将集合转换成具有层级结构的map、写了一天了没想出怎么实现、有没有大lao9⃣️9⃣️我！！

Question

将集合转换成具有层级结构的map、写了一天了没想出怎么实现、有没有大lao9⃣️9⃣️我！！（正文非得30个字么，我上哪儿编30个字去）

Answer 1

public static void main(String[] args) {
        List<String> pathList = Arrays.asList("/etc/hosts", "/etc/kubernetes/ssl/certs", "/root");
        Map<String, Object> resultMap = pathListToMap(pathList);
        System.out.println(resultMap);
    }

    public static Map<String, Object> pathListToMap(List<String> pathList) {
        Map<String, Object> resultMap = new HashMap<>();
        pathList.forEach(path -> {
            String[] pathSplitArray = path.split("/");
            // 每个目录循环时需要记录上层目录的对象
            Map<String, Object> parentObj = null;
            for (int i = 0; i < pathSplitArray.length; i++) {
                if (StringUtils.isEmpty(pathSplitArray[i])) {
                    continue;
                }
                parentObj = parentObj == null ? resultMap : parentObj;
                Object currentObj = parentObj.get(pathSplitArray[i]);
                if (currentObj == null) {
                    currentObj = new HashMap<>();
                    parentObj.put(pathSplitArray[i], currentObj);
                }
                parentObj = (Map) currentObj;
            }
        });
        return resultMap;
    }