文件 AWS 開發套件範例 GitHub 儲存庫中有更多可用的 [AWS SDK 範例](https://github.com/awsdocs/aws-doc-sdk-examples)。

本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# 使用 AWS SDKs程式碼範例
<a name="forecast_code_examples"></a>

下列程式碼範例示範如何使用 Amazon Forecast 搭配 AWS 軟體開發套件 (SDK)。

*Actions* 是大型程式的程式碼摘錄，必須在內容中執行。雖然動作會告訴您如何呼叫個別服務函數，但您可以在其相關情境中查看內容中的動作。

**其他資源**
+  **[Forecast 使用者指南](https://docs.aws.amazon.com/forecast/latest/dg/getting-started.html)** – Forecast 的詳細資訊。
+ **[Forecast API 參考](https://docs.aws.amazon.com/forecast/latest/dg/api-reference.html)** – 所有可用 Forecast 動作的詳細資訊。
+ **[AWS 開發人員中心](https://aws.amazon.com/developer/code-examples/?awsf.sdk-code-examples-product=product%23forecast)** – 您可以依類別或全文搜尋篩選的程式碼範例。
+ **[AWS SDK 範例](https://github.com/awsdocs/aws-doc-sdk-examples)** – GitHub 儲存庫使用慣用語言的完整程式碼。包含設定和執行程式碼的指示。

**Contents**
+ [基本概念](forecast_code_examples_basics.md)
  + [動作](forecast_code_examples_actions.md)
    + [`CreateDataset`](forecast_example_forecast_CreateDataset_section.md)
    + [`CreateForecast`](forecast_example_forecast_CreateForecast_section.md)
    + [`DeleteDataset`](forecast_example_forecast_DeleteDataset_section.md)
    + [`DeleteForecast`](forecast_example_forecast_DeleteForecast_section.md)
    + [`DescribeForecast`](forecast_example_forecast_DescribeForecast_section.md)
    + [`ListDatasetGroups`](forecast_example_forecast_ListDatasetGroups_section.md)
    + [`ListForecasts`](forecast_example_forecast_ListForecasts_section.md)

# 使用 AWS SDKs 預測的基本範例
<a name="forecast_code_examples_basics"></a>

下列程式碼範例示範如何搭配 AWS SDK 使用 Amazon Forecast 的基本功能。

**Contents**
+ [動作](forecast_code_examples_actions.md)
  + [`CreateDataset`](forecast_example_forecast_CreateDataset_section.md)
  + [`CreateForecast`](forecast_example_forecast_CreateForecast_section.md)
  + [`DeleteDataset`](forecast_example_forecast_DeleteDataset_section.md)
  + [`DeleteForecast`](forecast_example_forecast_DeleteForecast_section.md)
  + [`DescribeForecast`](forecast_example_forecast_DescribeForecast_section.md)
  + [`ListDatasetGroups`](forecast_example_forecast_ListDatasetGroups_section.md)
  + [`ListForecasts`](forecast_example_forecast_ListForecasts_section.md)

# 使用 AWS SDKs 預測的動作
<a name="forecast_code_examples_actions"></a>

下列程式碼範例示範如何使用 AWS SDKs 執行個別預測動作。每個範例均包含 GitHub 的連結，您可以在連結中找到設定和執行程式碼的相關說明。

 下列範例僅包含最常使用的動作。如需完整清單，請參閱《[Amazon Forecast API 參考](https://docs.aws.amazon.com/forecast/latest/dg/api-reference.html)》。

**Topics**
+ [`CreateDataset`](forecast_example_forecast_CreateDataset_section.md)
+ [`CreateForecast`](forecast_example_forecast_CreateForecast_section.md)
+ [`DeleteDataset`](forecast_example_forecast_DeleteDataset_section.md)
+ [`DeleteForecast`](forecast_example_forecast_DeleteForecast_section.md)
+ [`DescribeForecast`](forecast_example_forecast_DescribeForecast_section.md)
+ [`ListDatasetGroups`](forecast_example_forecast_ListDatasetGroups_section.md)
+ [`ListForecasts`](forecast_example_forecast_ListForecasts_section.md)

# `CreateDataset` 搭配 AWS SDK 使用
<a name="forecast_example_forecast_CreateDataset_section"></a>

以下程式碼範例顯示如何使用 `CreateDataset`。

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

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/forecast#code-examples)中設定和執行。

```
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;
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [CreateDataset](https://docs.aws.amazon.com/goto/SdkForJavaV2/forecast-2018-06-26/CreateDataset)。

------

# `CreateForecast` 搭配 AWS SDK 使用
<a name="forecast_example_forecast_CreateForecast_section"></a>

以下程式碼範例顯示如何使用 `CreateForecast`。

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

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/forecast#code-examples)中設定和執行。

```
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 "";
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [CreateForecast](https://docs.aws.amazon.com/goto/SdkForJavaV2/forecast-2018-06-26/CreateForecast)。

------

# `DeleteDataset` 搭配 AWS SDK 使用
<a name="forecast_example_forecast_DeleteDataset_section"></a>

以下程式碼範例顯示如何使用 `DeleteDataset`。

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

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/forecast#code-examples)中設定和執行。

```
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);
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [DeleteDataset](https://docs.aws.amazon.com/goto/SdkForJavaV2/forecast-2018-06-26/DeleteDataset)。

------

# `DeleteForecast` 搭配 AWS SDK 使用
<a name="forecast_example_forecast_DeleteForecast_section"></a>

以下程式碼範例顯示如何使用 `DeleteForecast`。

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

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/forecast#code-examples)中設定和執行。

```
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);
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [DeleteForecast](https://docs.aws.amazon.com/goto/SdkForJavaV2/forecast-2018-06-26/DeleteForecast)。

------

# `DescribeForecast` 搭配 AWS SDK 使用
<a name="forecast_example_forecast_DescribeForecast_section"></a>

以下程式碼範例顯示如何使用 `DescribeForecast`。

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

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/forecast#code-examples)中設定和執行。

```
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);
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [DescribeForecast](https://docs.aws.amazon.com/goto/SdkForJavaV2/forecast-2018-06-26/DescribeForecast)。

------

# `ListDatasetGroups` 搭配 AWS SDK 使用
<a name="forecast_example_forecast_ListDatasetGroups_section"></a>

以下程式碼範例顯示如何使用 `ListDatasetGroups`。

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

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/forecast#code-examples)中設定和執行。

```
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);
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [ListDatasetGroups](https://docs.aws.amazon.com/goto/SdkForJavaV2/forecast-2018-06-26/ListDatasetGroups)。

------

# `ListForecasts` 搭配 AWS SDK 使用
<a name="forecast_example_forecast_ListForecasts_section"></a>

以下程式碼範例顯示如何使用 `ListForecasts`。

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

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/forecast#code-examples)中設定和執行。

```
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);
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [ListForecasts](https://docs.aws.amazon.com/goto/SdkForJavaV2/forecast-2018-06-26/ListForecasts)。

------