How to Send a POST Request with Parameters in Java Using Apache HttpClient?

Sending HTTP POST Request In Java

The goal is to send data (id = 10) to a remote server using the POST method. The Java code provided attempts to open a connection to the remote URL, but fails to specify the POST request parameters.

Solution Using Apache HttpClient

Apache HttpClient is a popular Java library for sending and receiving HTTP requests. Here's how to achieve POST functionality in Java using it:

HttpClient httpclient = HttpClients.createDefault();
HttpPost httppost = new HttpPost("http://www.example.com/page.php");

// Request parameters
List<NameValuePair> params = new ArrayList<>();
params.add(new BasicNameValuePair("id", "10"));

// Set request parameters encoded in UTF-8 as POST body
httppost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));

// Execute the HTTP POST request
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();

// Handle response
if (entity != null) {
    // Process response body, e.g., print the HTML content
    InputStream instream = entity.getContent();
}

In this updated solution, the deprecated classes from the older Apache HTTP Components version have been replaced with their newer equivalents.

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