code: public SSLSocketFactory build() throws NoSuchAlgorithmException, KeyManagementException{
  		SSLContext sslContext = SSLContext.getInstance(protocol);
  		sslContext.init(this.keyManagers, this.trustManagers, this.secureRandom);
  		return sslContext.getSocketFactory();
  	}
docs: 构建SSLSocketFactory
  @return SSLSocketFactory
  @throws NoSuchAlgorithmException 无此算法
  @throws KeyManagementException Key管理异常