例代碼,請參見GitHub示例

  • 關于解凍ObjectAPI接口說明,請參見RestoreObject。