递归小笔记:

@Override
public Long[] findCatelogPath(Long catelogId) {
    List<Long> paths = new ArrayList<>();
    List<Long> parentPath = findParentPath(catelogId, paths);
    Collections.reverse(parentPath);
    return (Long[]) parentPath.toArray();
}

private List<Long> findParentPath(Long catelogId, List<Long> paths) {
    //收集当前节点id
    paths.add(catelogId);
    CategoryEntity byId = this.getById(catelogId);
    if(byId.getParentCid() != 0) {
        findParentPath(byId.getParentCid(), paths)
    }
    return paths;
}