使用 SDK for Java 2.x 的 Forecast 示例 - Amazon SDK for Java 2.x

使用 SDK for Java 2.x 的 Forecast 示例

以下代码示例向您展示了如何使用 with Forecast 来执行操作和实现常见场景。 Amazon SDK for Java 2.x

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

操作

以下代码示例演示了如何使用 CreateDataset。

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.forecast.ForecastClient;
import software.amazon.awssdk.services.forecast.model.CreateDatasetRequest;
import software.amazon.awssdk.services.forecast.model.Schema;
import software.amazon.awssdk.services.forecast.model.SchemaAttribute;
import software.amazon.awssdk.services.forecast.model.CreateDatasetResponse;
import software.amazon.awssdk.services.forecast.model.ForecastException;
import java.util.ArrayList;
import java.util.List;

/**
 * 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 CreateDataSet {
    public static void main(String[] args) {
        final String usage = """

                Usage:
                    <name>\s

                Where:
                    name - The name of the data set.\s
                """;

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

        String name = args[0];
        Region region = Region.US_WEST_2;
        ForecastClient forecast = ForecastClient.builder()
                .region(region)
                .build();

        String myDataSetARN = createForecastDataSet(forecast, name);
        System.out.println("The ARN of the new data set is " + myDataSetARN);
        forecast.close();
    }

    public static String createForecastDataSet(ForecastClient forecast, String name) {
        try {
            Schema schema = Schema.builder()
                    .attributes(getSchema())
                    .build();

            CreateDatasetRequest datasetRequest = CreateDatasetRequest.builder()
                    .datasetName(name)
                    .domain("CUSTOM")
                    .datasetType("RELATED_TIME_SERIES")
                    .dataFrequency("D")
                    .schema(schema)
                    .build();

            CreateDatasetResponse response = forecast.createDataset(datasetRequest);
            return response.datasetArn();

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

        return "";
    }

    // Create a SchemaAttribute list required to create a data set.
    private static List<SchemaAttribute> getSchema() {

        List<SchemaAttribute> schemaList = new ArrayList<>();
        SchemaAttribute att1 = SchemaAttribute.builder()
                .attributeName("item_id")
                .attributeType("string")
                .build();

        SchemaAttribute att2 = SchemaAttribute.builder()
                .attributeName("timestamp")
                .attributeType("timestamp")
                .build();

        SchemaAttribute att3 = SchemaAttribute.builder()
                .attributeName("target_value")
                .attributeType("float")
                .build();

        // Push the SchemaAttribute objects to the List.
        schemaList.add(att1);
        schemaList.add(att2);
        schemaList.add(att3);
        return schemaList;
    }
}

有关 API 的详细信息，请参阅 Amazon SDK for Java 2.x API 参考CreateDataset中的。

以下代码示例演示了如何使用 CreateForecast。

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.forecast.ForecastClient;
import software.amazon.awssdk.services.forecast.model.CreateForecastRequest;
import software.amazon.awssdk.services.forecast.model.CreateForecastResponse;
import software.amazon.awssdk.services.forecast.model.ForecastException;

/**
 * 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 CreateForecast {
    public static void main(String[] args) {
        final String usage = """

                Usage:
                    <name> <predictorArn>\s

                Where:
                    name - The name of the forecast.\s
                    predictorArn - The arn of the predictor to use.\s

                """;

        if (args.length != 2) {
            System.out.println(usage);
            System.exit(1);
        }

        String name = args[0];
        String predictorArn = args[1];
        Region region = Region.US_WEST_2;
        ForecastClient forecast = ForecastClient.builder()
                .region(region)
                .build();

        String forecastArn = createNewForecast(forecast, name, predictorArn);
        System.out.println("The ARN of the new forecast is " + forecastArn);
        forecast.close();
    }

    public static String createNewForecast(ForecastClient forecast, String name, String predictorArn) {
        try {
            CreateForecastRequest forecastRequest = CreateForecastRequest.builder()
                    .forecastName(name)
                    .predictorArn(predictorArn)
                    .build();

            CreateForecastResponse response = forecast.createForecast(forecastRequest);
            return response.forecastArn();

        } catch (ForecastException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }
}

有关 API 的详细信息，请参阅 Amazon SDK for Java 2.x API 参考CreateForecast中的。

以下代码示例演示了如何使用 DeleteDataset。

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.forecast.ForecastClient;
import software.amazon.awssdk.services.forecast.model.DeleteDatasetRequest;
import software.amazon.awssdk.services.forecast.model.ForecastException;

/**
 * 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 DeleteDataset {

    public static void main(String[] args) {
        final String usage = """

                Usage:
                    <datasetARN>\s

                Where:
                    datasetARN - The ARN of the data set to delete.\s
                """;

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

        String datasetARN = args[0];
        Region region = Region.US_WEST_2;
        ForecastClient forecast = ForecastClient.builder()
                .region(region)
                .build();

        deleteForecastDataSet(forecast, datasetARN);
        forecast.close();
    }

    public static void deleteForecastDataSet(ForecastClient forecast, String myDataSetARN) {
        try {
            DeleteDatasetRequest deleteRequest = DeleteDatasetRequest.builder()
                    .datasetArn(myDataSetARN)
                    .build();

            forecast.deleteDataset(deleteRequest);
            System.out.println("The Data Set was deleted");

