如何使用Java更新Excel中的值

Question

func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
var returnValue = CGFloat()

if (dataArray.count > 0) {
    let stringData = dataArray[indexPath.row] as NSString
    let constraintRect = CGSize(width: 280.0, height: CGFloat.max)
    //get height of the string used
    let boundingBox = stringData.boundingRectWithSize(constraintRect, options: NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: [NSFontAttributeName: UIFont.systemFontOfSize(15.0)], context: nil)
        return boundingBox.height + CGFloat(85.0)
    }
    else{
        returnValue = CGFloat(85.0);
    }
   return returnValue;
}

这里只写第一列。如何在excel文件中写入所有列？