Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms.... Chart类的toImage方法将图表转换为图像文件,可保存到磁盘或流中。...ChartCollection charts = sheet . Charts ; // Adding a chart to the worksheet...