一个简单的记事本程序，总体功能和Notepad类似，区别是信息的保存和读取是和mysql数据库相关联的，并且可以分级别显示文档，根据时间新旧显示文档-A simple Notepad program, the overall function and is similar to Notepad, the difference is the preservation and reading of information is associated and mysql database, and t