java以post方式请求https协议网站报错

public class HttpsUtil{
private static class TrustAnyTrustManager implements X509TrustManager {
		public void checkClientTrusted(X509Certificate[] chain, String authType)
				throws CertificateException {
		}
		public void checkServerTrusted(X509Certificate[] chain, String authType)
				throws CertificateException {
		}
		public X509Certificate[] getAcceptedIssuers() {
			return new X509Certificate[] {};
		}
}
private static class TrustAnyHostnameVerifier implements HostnameVerifier {
		public boolean verify(String hostname, SSLSession session) {
			return true;
		}
}
/**
* post方式请求服务器(https协议)
* @param url
*            请求地址
* @param content
*            参数
* @param charset
*            编码
* @return
* @throws NoSuchAlgorithmException
* @throws KeyManagementException
* @throws IOException
*/
public static byte[] post(String url, String content, String charset)
			throws NoSuchAlgorithmException, KeyManagementException,
			IOException {
		SSLContext sc = SSLContext.getInstance("SSL");
		sc.init(null, new TrustManager[] { new TrustAnyTrustManager() },
				new java.security.SecureRandom());
		URL console = new URL(url);
		HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
		conn.setSSLSocketFactory(sc.getSocketFactory());
		conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
		conn.connect();
		DataOutputStream out = new DataOutputStream(conn.getOutputStream());
		out.write(content.getBytes(charset));
		// 刷新、关闭
		out.flush();
		out.close();
		InputStream is = conn.getInputStream();
		if (is != null) {
			ByteArrayOutputStream outStream = new ByteArrayOutputStream();
			byte[] buffer = new byte[1024];
			int len = 0;
			while ((len = is.read(buffer)) != -1) {
				outStream.write(buffer, 0, len);
			}
			is.close();
			return outStream.toByteArray();
		}
		return null;
}
}

这种方法访问报错：
[16:38:19.303] java.lang.IllegalArgumentException: protocol = https host = null