docs: public static String convert(String source, Charset srcCharset, Charset destCharset) {
  		if(null == srcCharset) {
  			srcCharset = StandardCharsets.ISO_8859_1;
  		}
  		
  		if(null == destCharset) {
  			destCharset = StandardCharsets.UTF_8;
  		}
  		
  		if (StrUtil.isBlank(source) || srcCharset.equals(destCharset)) {
  			return source;
  		}
  		return new String(source.getBytes(srcCharset), destCharset);
  	}