        } catch (ForecastException 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DeleteDataset中的。

以下代码示例演示了如何使用 DeleteForecast。

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.forecast.ForecastClient;
import software.amazon.awssdk.services.forecast.model.DeleteDatasetRequest;
import software.amazon.awssdk.services.forecast.model.ForecastException;

/**
 * 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 DeleteDataset {

    public static void main(String[] args) {
        final String usage = """

                Usage:
                    <datasetARN>\s

                Where:
                    datasetARN - The ARN of the data set to delete.\s
                """;

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

        String datasetARN = args[0];
        Region region = Region.US_WEST_2;
        ForecastClient forecast = ForecastClient.builder()
                .region(region)
                .build();

        deleteForecastDataSet(forecast, datasetARN);
        forecast.close();
    }

    public static void deleteForecastDataSet(ForecastClient forecast, String myDataSetARN) {
        try {
            DeleteDatasetRequest deleteRequest = DeleteDatasetRequest.builder()
                    .datasetArn(myDataSetARN)
                    .build();

            forecast.deleteDataset(deleteRequest);
            System.out.println("The Data Set was deleted");

        } catch (ForecastException 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DeleteForecast中的。

以下代码示例演示了如何使用 DescribeForecast。

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.forecast.ForecastClient;
import software.amazon.awssdk.services.forecast.model.DescribeForecastRequest;
import software.amazon.awssdk.services.forecast.model.DescribeForecastResponse;
import software.amazon.awssdk.services.forecast.model.ForecastException;

/**
 * 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 DescribeForecast {
    public static void main(String[] args) {
        final String usage = """

                Usage:
                    <forecastarn>\s

                Where:
                    forecastarn - The arn of the forecast (for example, "arn:aws:forecast:us-west-2:xxxxx322:forecast/my_forecast)
                """;

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

        String forecastarn = args[0];
        Region region = Region.US_WEST_2;
        ForecastClient forecast = ForecastClient.builder()
                .region(region)
                .build();

        describe(forecast, forecastarn);
        forecast.close();
    }

    public static void describe(ForecastClient forecast, String forecastarn) {
        try {
            DescribeForecastRequest request = DescribeForecastRequest.builder()
                    .forecastArn(forecastarn)
                    .build();

            DescribeForecastResponse response = forecast.describeForecast(request);
            System.out.println("The name of the forecast is " + response.forecastName());

        } catch (ForecastException 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DescribeForecast中的。

以下代码示例演示了如何使用 ListDatasetGroups。

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.forecast.ForecastClient;
import software.amazon.awssdk.services.forecast.model.DatasetGroupSummary;
import software.amazon.awssdk.services.forecast.model.ListDatasetGroupsRequest;
import software.amazon.awssdk.services.forecast.model.ListDatasetGroupsResponse;
import software.amazon.awssdk.services.forecast.model.ForecastException;
import java.util.List;

/**
 * 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 ListDataSetGroups {
    public static void main(String[] args) {
        Region region = Region.US_WEST_2;
        ForecastClient forecast = ForecastClient.builder()
                .region(region)
                .build();

        listDataGroups(forecast);
        forecast.close();
    }

    public static void listDataGroups(ForecastClient forecast) {
        try {
            ListDatasetGroupsRequest group = ListDatasetGroupsRequest.builder()
                    .maxResults(10)
                    .build();

            ListDatasetGroupsResponse response = forecast.listDatasetGroups(group);
            List<DatasetGroupSummary> groups = response.datasetGroups();
            for (DatasetGroupSummary myGroup : groups) {
                System.out.println("The Data Set name is " + myGroup.datasetGroupName());
            }

        } catch (ForecastException 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ListDatasetGroups中的。

以下代码示例演示了如何使用 ListForecasts。

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.forecast.ForecastClient;
import software.amazon.awssdk.services.forecast.model.ListForecastsResponse;
import software.amazon.awssdk.services.forecast.model.ListForecastsRequest;
import software.amazon.awssdk.services.forecast.model.ForecastSummary;
import software.amazon.awssdk.services.forecast.model.ForecastException;
import java.util.List;

/**
 * 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 ListForecasts {

    public static void main(String[] args) {
        Region region = Region.US_WEST_2;
        ForecastClient forecast = ForecastClient.builder()
                .region(region)
                .build();

        listAllForeCasts(forecast);
        forecast.close();
    }

    public static void listAllForeCasts(ForecastClient forecast) {
        try {
            ListForecastsRequest request = ListForecastsRequest.builder()
                    .maxResults(10)
                    .build();

            ListForecastsResponse response = forecast.listForecasts(request);
            List<ForecastSummary> forecasts = response.forecasts();
            for (ForecastSummary forecastSummary : forecasts) {
                System.out.println("The name of the forecast is " + forecastSummary.forecastName());
            }

        } catch (ForecastException 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ListForecasts中的。

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