熟练掌握ifelse的使用，掌握系统开发的流程，适合新手-Ifelse master the use of process control system development, suitable for beginners

Java Excel API is an open source java library to read, write and modify Excel spread sheets. This requires the library jxl-2.6.12.jar to be in classpath. The following example shows how to add ifelse formula to a Cell in Excel Sprea