docs: public Charset getCharset() {
  		Charset charset = null;
  		final String charsetName = getCharsetName();
  		if (StrUtil.isNotBlank(charsetName)) {
  			try {
  				charset = Charset.forName(charsetName);
  			} catch (UnsupportedCharsetException e) {
  				// ignore
  			}
  		}
  		return charset;
  	}