文档 AWS SDK 示例 GitHub 存储库中还有更多 [S AWS DK 示例](https://github.com/awsdocs/aws-doc-sdk-examples)。 本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。 # 使用 SDK for Java 2.x 的 Amazon Cognito Identity 示例 以下代码示例向您展示了如何使用 AWS SDK for Java 2.x 与 Amazon Cognito Identity 配合使用来执行操作和实现常见场景。 *操作*是大型程序的代码摘录，必须在上下文中运行。您可以通过操作了解如何调用单个服务函数，还可以通过函数相关场景的上下文查看操作。 每个示例都包含一个指向完整源代码的链接，您可以从中找到有关如何在上下文中设置和运行代码的说明。 **Topics** + [操作](#actions) ## 操作 ### `CreateIdentityPool` 以下代码示例演示了如何使用 `CreateIdentityPool`。 **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/cognito#code-examples)中查找完整示例，了解如何进行设置和运行。 ``` import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.cognitoidentity.CognitoIdentityClient; import software.amazon.awssdk.services.cognitoidentity.model.CreateIdentityPoolRequest; import software.amazon.awssdk.services.cognitoidentity.model.CreateIdentityPoolResponse; import software.amazon.awssdk.services.cognitoidentityprovider.model.CognitoIdentityProviderException; /** * 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 CreateIdentityPool { public static void main(String[] args) { final String usage = """ Usage: \s Where: identityPoolName - The name to give your identity pool. """; if (args.length != 1) { System.out.println(usage); System.exit(1); } String identityPoolName = args[0]; CognitoIdentityClient cognitoClient = CognitoIdentityClient.builder() .region(Region.US_EAST_1) .build(); String identityPoolId = createIdPool(cognitoClient, identityPoolName); System.out.println("Unity pool ID " + identityPoolId); cognitoClient.close(); } public static String createIdPool(CognitoIdentityClient cognitoClient, String identityPoolName) { try { CreateIdentityPoolRequest poolRequest = CreateIdentityPoolRequest.builder() .allowUnauthenticatedIdentities(false) .identityPoolName(identityPoolName) .build(); CreateIdentityPoolResponse response = cognitoClient.createIdentityPool(poolRequest); return response.identityPoolId(); } catch (CognitoIdentityProviderException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; } } ``` + 有关 API 的详细信息，请参阅 *AWS SDK for Java 2.x API 参考[CreateIdentityPool](https://docs.aws.amazon.com/goto/SdkForJavaV2/cognito-identity-2014-06-30/CreateIdentityPool)*中的。 ### `DeleteIdentityPool` 以下代码示例演示了如何使用 `DeleteIdentityPool`。 **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/cognito#code-examples)中查找完整示例，了解如何进行设置和运行。 ``` import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider; import software.amazon.awssdk.awscore.exception.AwsServiceException; import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.cognitoidentity.CognitoIdentityClient; import software.amazon.awssdk.services.cognitoidentity.model.DeleteIdentityPoolRequest; /** * 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 DeleteIdentityPool { public static void main(String[] args) { final String usage = """ Usage: \s Where: identityPoolId - The Id value of your identity pool. """; if (args.length != 1) { System.out.println(usage); System.exit(1); } String identityPoold = args[0]; CognitoIdentityClient cognitoIdClient = CognitoIdentityClient.builder() .region(Region.US_EAST_1) .credentialsProvider(ProfileCredentialsProvider.create()) .build(); deleteIdPool(cognitoIdClient, identityPoold); cognitoIdClient.close(); } public static void deleteIdPool(CognitoIdentityClient cognitoIdClient, String identityPoold) { try { DeleteIdentityPoolRequest identityPoolRequest = DeleteIdentityPoolRequest.builder() .identityPoolId(identityPoold) .build(); cognitoIdClient.deleteIdentityPool(identityPoolRequest); System.out.println("Done"); } catch (AwsServiceException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } } ``` + 有关 API 的详细信息，请参阅 *AWS SDK for Java 2.x API 参考[DeleteIdentityPool](https://docs.aws.amazon.com/goto/SdkForJavaV2/cognito-identity-2014-06-30/DeleteIdentityPool)*中的。 ### `GetCredentialsForIdentity` 以下代码示例演示了如何使用 `GetCredentialsForIdentity`。 **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/cognito#code-examples)中查找完整示例，了解如何进行设置和运行。 ``` import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.cognitoidentity.CognitoIdentityClient; import software.amazon.awssdk.services.cognitoidentity.model.GetCredentialsForIdentityRequest; import software.amazon.awssdk.services.cognitoidentity.model.GetCredentialsForIdentityResponse; import software.amazon.awssdk.services.cognitoidentityprovider.model.CognitoIdentityProviderException; /** * 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 GetIdentityCredentials { public static void main(String[] args) { final String usage = """ Usage: \s Where: identityId - The Id of an existing identity in the format REGION:GUID. """; if (args.length != 1) { System.out.println(usage); System.exit(1); } String identityId = args[0]; CognitoIdentityClient cognitoClient = CognitoIdentityClient.builder() .region(Region.US_EAST_1) .build(); getCredsForIdentity(cognitoClient, identityId); cognitoClient.close(); } public static void getCredsForIdentity(CognitoIdentityClient cognitoClient, String identityId) { try { GetCredentialsForIdentityRequest getCredentialsForIdentityRequest = GetCredentialsForIdentityRequest .builder() .identityId(identityId) .build(); GetCredentialsForIdentityResponse response = cognitoClient .getCredentialsForIdentity(getCredentialsForIdentityRequest); System.out.println( "Identity ID " + response.identityId() + ", Access key ID " + response.credentials().accessKeyId()); } catch (CognitoIdentityProviderException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } } ``` + 有关 API 的详细信息，请参阅 *AWS SDK for Java 2.x API 参考[GetCredentialsForIdentity](https://docs.aws.amazon.com/goto/SdkForJavaV2/cognito-identity-2014-06-30/GetCredentialsForIdentity)*中的。 ### `ListIdentityPools` 以下代码示例演示了如何使用 `ListIdentityPools`。 **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/cognito#code-examples)中查找完整示例，了解如何进行设置和运行。 ``` import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.cognitoidentity.CognitoIdentityClient; import software.amazon.awssdk.services.cognitoidentity.model.ListIdentityPoolsRequest; import software.amazon.awssdk.services.cognitoidentity.model.ListIdentityPoolsResponse; import software.amazon.awssdk.services.cognitoidentityprovider.model.CognitoIdentityProviderException; /** * 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 ListIdentityPools { public static void main(String[] args) { CognitoIdentityClient cognitoClient = CognitoIdentityClient.builder() .region(Region.US_EAST_1) .build(); listIdPools(cognitoClient); cognitoClient.close(); } public static void listIdPools(CognitoIdentityClient cognitoClient) { try { ListIdentityPoolsRequest poolsRequest = ListIdentityPoolsRequest.builder() .maxResults(15) .build(); ListIdentityPoolsResponse response = cognitoClient.listIdentityPools(poolsRequest); response.identityPools().forEach(pool -> { System.out.println("Pool ID: " + pool.identityPoolId()); System.out.println("Pool name: " + pool.identityPoolName()); }); } catch (CognitoIdentityProviderException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } } ``` + 有关 API 的详细信息，请参阅 *AWS SDK for Java 2.x API 参考[ListIdentityPools](https://docs.aws.amazon.com/goto/SdkForJavaV2/cognito-identity-2014-06-30/ListIdentityPools)*中的。