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....Document doc = new Document (); // 向文档对象添加一个新页面 Page page = doc . getPages...add ( background ); // 保存文档 doc . save ( _dataDir + "BackGround...