1. Apache HttpClient:
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
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;
public class HttpClientExample {
public static void main(String[] args) throws Exception {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet("http://example.com");
try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
HttpEntity entity = response.getEntity();
String responseBody = EntityUtils.toString(entity);
System.out.println(responseBody);
}
}
}
2. OkHttp:
import okhttp3.*;
import java.io.IOException;
public class OkHttpExample {
public static void main(String[] args) throws Exception {
OkHttpClient client = new OkHttpClient();
MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\"key\":\"value\"}");
Request request = new Request.Builder()
.url("http://example.com")
.post(body)
.build();
try (Response response = client.newCall(request).execute()) {
System.out.println(response.body().string());
}
}
}
3. HttpURLConnection:
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class HttpURLConnectionExample {
public static void main(String[] args) throws Exception {
URL url = new URL("http://example.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
try (BufferedReader reader = new BufferedReader(
new InputStreamRead(new connection.getInputStream()))) {
String line;
StringBuilder response = new StringBuilder();
while ((line = reader.readLine()) != null) {
response.append(line);
}
System.out.println(response.toString());
}
}
}
