1. Apache HttpClient
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
public class HttpClientExample {
public static void main(String[] args) throws Exception {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet("https://api.example.com/");
HttpResponse response = httpclient.execute(httpGet);
System.out.println(response.getStatusLine());
httpclient.close();
}
}
2. OkHttp
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class OkHttpExample {
public static void main(String[] args) throws Exception {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("https://api.example.com/")
.build();
Response response = client.newCall(request).execute();
System.out.println(response.code());
response.close();
}
}
3. Spring RestTemplate
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;
public class RestTemplateExample {
public static void main(String[] args) throws Exception {
RestTemplate restTemplate = new RestTemplate();
ResponseEntity<String> responseEntity = restTemplate.getForEntity("https://api.example.com/", String.class);
int statusCode = responseEntity.getStatusCodeValue();
System.out.println(statusCode);
}
}
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
public class HttpClientConfigExample {
public static void main(String[] args) throws Exception {
RequestConfig requestConfig = RequestConfig.custom()
.setConnectTimeout(5000)
.build();
CloseableHttpClient httpclient = HttpClients.custom()
.setDefaultRequestConfig(requestConfig)
.setUserAgent("My User Agent")
.build();
HttpGet httpGet = new HttpGet("https://api.example.com/");
HttpResponse response = httpclient.execute(httpGet);
System.out.println(response.getStatusLine());
httpclient.close();
}
}
