Send GET/POST request with Spring Framework

Add httpclient to dependency list

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<dependency>     <groupId>org.apache.httpcomponents</groupId>     <artifactId>httpclient</artifactId>     <version>4.5.6</version> </dependency>

Below is an HttpUtil to send GET/POST request using Spring RequestTemplate

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import org.springframework.http.client.HttpComponentsClientHttpRequestFactory; import org.springframework.web.client.RequestTemplate;   public class HttpUtil {     private static final int DEFAULT_TIMEOUT = 1000;// 1second     private static final HttpUtil INSTANCE = new HttpUtil();     private RequestTemplate rest;     private HttpComponentsClientHttpRequestFactory requestFactory;       private HttpUtil() {         requestFactory = new HttpComponentsClientHttpRequestFactory();         requestFactory.setReadTimeout(DEFAULT_TIMEOUT);         requestFactory.setConnectionTimeout(DEFAULT_TIMEOUT);         rest = new RestTemplate(requestFactory);     }       public static HttpUtil getInstance() {         return INSTANCE;     }           public <T> T get(String url, Class<T> responseClass) {         return rest.getForObject(url, responseClass);     }           public <T> T post(String url, Object requestBody, Class<T> responseClass) {         return rest.postForObject(url, requestBody, responseClass);     }       }