docs: private static String unwrapQuote(String value) {
  		if (null == value) {
  			return null;
  		}
  		value = value.trim();
  
  		int from = 0;
  		int to = value.length();
  		char startChar = value.charAt(0);
  		char endChar = value.charAt(to - 1);
  		if (startChar == endChar) {
  			if ('\'' == startChar || '"' == startChar) {
  				from = 1;
  				to = to - 1;
  			}
  		}
  
  		if (from == 0 && to == value.length()) {
  			// 并不包含，返回原值
  			return value;
  		}
  		return value.substring(from, to);
  	}