HttpClient 4.x : POST

package hello.httpclient4x;

import java.util.ArrayList;
import java.util.List;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class HelloPostMain {

	public static void main(String[] args) throws Exception {

		CloseableHttpClient httpclient = HttpClients.createDefault();
		try {

			List<NameValuePair> params = new ArrayList<NameValuePair>();

			params.add(new BasicNameValuePair("key1", "value1"));

			HttpPost httpPost = new HttpPost(
					"http://localhost:8080/HelloWeb/index.jsp");
			httpPost.setEntity(new UrlEncodedFormEntity(params));

			System.err
					.println("Executing request " + httpPost.getRequestLine());

			CloseableHttpResponse response = httpclient.execute(httpPost);
			try {
				System.err.println(response.getStatusLine());
				// EntityUtils.consume(response.getEntity());

				System.err.println(response.getStatusLine().getStatusCode());

				Header[] headers = response.getAllHeaders();
				for (Header header : headers) {
					System.err.println(header.getName() + ": "
							+ header.getValue());
				}

				HttpEntity httpEntity = response.getEntity();
				System.err.println(EntityUtils.toString(httpEntity));

			} finally {
				response.close();
			}
		} finally {
			httpclient.close();
		}
	}

}