poi表格操作setColumnWidth异常处理(The maximum column width 255）

参考：https://blog.csdn.net/qq_35384887/article/details/79010745

void setSizeColumn(Sheet sheet, int size) {
    for (int columnNum = 0; columnNum < size; columnNum++) {
        int columnWidth = sheet.getColumnWidth(columnNum) / 256;
        for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {
        	Row currentRow;
            if (sheet.getRow(rowNum) == null) {
                currentRow = sheet.createRow(rowNum);
            } else {
                currentRow = sheet.getRow(rowNum);
            }
            if (currentRow.getCell(columnNum) != null) {
                Cell currentCell = currentRow.getCell(columnNum);
                if (currentCell.getCellTypeEnum() == CellType.STRING) {
                    int length = currentCell.getStringCellValue().getBytes().length;
                    if (columnWidth < length) {
                        columnWidth = length;
                    }
                }
            }
        }
        if(columnWidth*2<255){
        	sheet.setColumnWidth(columnNum, columnWidth* 2 * 256);
        }else{
            sheet.setColumnWidth(columnNum,6000);
        }
    }
}