1.JDBC 2021-01-15
导包问题1: https://www.cnblogs.com/JuniorProgramer/p/14284261.html
导包问题2: https://www.cnblogs.com/JuniorProgramer/p/14284255.html
Eclipse截图，一截图错误提示就消失: https://www.cnblogs.com/JuniorProgramer/p/14284271.html
准备运行Java程序没有Run Application选项: https://www.cnblogs.com/JuniorProgramer/p/14284281.html
新版MySQL获取数据库连接和旧版不同之处: https://www.cnblogs.com/JuniorProgramer/p/14284287.html