java get request code example

Example 1: java http request

// open a connection, the request method is "GET" by default
URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();

connection.setRequestMethod("GET");
connection.setRequestProperty("Content-Type", "application/json");

// you can use one of these methods to get the results
connection.connect();
connection.getResponseCode();
connection.getInputStream();
connection.getOutputStream();

// close the connection
connection.disconnect();

Example 2: http java.net post

//Exemple :
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<String, String>() {{
            put("name", "John Doe");
            put ("occupation", "gardener");
        }};

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

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

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

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