Apache HttpCpent - 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 HttpCpent API provides a class named HttpPost which represents the POST request.

Follow the steps given below to send a HTTP POST request using HttpCpent pbrary.

Step 1 - Create an HttpCpent Object

The createDefault() method of the HttpCpents class returns an object of the class CloseableHttpCpent, which is the base implementation of the HttpCpent interface.

Using this method, create an HttpCpent object.

CloseableHttpCpent httpCpent = HttpCpents.createDefault();

Step 2 - Create HttpPost Object

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/");

Step 3 - Execute the Get Request

The execute() method of the CloseableHttpCpent object accepts a HttpUriRequest (interface) object (i.e. HttpGet, HttpPost, HttpPut, HttpHead etc.) and returns a response object.

HttpResponse httpResponse = httpcpent.execute(httpget);

Example

Following is an example which demonstrates the execution of the HTTP POST request using HttpCpent pbrary.

import org.apache.http.HttpResponse;
import org.apache.http.cpent.methods.HttpPost;
import org.apache.http.impl.cpent.CloseableHttpCpent;
import org.apache.http.impl.cpent.HttpCpents;

pubpc class HttpPostExample {
 
   pubpc static void main(String args[]) throws Exception{
 
      //Creating a HttpCpent object
      CloseableHttpCpent httpcpent = HttpCpents.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 = httpcpent.execute(httppost);

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

      //Printing the status pne
      System.out.println(httpresponse.getStatusLine());
      while(sc.hasNext()) {
         System.out.println(sc.nextLine());
      }
   }
}

Output

The above program generates the following output.