根据List中某一个属性值取交集过滤

TreeNode node = new TreeNode();
        List list1 = new ArrayList<>();
        node.setId("6");
        node.setParentId("1");
        list1.add(node);
        
        node = new TreeNode();
        node.setId("7");
        node.setParentId("1");
        list1.add(node);
 
        List list2 = new ArrayList<>();
        node = new TreeNode();
        node.setId("3");
        node.setParentId("6");
        list2.add(node);
 
 
        List intersectA = list1.stream().filter(
                        a -> list2.stream().map(
                                TreeNode::getParentId).anyMatch(
                                parentId -> Objects.equals(a.getId(), parentId)))
                .collect(Collectors.toList());