翻訳をJavaで実行してみるソース

AzureService.java

import javax.net.ssl.HttpsURLConnection;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.UUID;
import java.util.stream.Collectors;

public class AzureService {
    private static final String OCP_APIM_SUBSCRIPTION_KEY = "Ocp-Apim-Subscription-Key";

    private static final String AUTH_API_URL = "https://api.cognitive.microsoft.com/sts/v1.0/issueToken";

    private static final String SUBSCRIPTION_KEY = "ここに取得したキー";

    private static final String TRANSLATOR_TEXT_API_URL = "https://api.microsofttranslator.com/v2/http.svc/Translate?";

    private String getAccessToken() {
        try {
            URL url = new URL(AUTH_API_URL);

            HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setRequestProperty(OCP_APIM_SUBSCRIPTION_KEY, SUBSCRIPTION_KEY);
            connection.setDoOutput(true);
            OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());
            out.close();

            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                try (BufferedReader reader = new BufferedReader(new InputStreamReader(
                        connection.getInputStream(), StandardCharsets.UTF_8.name()))) {
                    return reader.lines().collect(Collectors.joining());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public String translate(String target) {
        try {
            String appId = URLEncoder.encode("Bearer " + getAccessToken(), StandardCharsets.UTF_8.name());
            String text = URLEncoder.encode(target, StandardCharsets.UTF_8.name());

            String accessUrl = TRANSLATOR_TEXT_API_URL
                    + "appid="
                    + appId
                    + "&"
                    + "text="
                    + text
                    + "&"
                    + "from=en&to=ja";

            URL url = new URL(accessUrl);
            HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.setRequestProperty("Accept", "application/xml");
            connection.setRequestProperty("X-ClientTraceId", UUID.randomUUID().toString());

            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                try (BufferedReader reader = new BufferedReader(new InputStreamReader(
                        connection.getInputStream(), StandardCharsets.UTF_8.name()))) {
                    return reader.lines().collect(Collectors.joining()).replaceAll("<.+?>", "");
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String ... arg) {
        System.out.println(new AzureService().translate("Partly sunny"));
    }
}