用java实现路由选择算法。Dijkstra(迪杰斯特拉)算法是典型的单源最短路径算法，用于计算一个节点到其他所有节点的最短路径。-Java achieve routing algorithm. Dijkstra (Dijkstra) algorithm is a typical single-source shortest path algorithm is used to calculate a node to all other nodes in the shortest path.