Apache HttpClient - Http Post Request

A POST request is used to send data to the server; for example, customer information, file
upload, etc., using HTML forms.
The HttpClient API provides a class named HttpPost which represents the POST request.
Follow the steps given below to send a HTTP POST request using HttpClient library.
The createDefault() method of the HttpClients class returns an object of the class CloseableHttpClient, which is the base implementation of the HttpClient interface.
Using this method, create an HttpClient object.
CloseableHttpClient httpClient = HttpClients.createDefault();

The HttpPost class represents the HTTP POST request. This sends required data and retrieves the information of the given server using a URI.
Create this request by instantiating the HttpPost class and pass a string value representing the URI, as a parameter to its constructor.
HttpGet httpGet = new HttpGet("http://www.tutorialspoint.com/");

The execute() method of the CloseableHttpClient object accepts a HttpUriRequest (interface) object (i.e. HttpGet, HttpPost, HttpPut, HttpHead etc.) and returns a response object.
HttpResponse httpResponse = httpclient.execute(httpget);

Following is an example which demonstrates the execution of the HTTP POST request using
HttpClient library.
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

public class HttpPostExample {
 
   public static void main(String args[]) throws Exception{
 
      //Creating a HttpClient object
      CloseableHttpClient httpclient = HttpClients.createDefault();

      //Creating a HttpGet object
      HttpPost httppost = new HttpPost("https://www.tutorialspoint.com/");

      //Printing the method used
      System.out.println("Request Type: "+httppost.getMethod());

      //Executing the Get request
      HttpResponse httpresponse = httpclient.execute(httppost);

      Scanner sc = new Scanner(httpresponse.getEntity().getContent());

      //Printing the status line
      System.out.println(httpresponse.getStatusLine());
      while(sc.hasNext()) {
         System.out.println(sc.nextLine());
      }
   }
}
The above program generates the following output.
Request Type: POST
<!DOCTYPE html>
<!--[if IE 8]><html class = "ie ie8"> <![endif]-->
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