中文说明：基于迪杰斯特拉算法的路径搜索算法，本文给出四种不同的类型的dijkstra算法，以及对该算法的概述文档。很是实用！
English Description：
Path searching algorithm based on Dijkstra algorithm, this paper presents four different types of Dijkstra algorithm, as well as the overview document for this algorithm. Very useful!