<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.13</version> </dependency> import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.HttpClientBuilder; public class HttpExample { public static void main(String[] args) throws Exception { String url = "http://example.com"; HttpClient client = HttpClientBuilder.create().build(); HttpGet request = new HttpGet(url); HttpResponse response = client.execute(request); // ... } } import org.apache.http.HttpHeaders; // ... HttpGet request = new HttpGet(url); request.setHeader(HttpHeaders.CONTENT_TYPE, "application/json");