How to Make an HTTP POST Request with JSON in Java?

Make an HTTP POST Request with JSON in Java

HTTP POST requests are often used to send data to a server. This article demonstrates how to create an HTTP POST request in Java using JSON.

Apache HttpClient Setup

To make HTTP requests, we'll utilize the Apache HttpClient. First, add the dependency to your project:

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.13</version>
</dependency>

Creating the POST Request

HttpPost request = new HttpPost("http://www.site.com"); // Replace with your URL

Adding JSON Body

String json = "{\"name\":\"myname\",\"age\":\"20\"}";
StringEntity params = new StringEntity(json);
params.setContentType("application/json");
request.setEntity(params);

Processing the Request

HttpClient httpClient = HttpClientBuilder.create().build();
HttpResponse response = httpClient.execute(request);

Handling the Response

Depending on your application logic, you can parse the response to extract the relevant data.

Lack of POST Method in JSON

The JSON API doesn't define a dedicated POST method since it provides a representation of data, not a mechanism for making requests.

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