private static DecimalFormat createIntegerOnlyFormat(String fmt) {
        DecimalFormatSymbols dsf = DecimalFormatSymbols.getInstance(Locale.ROOT);
        DecimalFormat result = new DecimalFormat(fmt, dsf);
        result.setParseIntegerOnly(true);
        return result;
    }
@return a <tt>DecimalFormat</tt> with parseIntegerOnly set <code>true</code>
fastexcel-test/src/test/java/cn/idev/excel/test/temp/dataformat/DataFormatter1.java