现在有好多初学jsp的网友经常会问数据库怎么连接啊，怎么老出错啊？所以我集中的在这写篇文章供大家参考，其实这种把数据库逻辑全部放在jsp里未必是好的做法，但是有利于初学者学习，所以我就这样做了，当大家学到一定程度的时候，可以考虑用MVC的模式开发-There are a lot of jsp beginner users often ask how to connect database ah, how old wrong ah? Therefore, I shall concentrate in this write articles for your reference, in fact, all of this logic on the database in jsp is not necessarily good practice, but is conducive to learning for beginners, so I do this, when the U.S. learned to some extent , we can consider the use of MVC pattern of development