ubuntu下qt操作Excel，使用xlslib，基本功能以及封装，包括设置字体，合并单元格，设置行高度和宽度，添加边框，设置单元格背景等功能。-ubuntu qt operating under Excel, use xlslib, basic functions and packages, including setting fonts, merge cells, set the row height and width, add borders, set the cell background and other functions.