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# 使用 Java AWS SDK 获取 Secrets Manager 密钥值
<a name="retrieving-secrets-java-sdk"></a>

在应用程序中，您可以通过调用`GetSecretValue`或`BatchGetSecretValue`在任一应用程序中检索您的秘密 AWS SDKs。不过，我们建议您通过使用客户端缓存来缓存您的密钥值。缓存密钥可以提高速度并降低成本。
+ 如果您将数据库凭证存储在密钥中，请使用 [Secrets Manager SQL 连接驱动程序](retrieving-secrets_jdbc.md)借助密钥中的凭证连接到数据库。
+ 对于其他类型的密钥，使用 [Secrets Manager 基于 Java 的缓存组件](retrieving-secrets_cache-java.md)，或直接使用 [https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/secretsmanager/model/GetSecretValueResult.html](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/secretsmanager/model/GetSecretValueResult.html) 或 [https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/secretsmanager/model/BatchGetSecretValueResult.html](https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/secretsmanager/model/BatchGetSecretValueResult.html) 调用 SDK。

以下代码示例演示如何使用 `GetSecretValue`。

**所需权限：**`secretsmanager:GetSecretValue`

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.secretsmanager.SecretsManagerClient;
import software.amazon.awssdk.services.secretsmanager.model.GetSecretValueRequest;
import software.amazon.awssdk.services.secretsmanager.model.GetSecretValueResponse;
import software.amazon.awssdk.services.secretsmanager.model.SecretsManagerException;

/**
 * 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
 *
 * We recommend that you cache your secret values by using client-side caching.
 *
 * Caching secrets improves speed and reduces your costs. For more information,
 * see the following documentation topic:
 *
 * https://docs.aws.amazon.com/secretsmanager/latest/userguide/retrieving-secrets.html
 */
public class GetSecretValue {
    public static void main(String[] args) {
        final String usage = """

                Usage:
                    <secretName>\s

                Where:
                    secretName - The name of the secret (for example, tutorials/MyFirstSecret).\s
                """;

        if (args.length != 1) {
            System.out.println(usage);
            System.exit(1);
        }

        String secretName = args[0];
        Region region = Region.US_EAST_1;
        SecretsManagerClient secretsClient = SecretsManagerClient.builder()
                .region(region)
                .build();

        getValue(secretsClient, secretName);
        secretsClient.close();
    }

    public static void getValue(SecretsManagerClient secretsClient, String secretName) {
        try {
            GetSecretValueRequest valueRequest = GetSecretValueRequest.builder()
                    .secretId(secretName)
                    .build();

            GetSecretValueResponse valueResponse = secretsClient.getSecretValue(valueRequest);
            String secret = valueResponse.secretString();
            System.out.println(secret);

        } catch (SecretsManagerException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}
```