调用java类打印的列子，程序首先搜索默认打印机，如果没有就报错，这里就是打印文件自身。- Transfers a java kind of printing Liezi, the procedure first searches tacitly approves the printer, if has not been wrong on the newspaper, here prints document oneself.

Excel 文件通用打印程序，象打印数据库文件一样操作、打印机和Excel文件。-Universal Print programs Excel file, database file operations such as printing, printers, and Excel files.