使用 SDK for Java 2.x 的 Amazon Cognito Identity 示例 - Amazon SDK for Java 2.x
操作
Amazon Web Services 文档中描述的 Amazon Web Services 服务或功能可能因区域而异。要查看适用于中国区域的差异，请参阅 中国的 Amazon Web Services 服务入门 (PDF)。

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 Amazon 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和跨服务示例的上下文查看操作。

场景 是展示如何通过在同一服务中调用多个函数来完成特定任务的代码示例。

每个示例都包含一个指向的链接 GitHub，您可以在其中找到有关如何在上下文中设置和运行代码的说明。

主题

操作

以下代码示例演示了如何创建 Amazon Cognito 身份池。

适用于 Java 2.x 的 SDK
注意

还有更多相关信息 GitHub。在 Amazon 代码示例存储库中查找完整示例，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:
                    <identityPoolName>\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 "";
    }
}

以下代码示例演示了如何删除 Amazon Cognito 身份池。

适用于 Java 2.x 的 SDK
注意

还有更多相关信息 GitHub。在 Amazon 代码示例存储库中查找完整示例，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:
                    <identityPoolId>\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 Amazon SDK for Java 2.x API 参考DeleteIdentityPool中的。

以下代码示例演示了如何获取 Amazon Cognito 身份的凭证。

适用于 Java 2.x 的 SDK
注意

还有更多相关信息 GitHub。在 Amazon 代码示例存储库中查找完整示例，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:
                    <identityId>\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);
        }
    }
}

以下代码示例演示了如何获取 Amazon Cognito 身份池的列表。

适用于 Java 2.x 的 SDK
注意

还有更多相关信息 GitHub。在 Amazon 代码示例存储库中查找完整示例，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);
        }
    }
}