public String formatRawCellContents(double value, int formatIndex, String formatString) {
        return formatRawCellContents(value, formatIndex, formatString, false);
    }
Formats the given raw cell value, based on the supplied format index and string, according to excel style rules.

@see #formatCellValue(Cell)
fastexcel-test/src/test/java/cn/idev/excel/test/temp/dataformat/DataFormatter1.java