code: public static void readUtf8Lines(File file, LineHandler lineHandler) throws IORuntimeException {
  		readLines(file, CharsetUtil.CHARSET_UTF_8, lineHandler);
  	}
docs: 按行处理文件内容，编码为UTF-8
  
  @param file 文件
  @param lineHandler {@link LineHandler}行处理器
  @throws IORuntimeException IO异常