1. Apache HttpClient:
import org.apache.http.HttpEntity;
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;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
public class ApacheHttpClientExample {
public static void main(String[] args) {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet("http://example.com/api");
try {
HttpResponse response = httpClient.execute(httpGet);
HttpEntity entity = response.getEntity();
if (entity != null) {
String result = EntityUtils.toString(entity);
System.out.println(result);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
2. OkHttp:
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import java.io.IOException;
public class OkHttpExample {
public static void main(String[] args) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("http://example.com/api")
.build();
try {
Response response = client.newCall(request).execute();
String result = response.body().string();
System.out.println(result);
} catch (IOException e) {
e.printStackTrace();
}
}
}
3. Spring RestTemplate:
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;
public class RestTemplateExample {
public static void main(String[] args) {
RestTemplate restTemplate = new RestTemplate();
ResponseEntity<String> response = restTemplate.getForEntity("http://example.com/api", String.class);
String result = response.getBody();
System.out.println(result);
}
}
