借鉴了JHotDraw源码，开发单层状态图绘制工具， 支持三种遍历方法：CPP(中国邮递员算法)，广度优先算法，简化的广度优先算法 里面有三个后缀为draw的图形-Draws JHotDraw source code, developers monolayer state mapping tool, supports three traversal methods: CPP (Chinese postman algorithm), breadth-first algorith