ztree导航树，sping构架，jdbc配置数据库连接，jdbc配置文件在src下-ztree navigation tree, sping frame, jdbc configure the database connection, jdbc configuration files under the src

用servlet+jsp+zTree控件实现树形展示，其中数据库表的设计非常好，不是平常的父子关系，而是用左右关系来描述父子关系。(Servlet+jsp+zTree control to achieve tree display, in which the database table design is very good, not an ordinary father son relationship, but to describe the relationship between fa