JSP开发中Apache-HTTPClient 用户验证的实例详解

public class HttpClientUtils {  protected static final Logger LOG = LoggerFactory.getLogger(HttpClientUtils.class);  private static final String AUTHENKEY = "Authorization";  private static final String BASICKEY = "Basic ";  public static String getConnect(String url,String username,String password) {    CloseableHttpResponse response = null;    CloseableHttpClient client = HttpClients.createDefault();    HttpGet httpGet = new HttpGet(url);    Base64 token = new Base64();    String authenticationEncoding = token.encodeAsString(new String(username + ":" + password).getBytes());    httpGet.setHeader(AUTHENKEY, BASICKEY + authenticationEncoding);    String responseContent = "";    try {      response = client.execute(httpGet);      HttpEntity entity = response.getEntity();      responseContent = EntityUtils.toString(entity, "UTF-8");    } catch (IOException e) {      LOG.error(e.toString());    } finally {      if (response != null) {        try {          response.close();        } catch (IOException e) {          LOG.error(e.toString());        }      }      if (client != null) {        try {          client.close();        } catch (IOException e) {          LOG.error(e.toString());        }      }    }    return responseContent;  }}