public Response delete(String url, PostParameter[] params)
			throws WeiboException {
		if (0 != params.length) {
			String encodedParams = HttpClient.encodeParameters(params);
			if (-1 == url.indexOf("?")) {
				url += "?" + encodedParams;
			} else {
				url += "&" + encodedParams;
			}
		}
		DeleteMethod deleteMethod = new DeleteMethod(url);
		return httpRequest(deleteMethod);

	}