HttpClient4.5を使用してProxy配下からアクセスする

GetSiteInfo.java

package howtohttpclient;

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

import org.apache.http.Header;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicHeader;
import org.apache.http.util.EntityUtils;

public class GetSiteInfo {

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

		//アクセス対象のURL
		String uri ="www.google.co.jp";
		String userAgent ="";

		//Proxyサーバと認証情報のセット
		CredentialsProvider credsProvider = new BasicCredentialsProvider();
        credsProvider.setCredentials(
                new AuthScope("proxy_host", proxyport),
                new UsernamePasswordCredentials("proxy_id", "proxy_password"));


        //ヘッダー情報のセット
        List<Header> headers = new ArrayList<Header>();
        headers.add(new BasicHeader("Accept-Charset","utf-8"));
        headers.add(new BasicHeader("Accept-Language","ja, en;q=0.8"));
        headers.add(new BasicHeader("User-Agent",userAgent));

        CloseableHttpClient httpclient = HttpClients.custom()
                .setDefaultCredentialsProvider(credsProvider)
                .setDefaultHeaders(headers).build();

		try {

            HttpHost target = new HttpHost(uri, 80, "http");
            HttpHost proxy = new HttpHost("proxy_host", porxy_port);

            RequestConfig config = RequestConfig.custom()
                .setProxy(proxy)
                .build();
            HttpGet httpget = new HttpGet("");
            httpget.setConfig(config);

            System.out.println("Executing request " + httpget.getRequestLine() + " to " + target + " via " + proxy);

            CloseableHttpResponse response = httpclient.execute(target, httpget);
            try {
                System.out.println("----------------------------------------");
                System.out.println(response.getStatusLine());
                System.out.println(EntityUtils.toString(response.getEntity()));
            } finally {
                response.close();
            }
        } finally {
            httpclient.close();
        }


	}
}