JAVA

java http request post

HttpClient httpclient = HttpClients.createDefault();
HttpPost httppost = new HttpPost("http://www.a-domain.com/foo/");

// Request parameters and other properties.
List<NameValuePair> params = new ArrayList<NameValuePair>(2);
params.add(new BasicNameValuePair("param-1", "12345"));
params.add(new BasicNameValuePair("param-2", "Hello!"));
httppost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

//Execute and get the response.
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();

if (entity != null) {
    try (InputStream instream = entity.getContent()) {
        // do something useful
    }
}

How to Implement GET and POST Requests With Java

public static void MyGETRequest() throws IOException {
    URL urlForGetRequest = new URL("https://jsonplaceholder.typicode.com/posts/1");
    String readLine = null;
    HttpURLConnection conection = (HttpURLConnection) urlForGetRequest.openConnection();
    conection.setRequestMethod("GET");
    conection.setRequestProperty("userId", "a1bcdef"); // set userId its a sample here
    int responseCode = conection.getResponseCode();


    if (responseCode == HttpURLConnection.HTTP_OK) {
        BufferedReader in = new BufferedReader(
            new InputStreamReader(conection.getInputStream()));
        StringBuffer response = new StringBuffer();
        while ((readLine = in .readLine()) != null) {
            response.append(readLine);
        } in .close();
        // print result
        System.out.println("JSON String Result " + response.toString());
        //GetAndPost.POSTRequest(response.toString());
    } else {
        System.out.println("GET NOT WORKED");
    }

}