基于SSH整合员工管理系统的增强版，内容包括：部门和员工的增删改查，部门修改，员工相应的修改，部门删除，员工对应部门的删除(An enhanced version of the employee management system based on SSH, including the revision of department and staff, the modification of the department, the corresponding revision of the staff, the removal of the department, and the deletion of the corresponding department)