Quickstart: Use the Bing News Search Java client library

Artigo
10/28/2020

Use this quickstart to begin searching for news with the Bing News Search client library for Java. While Bing News Search has a REST API compatible with most programming languages, the client library provides an easy way to integrate the service into your applications. The source code for this sample can be found on GitHub.

Prerequisites

Install the Bing News Search client library dependencies using Maven, Gradle, or another dependency management system. The Maven POM file requires the following declaration:

    <dependencies>
    <dependency>
        <groupId>com.microsoft.azure.cognitiveservices</groupId>
        <artifactId>azure-cognitiveservices-newssearch</artifactId>
        <version>0.0.1-beta-SNAPSHOT</version>
    </dependency>
    </dependencies>

Create and initialize a project

Create a new Java project in your favorite IDE or editor, and import the following libraries.

import com.microsoft.azure.cognitiveservices.newssearch.*;
import com.microsoft.azure.cognitiveservices.newssearch.implementation.NewsInner;
import com.microsoft.azure.cognitiveservices.newssearch.implementation.NewsSearchAPIImpl;
import com.microsoft.azure.cognitiveservices.newssearch.implementation.TrendingTopicsInner;
import com.microsoft.rest.credentials.ServiceClientCredentials;
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import java.io.IOException;

Create a search client and store credentials

Create a method called getClient() that returns a new NewsSearchAPIImpl search client. Add your endpoint as the first parameter for the newNewsSearchAPIImpl object, and a new ServiceClientCredentials object to store your credentials.
```
public static NewsSearchAPIImpl getClient(final String subscriptionKey) {
    return new NewsSearchAPIImpl("https://api.bing.microsoft.com/bing/v7.0/",
            new ServiceClientCredentials() {
            });
}
```

To create the ServiceClientCredentials object, override the applyCredentialsFilter() function. Pass a OkHttpClient.Builder to the method, and use the builder's addNetworkInterceptor() method to create your credentials for the client library call.

new ServiceClientCredentials() {
    @Override
    public void applyCredentialsFilter(OkHttpClient.Builder builder) {
        builder.addNetworkInterceptor(
                new Interceptor() {
                    @Override
                    public Response intercept(Chain chain) throws IOException {
                        Request request = null;
                        Request original = chain.request();
                        // Request customization: add request headers.
                        Request.Builder requestBuilder = original.newBuilder()
                                .addHeader("Ocp-Apim-Subscription-Key", subscriptionKey);
                        request = requestBuilder.build();
                        return chain.proceed(request);
                    }
                });
    }
});

Send and receive a search request

Create a method that calls getClient() and sends a search request to the Bing News Search service. Filter the search with the market and count parameters, then print information about the first news result: name, URL, publication date, description, provider name, and total number of estimated matches for your search.

public static void newsSearch(String subscriptionKey)
{
    NewsSearchAPIImpl client = getClient(subscriptionKey);
    String searchTerm = "Quantum Computing";

    NewsInner newsResults = client.searchs().list(searchTerm, null, null, null,
            null, null, 100, null, "en-us",
            null, null, null, null, null,
            null, null);

    if (newsResults.value().size() > 0)
    {
        NewsArticle firstNewsResult = newsResults.value().get(0);

        System.out.println(String.format("TotalEstimatedMatches value: %d", newsResults.totalEstimatedMatches()));
        System.out.println(String.format("News result count: %d", newsResults.value().size()));
        System.out.println(String.format("First news name: %s", firstNewsResult.name()));
        System.out.println(String.format("First news url: %s", firstNewsResult.url()));
        System.out.println(String.format("First news description: %s", firstNewsResult.description()));
        System.out.println(String.format("First news published time: %s", firstNewsResult.datePublished()));
        System.out.println(String.format("First news provider: %s", firstNewsResult.provider().get(0).name()));
    }
    else
    {
        System.out.println("Couldn't find news results!");
    }

}

Add your search method to a main() method to execute the code.

public static void main(String[] args) {
    String subscriptionKey = "YOUR-SUBSCRIPTION-KEY";
    NewsSearchSDK.newsSearch(subscriptionKey);
}

Next steps

Create a single-page web app

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