Following
step-by-step procedure explains how to send simple HTTP GET request using
Apache HTTP client.
Step 1: Create HTTP Client instance.
CloseableHttpClient
httpclient = HttpClients.createDefault();
CloseableHttpClient
is the base implementation of HttpClient.
Step 2: Create HTTP GET request by initializing HttpGet
class.
HttpGet
httpget = new
HttpGet("https://self-learning-java-tutorial.blogspot.com");
Above
snippet is used to send GET request to the URI https://self-learning-java-tutorial.blogspot.com. HTTPGet constructor throws
IllegalArgumentException if the uri is invalid.
Step 3: Call execute method of httpclient.
CloseableHttpResponse
response = httpclient.execute(httpget);
Above
statement executes the httpget request.
Following is
the complete working application.
import java.io.IOException; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; 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; public class Main { public static void printResponse(HttpResponse response) { System.out.println(response.getProtocolVersion()); System.out.println(response.getStatusLine().getStatusCode()); System.out.println(response.getStatusLine().getReasonPhrase()); System.out.println(response.getStatusLine().toString()); } public static void main(String args[]) throws ClientProtocolException, IOException { CloseableHttpClient httpclient = HttpClients.createDefault(); HttpGet httpget = new HttpGet( "https://self-learning-java-tutorial.blogspot.com"); CloseableHttpResponse response = httpclient.execute(httpget); try { printResponse(response); } finally { response.close(); } } }
Output
HTTP/1.1 200 OK HTTP/1.1 200 OK
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