Httpclient 4，错误302。如何重定向？

对于4.1版本：

DefaultHttpClient  httpclient = new DefaultHttpClient();    httpclient.setRedirectStrategy(new DefaultRedirectStrategy() {  public boolean isRedirected(HttpRequest request, HttpResponse response, HttpContext context)  { boolean isRedirect=false; try {     isRedirect = super.isRedirected(request, response, context); } catch (ProtocolException e) {     // TODO Auto-generated catch block     e.printStackTrace(); } if (!isRedirect) {     int responseCode = response.getStatusLine().getStatusCode();     if (responseCode == 301 || responseCode == 302) {         return true;     } } return isRedirect;        }    });