基于ssm(springMVC)框架集合了ztree，bootstrap前端框架和activiti工作流开发的OA系统，多方面覆盖了java的知识点和工作中常见的bug处理方法。(Based on the SSM (springMVC) framework, ztree, bootstrap front-end frame and activiti workflow developed OA system, covering the knowledge points of Java and co