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# 你好 AWS Key Management Service
<a name="example_kms_Hello_section"></a>

以下代码示例展示了如何开始使用 AWS Key Management Service。

------
#### [ Java ]

**适用于 Java 的 SDK 2.x**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/kms#code-examples)中查找完整示例，了解如何进行设置和运行。

```
import software.amazon.awssdk.services.kms.KmsAsyncClient;
import software.amazon.awssdk.services.kms.model.ListKeysRequest;
import software.amazon.awssdk.services.kms.paginators.ListKeysPublisher;
import java.util.concurrent.CompletableFuture;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class HelloKMS {
    public static void main(String[] args) {
        listAllKeys();
    }

    public static void listAllKeys() {
        KmsAsyncClient kmsAsyncClient = KmsAsyncClient.builder()
            .build();
        ListKeysRequest listKeysRequest = ListKeysRequest.builder()
            .limit(15)
            .build();

        /*
         * The `subscribe` method is required when using paginator methods in the AWS SDK
         * because paginator methods return an instance of a `ListKeysPublisher`, which is
         * based on a reactive stream. This allows asynchronous retrieval of paginated
         * results as they become available. By subscribing to the stream, we can process
         * each page of results as they are emitted.
         */
        ListKeysPublisher keysPublisher = kmsAsyncClient.listKeysPaginator(listKeysRequest);
        CompletableFuture<Void> future = keysPublisher
            .subscribe(r -> r.keys().forEach(key ->
                System.out.println("The key ARN is: " + key.keyArn() + ". The key Id is: " + key.keyId())))
            .whenComplete((result, exception) -> {
                if (exception != null) {
                    System.err.println("Error occurred: " + exception.getMessage());
                } else {
                    System.out.println("Successfully listed all keys.");
                }
            });

        try {
            future.join();
        } catch (Exception e) {
            System.err.println("Failed to list keys: " + e.getMessage());
        }
    }
}
```
+  有关 API 的详细信息，请参阅 *AWS SDK for Java 2.x API 参考[ListKeys](https://docs.aws.amazon.com/goto/SdkForJavaV2/kms-2014-11-01/ListKeys)*中的。

------
#### [ PHP ]

**适用于 PHP 的 SDK**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/php/example_code/kms#code-examples)中查找完整示例，了解如何进行设置和运行。

```
include "vendor/autoload.php";

use Aws\Kms\KmsClient;

echo "This file shows how to connect to the KmsClient, uses a paginator to get the keys for the account, and lists the KeyIds for up to 10 keys.\n";

$client = new KmsClient([]);

$pageLength = 10; // Change this value to change the number of records shown, or to break up the result into pages.

$keys = [];
$keysPaginator = $client->getPaginator("ListKeys", ['Limit' => $pageLength]);
foreach($keysPaginator as $page){
    foreach($page['Keys'] as $index => $key){
        echo "The $index index Key's ID is: {$key['KeyId']}\n";
    }
    echo "End of page one of results. Alter the \$pageLength variable to see more results.\n";
    break;
}
```
+  有关 API 的详细信息，请参阅 *适用于 PHP 的 AWS SDK API 参考[ListKeys](https://docs.aws.amazon.com/goto/SdkForPHPV3/kms-2014-11-01/ListKeys)*中的。

------
#### [ SAP ABAP ]

**适用于 SAP ABAP 的 SDK**  
 还有更多相关信息 GitHub。在 [AWS 代码示例存储库](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/kms#code-examples)中查找完整示例，了解如何进行设置和运行。

```
    TRY.
        oo_result = lo_kms->listkeys( ).
        MESSAGE 'Retrieved KMS keys list.' TYPE 'I'.
      CATCH /aws1/cx_kmskmsinternalex.
        MESSAGE 'An internal error occurred.' TYPE 'E'.
    ENDTRY.
```
+  有关 API 的详细信息，请参阅适用[ListKeys](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)于 S *AP 的AWS SDK ABAP API 参考*。

------

有关 S AWS DK 开发者指南和代码示例的完整列表，请参阅[将此服务与 AWS SDK 配合使用](sdk-general-information-section.md)。本主题还包括有关入门的信息以及有关先前的 SDK 版本的详细信息。