Como consumir a API de CNPJ em Java?

1<project xmlns="http://maven.apache.org/POM/4.0.0"
2  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
3  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
4  <modelVersion>4.0.0</modelVersion>
5  <groupId>com.exemplo</groupId>
6  <artifactId>integracao-apifordevs</artifactId>
7  <version>1.0.0</version>
8  <properties>
9    <maven.compiler.release>17</maven.compiler.release>
10    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
11  </properties>
12  <dependencies>
13    <dependency>
14      <groupId>com.fasterxml.jackson.core</groupId>
15      <artifactId>jackson-databind</artifactId>
16      <version>2.18.6</version>
17    </dependency>
18  </dependencies>
19  <build><plugins>
20    <plugin>
21      <groupId>org.apache.maven.plugins</groupId>
22      <artifactId>maven-compiler-plugin</artifactId>
23      <version>3.14.1</version>
24    </plugin>
25  </plugins></build>
26</project>

1$env:AFD_PUBLIC_KEY="afd_test_pk_..."
2$env:AFD_SECRET_KEY="seu_segredo_de_desenvolvimento"
3$env:AFD_PROJECT_ID="proj_..."

1export AFD_PUBLIC_KEY="afd_test_pk_..."
2export AFD_SECRET_KEY="seu_segredo_de_desenvolvimento"
3export AFD_PROJECT_ID="proj_..."

1import java.net.URI;
2import java.net.http.*;
3import java.nio.charset.StandardCharsets;
4import java.time.Duration;
5import java.util.*;
6import com.fasterxml.jackson.databind.*;
7
8public class Integracao {
9  static final ObjectMapper JSON = new ObjectMapper();
10  static String env(String key) {
11    String value = System.getenv(key);
12    if (value == null || value.isBlank()) throw new IllegalArgumentException("Configure " + key);
13    return value;
14  }
15  static JsonNode read(HttpResponse<String> response) throws Exception {
16    JsonNode payload = JSON.readTree(response.body());
17    if (response.statusCode() >= 400 || !payload.path("success").asBoolean()) {
18      List<String> codes = new ArrayList<>();
19      payload.path("errors").forEach(error -> codes.add(error.path("code").asText()));
20      throw new IllegalStateException("HTTP " + response.statusCode() + " " + codes
21        + " Retry-After=" + response.headers().firstValue("Retry-After").orElse(""));
22    }
23    return payload;
24  }
25  public static void main(String[] args) throws Exception {
26    var client = HttpClient.newBuilder().connectTimeout(Duration.ofSeconds(30)).build();
27    String basic = Base64.getEncoder().encodeToString(
28      (env("AFD_PUBLIC_KEY") + ":" + env("AFD_SECRET_KEY")).getBytes(StandardCharsets.UTF_8));
29    String operationKey = UUID.randomUUID().toString();
30    var ping = HttpRequest.newBuilder(URI.create("https://api.apifordevs.com/api/v1/ping/billable?dev_mode=true"))
31      .timeout(Duration.ofSeconds(30)).header("Authorization", "Basic " + basic)
32      .header("X-Project-Id", env("AFD_PROJECT_ID")).header("Idempotency-Key", operationKey).GET().build();
33    System.out.println(read(client.send(ping, HttpResponse.BodyHandlers.ofString())));
34    var cnpj = HttpRequest.newBuilder(URI.create("https://api.apifordevs.com/api/v1/cnpj/00000000007951"))
35      .timeout(Duration.ofSeconds(30)).GET().build();
36    System.out.println(read(client.send(cnpj, HttpResponse.BodyHandlers.ofString())).path("data").get(0));
37  }
38}

1mvn compile
2mvn org.codehaus.mojo:exec-maven-plugin:3.5.0:java -Dexec.mainClass=Integracao