HttpClient 4.x : GET

package hello.httpclient4x;

import java.net.URI;
import java.util.ArrayList;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
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 HelloGetMain {

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

		CloseableHttpClient httpclient = HttpClients.createDefault();

		try {

			String url = "http://localhost:8080/HelloWeb/index.jsp";
			String method = "";

			ArrayList<NameValuePair> nvps = new ArrayList<NameValuePair>();
			nvps.add(new BasicNameValuePair("msg", "ハロー"));

			URI serviceUri = new URIBuilder(url + method) //
					.setParameters(nvps)//
					.build();

			System.err.println(serviceUri.toString());

			HttpGet httpget = new HttpGet(serviceUri);

			System.out.println("Executing request " + httpget.getRequestLine());

			CloseableHttpResponse response = httpclient.execute(httpget);

			// response.getEntity().getContent() -> InputStream

			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();
		}
	}
}