使用 Java 应用程序与 Amazon Lex V2 机器人进行交互

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使用 Java 应用程序与 Amazon Lex V2 机器人进行交互 - Amazon Lex

适用于 Java 的 AWS SDK 2.0 提供了一个接口，可用于在 Java 应用程序中与机器人进行交互。使用 SDK for Java 来为用户构建客户端应用程序。

以下应用程序与您在中创建的 OrderFlowers 机器人进行交互。练习 1：根据示例创建机器人它使用适用于 Java 的 SDK 调用该RecognizeText操作来与机器人进行对话。LexRuntimeV2Client

该对话的输出如下所示：


User : I would like to order flowers
Bot  : What type of flowers would you like to order?
User : 1 dozen roses
Bot  : What day do you want the dozen roses to be picked up?
User : Next Monday
Bot  : At what time do you want the dozen roses to be picked up?
User : 5 in the evening
Bot  : Okay, your dozen roses will be ready for pickup by 17:00 on 2021-01-04.  Does this sound okay?
User : Yes
Bot  : Thanks.

有关在客户端应用程序与 Amazon Lex V2 机器人之间发送的 JSON 结构，请参阅练习 2：查看对话流程。

要运行应用程序，您需要提供以下信息：

“botId”：您在创建机器人时为该机器人指定的标识符。您可以在 Amazon Lex V2 控制台的机器人设置页面上看到该机器人 ID。
botAliasId — 创建机器人别名时分配给它的标识符。您可以在 Amazon Lex V2 控制台的别名页面上看到该机器人别名 ID。如果列表中未显示别名 ID，请选择右上角的齿轮图标并打开别名 ID。
“localeId”：您用于机器人的区域设置的标识符。有关区域设置列表，请参阅Amazon Lex V2 支持的语言和区域设置。
“accessKey”和“secretKey”：您账户的身份验证密钥。如果您没有一组密钥，请使用 AWS Identity and Access Management 控制台进行创建。
“sessionId”：与 Amazon Lex V2 机器人会话的标识符。在这种情况下，代码使用随机的 UUID。
“region”：如果您的机器人不在美国东部（弗吉尼亚州北部）区域，请务必更改“区域”设置。

应用程序使用名为 getRecognizeTextRequest 的函数创建对机器人的单独请求。该函数使用必要参数生成一个请求以发送到 Amazon Lex V2。



package com.lex.recognizetext.sample;

import software.amazon.awssdk.auth.credentials.AwsBasicCredentials;
import software.amazon.awssdk.auth.credentials.AwsCredentialsProvider;
import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.lexruntimev2.LexRuntimeV2Client;
import software.amazon.awssdk.services.lexruntimev2.model.RecognizeTextRequest;
import software.amazon.awssdk.services.lexruntimev2.model.RecognizeTextResponse;

import java.net.URISyntaxException;
import java.util.UUID;


/**
 * This is a sample application to interact with a bot using RecognizeText API.
 */
public class OrderFlowersSampleApplication {

    public static void main(String[] args) throws URISyntaxException, InterruptedException {
        String botId = "";
        String botAliasId = "";
        String localeId = "en_US";
        String accessKey = "";
        String secretKey = "";
        String sessionId = UUID.randomUUID().toString();
        Region region = Region.US_EAST_1; // pick an appropriate region

        AwsBasicCredentials awsCreds = AwsBasicCredentials.create(accessKey, secretKey);
        AwsCredentialsProvider awsCredentialsProvider = StaticCredentialsProvider.create(awsCreds);

        LexRuntimeV2Client lexV2Client = LexRuntimeV2Client
                .builder()
                .credentialsProvider(awsCredentialsProvider)
                .region(region)
                .build();

        // utterance 1
        String userInput = "I would like to order flowers";
        RecognizeTextRequest recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        RecognizeTextResponse recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });

        // utterance 2
        userInput = "1 dozen roses";
        recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });

        // utterance 3
        userInput = "next monday";
        recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });

        // utterance 4
        userInput = "5 in evening";
        recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });

        // utterance 5
        userInput = "Yes";
        recognizeTextRequest = getRecognizeTextRequest(botId, botAliasId, localeId, sessionId, userInput);
        recognizeTextResponse = lexV2Client.recognizeText(recognizeTextRequest);

        System.out.println("User : " + userInput);
        recognizeTextResponse.messages().forEach(message -> {
            System.out.println("Bot : " + message.content());
        });
    }

    private static RecognizeTextRequest getRecognizeTextRequest(String botId, String botAliasId, String localeId, String sessionId, String userInput) {
        RecognizeTextRequest recognizeTextRequest = RecognizeTextRequest.builder()
                .botAliasId(botAliasId)
                .botId(botId)
                .localeId(localeId)
                .sessionId(sessionId)
                .text(userInput)
                .build();
        return recognizeTextRequest;
    }
}