经典的Dijkstra算法，采用贪婪技术，考虑单起点最短路径问题：对于加权连通图的一个称为起点的给定节点，求出它到所有其他顶点之间的一系列最短路径。- The classical Dijkstra algorithm, the greedy technique, consider single source shortest path problem: for weighted connected graph of a known as the starting point of a