make a post request call using HttpClient in java

HttpClientPostJSON.java

package com.mkyong.java11.jep321;

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

public class HttpClientPostJSON {

    private static final HttpClient httpClient = HttpClient.newBuilder()
            .version(HttpClient.Version.HTTP_2)
            .connectTimeout(Duration.ofSeconds(10))
            .build();

    public static void main(String[] args) throws IOException, InterruptedException {

        // json formatted data
        String json = new StringBuilder()
                .append("{")
                .append("\"name\":\"mkyong\",")
                .append("\"notes\":\"hello\"")
                .append("}").toString();

        // add json header
        HttpRequest request = HttpRequest.newBuilder()
                .POST(HttpRequest.BodyPublishers.ofString(json))
                .uri(URI.create("https://httpbin.org/post"))
                .setHeader("User-Agent", "Java 11 HttpClient Bot") // add request header
                .header("Content-Type", "application/json")
                .build();

        HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());

        // print status code
        System.out.println(response.statusCode());

        // print response body
        System.out.println(response.body());

    }

}

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EMoisky 100 points

                                    package com.zetcode;

import com.fasterxml.jackson.databind.ObjectMapper;

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

public class HttpClientPost {

    public static void main(String[] args) throws IOException, InterruptedException {

        var values = new HashMap&lt;String, String&gt;() {{
            put(&quot;name&quot;, &quot;John Doe&quot;);
            put (&quot;occupation&quot;, &quot;gardener&quot;);
        }};

        var objectMapper = new ObjectMapper();
        String requestBody = objectMapper
                .writeValueAsString(values);

        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create(&quot;https://httpbin.org/post&quot;))
                .POST(HttpRequest.BodyPublishers.ofString(requestBody))
                .build();

        HttpResponse&lt;String&gt; response = client.send(request,
                HttpResponse.BodyHandlers.ofString());

        System.out.println(response.body());
    }
}

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