#

Junjie

昨天 3372040097ad2c01aeb6fd6485e89f19bf81b316

 src/main/java/com/zy/common/utils/NavigateSolution.java

@@ -183,6 +183,18 @@
            int maxPaths,    // 最大返回条数. 建议：100/500/2000；<=0 表示不限制（不建议）
            int maxCost      // 最大总代价(含拐点惩罚). <=0 表示不限制
    ) {
        return allSimplePaths(map, start, end, maxDepth, maxPaths, maxCost, Collections.emptyList());
    }

    public List<List<NavigateNode>> allSimplePaths(
            List<List<NavigateNode>> map,
            NavigateNode start,
            NavigateNode end,
            int maxDepth,
            int maxPaths,
            int maxCost,
            List<Integer> guideStationIds
    ) {
        List<List<NavigateNode>> results = new ArrayList<>();
        if (map == null || map.isEmpty() || map.get(0).isEmpty()) return results;
        if (start == null || end == null) return results;
@@ -197,13 +209,16 @@
        path.add(start);

        AtomicInteger pathCount = new AtomicInteger(0);
        Map<Integer, NavigateNode> guideNodeMap = buildGuideNodeMap(map, guideStationIds);

        dfsAllSimplePaths(map, start, end,
                visited, path, results,
                0,  // depth
                0,  // cost
                maxDepth, maxPaths, maxCost,
                pathCount
                pathCount,
                guideStationIds,
                guideNodeMap
        );

        return results;
@@ -224,7 +239,9 @@
            int maxDepth,
            int maxPaths,
            int maxCost,
            AtomicInteger pathCount
            AtomicInteger pathCount,
            List<Integer> guideStationIds,
            Map<Integer, NavigateNode> guideNodeMap
    ) {
        // 防爆：条数限制
        if (maxPaths > 0 && pathCount.get() >= maxPaths) return;
@@ -242,6 +259,7 @@
        // 扩展邻居（严格复用你自己的可行走方向规则）
        ArrayList<NavigateNode> neighbors = extend_current_node(map, current);
        if (neighbors == null || neighbors.isEmpty()) return;
        neighbors = sortNeighborsByGuide(current, path, neighbors, guideStationIds, guideNodeMap);

        for (NavigateNode next : neighbors) {
            // 防爆：条数限制
@@ -271,7 +289,9 @@
                    depth + 1,
                    newCost,
                    maxDepth, maxPaths, maxCost,
                    pathCount
                    pathCount,
                    guideStationIds,
                    guideNodeMap
            );

            // 回溯
@@ -284,6 +304,112 @@
        return n.getX() + "_" + n.getY();
    }

    private Map<Integer, NavigateNode> buildGuideNodeMap(List<List<NavigateNode>> map, List<Integer> guideStationIds) {
        Map<Integer, NavigateNode> guideNodeMap = new HashMap<>();
        if (map == null || map.isEmpty() || guideStationIds == null || guideStationIds.isEmpty()) {
            return guideNodeMap;
        }
        for (Integer stationId : guideStationIds) {
            if (stationId == null || guideNodeMap.containsKey(stationId)) {
                continue;
            }
            NavigateNode stationNode = findStationNavigateNode(map, stationId);
            if (stationNode != null) {
                guideNodeMap.put(stationId, stationNode);
            }
        }
        return guideNodeMap;
    }

    private ArrayList<NavigateNode> sortNeighborsByGuide(NavigateNode current,
                                                         LinkedList<NavigateNode> path,
                                                         ArrayList<NavigateNode> neighbors,
                                                         List<Integer> guideStationIds,
                                                         Map<Integer, NavigateNode> guideNodeMap) {
        if (current == null || neighbors == null || neighbors.size() <= 1
                || guideStationIds == null || guideStationIds.isEmpty()
                || guideNodeMap == null || guideNodeMap.isEmpty()) {
            return neighbors;
        }

        Integer nextGuideStationId = resolveNextGuideStationId(path, guideStationIds);
        if (nextGuideStationId == null) {
            return neighbors;
        }
        NavigateNode guideTargetNode = guideNodeMap.get(nextGuideStationId);
        if (guideTargetNode == null) {
            return neighbors;
        }

        neighbors.sort((left, right) -> compareGuideNeighbor(current, left, right, nextGuideStationId, guideTargetNode));
        return neighbors;
    }

    private Integer resolveNextGuideStationId(LinkedList<NavigateNode> path, List<Integer> guideStationIds) {
        if (path == null || path.isEmpty() || guideStationIds == null || guideStationIds.isEmpty()) {
            return null;
        }

        int cursor = 0;
        Set<Integer> seen = new HashSet<>();
        for (NavigateNode node : path) {
            Integer stationId = extractStationId(node);
            if (stationId == null || !seen.add(stationId)) {
                continue;
            }
            if (cursor < guideStationIds.size() && stationId.equals(guideStationIds.get(cursor))) {
                cursor++;
            }
        }
        if (cursor >= guideStationIds.size()) {
            return null;
        }
        return guideStationIds.get(cursor);
    }

    private int compareGuideNeighbor(NavigateNode current,
                                     NavigateNode left,
                                     NavigateNode right,
                                     Integer nextGuideStationId,
                                     NavigateNode guideTargetNode) {
        int leftDirect = isGuideStation(left, nextGuideStationId) ? 0 : 1;
        int rightDirect = isGuideStation(right, nextGuideStationId) ? 0 : 1;
        if (leftDirect != rightDirect) {
            return Integer.compare(leftDirect, rightDirect);
        }

        int leftDistance = calcNodeCost(left, guideTargetNode);
        int rightDistance = calcNodeCost(right, guideTargetNode);
        if (leftDistance != rightDistance) {
            return Integer.compare(leftDistance, rightDistance);
        }

        int leftTurnCost = calcNodeExtraCost(current, left, guideTargetNode);
        int rightTurnCost = calcNodeExtraCost(current, right, guideTargetNode);
        if (leftTurnCost != rightTurnCost) {
            return Integer.compare(leftTurnCost, rightTurnCost);
        }

        return 0;
    }

    private boolean isGuideStation(NavigateNode node, Integer stationId) {
        Integer nodeStationId = extractStationId(node);
        return nodeStationId != null && nodeStationId.equals(stationId);
    }

    private Integer extractStationId(NavigateNode node) {
        if (node == null || !"devp".equals(node.getNodeType())) {
            return null;
        }
        try {
            JSONObject valueObj = JSON.parseObject(node.getNodeValue());
            return valueObj == null ? null : valueObj.getInteger("stationId");
        } catch (Exception ignore) {
            return null;
        }
    }

    public ArrayList<NavigateNode> extend_current_node(List<List<NavigateNode>> map, NavigateNode current_node) {
        //获取当前结点的x, y
        int x = current_node.getX();