北京地铁线路查询

public static void readFile() {   //读取地铁线路图信息
        File file = new File(readFile);
        BufferedReader reader = null;

        try {
            InputStreamReader inputStreamReader = new InputStreamReader(new FileInputStream(file),"UTF-8");
            reader = new BufferedReader(inputStreamReader);
            String line = null;
            String linename = "1";
            while ((line = reader.readLine()) != null) {
                if (line.trim().startsWith("*")) {
                    String[] lineInfo = line.substring(1).split("-");
                    lineSet.add(getLine(lineInfo[1].trim(),lineInfo[0].trim()));
                }
            }
        } catch (IOException e) {e.printStackTrace();} 
        finally {}
    }

private void BFS(Graph g,Station gg) {
//查找最短路径
        Queue<Station> queue = new LinkedList<>();
        visitedV.add(gg);//设置起始站点，即输入的站点
        queue.add(gg);//将站点入栈
        while (false == queue.isEmpty()) {
            Station ver = queue.poll();
            List<Station> toBeVisitedV = g.getV_edgeList_map().get(ver);
            for (Station v : toBeVisitedV) {
               if (false == visitedV.contains(v)) {
                    visitedV.add(v);
                    path.put(v,ver);
                    queue.add(v);
                }
            }
        }
    }