PostRequestTest.java

import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

import static java.net.http.HttpRequest.*;

public class PostRequestTest {
	public static void main(String[] args) throws IOException, InterruptedException {
		BodyPublisher body = BodyPublishers.ofString("{'id':1}");
		HttpRequest request = newBuilder()
			.POST(body)
			.uri(URI.create("http://httpbin.org/post"))
			.build();

		HttpClient httpClient = HttpClientBuilderTest.createHttpClient();
		HttpResponse<String> httpResponse = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
		System.out.println("Response: " + httpResponse.body());
	}
}