北京化工大学数据库原理课程设计，基于Java web 的学生选课系统，使用原生 Servlet 和 jsp进行开发，没有使用其它框架，技术比较古老，但是对于理解其它框架具有很好的帮助，建议初学者参考，想要做一些真正可以使用的项目，简化开发，提高性能的，建议使用框架，请移步我另外一个仓库：https://github.com/qianqianjun/Educational-management 该仓库使用目前最新的 spring boot 框架，代码十分清晰，对于基本的功能路程都有完整的代码示例，特别适合学习（之前我一点一点查阅博客，看教程视频做的，很麻烦，这份代码去掉了过时方法，填补了一些坑，对于不清楚的解释，概念等给出了很好的代码示例方便理解，作为学习资料可以节省很多时间）
是不是没有建表语句
我想运行学习一下，但是遇到了问题，已经通过db.java连接了本地数据库，数据表也创建成功了，但是点击登录出现了LoginServlet的404错误Error Description: The origin server did not find a currnt representation for the target resource or it not willing to disclose that one exists.请问是否是我的配置出现问题了，麻烦您了
jar包麻烦上传一下，谢谢
老师您好，有一个问题就是我将数据库和前端已经链接完成但登陆时输入数据库中的账号密码还是会有无法登录的情况，请问老师如何解决
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