httpclient4.x配置带用户名和密码的代理

package test;

import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;
import org.apache.http.auth.NTCredentials;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.params.ConnRoutePNames;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;


public class ClientProxy {
???
??? private static String PROXY_HOST="";
??? private static int PROXY_PORT=8080;
??? private static String PROXY_USERNAME="";
??? private static String PROXY_PASSWORD="";
??? private static String PROXY_WORKSTATION="";
??? private static String PROXY_DOMAIN="";
??? private static String TARGET_HOST="";
??? private static String TARGET_GETURL="/index.html";
???
??? public static void main(String[] args) throws Exception {

??? ??? DefaultHttpClient httpclient = new DefaultHttpClient();
??????? try {
??????? ??? AuthScope authscope=new AuthScope(PROXY_HOST, PROXY_PORT);
??????? ??? Credentials credentials=new NTCredentials(PROXY_USERNAME,PROXY_PASSWORD,PROXY_WORKSTATION,PROXY_DOMAIN);
??????????? httpclient.getCredentialsProvider().setCredentials(authscope,credentials);
??????????? HttpHost targetHost = new HttpHost(TARGET_HOST);
??????????? HttpHost proxy = new HttpHost(PROXY_HOST, PROXY_PORT);
??????????? httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);
??????????? HttpGet httpget = new HttpGet(TARGET_GETURL);
???????????
??????????? System.out.println("executing request: " + httpget.getRequestLine());
??????????? System.out.println("via proxy: " + proxy);
??????????? System.out.println("to target: " + targetHost);
??????????? HttpResponse response = httpclient.execute(targetHost, httpget);
??????????? HttpEntity entity = response.getEntity();
??????????? System.out.println("----------------------------------------");
??????????? System.out.println(response.getStatusLine());
??????????? if (entity != null) {
??????????????? System.out.println("Response content length: " + entity.getContentLength());
??????????? }
??????????? EntityUtils.consume(entity);
??????? } finally {
??????????? httpclient.getConnectionManager().shutdown();
??????? }
??? }
}