1,暴力解法:直接找到根节点,然后开始中序排列,将结果储存在队列中,再取出
时间复杂度:O(n)
空间复杂度:O(n)

public class Solution {
    reeLinkNode root;
    TreeLinkNode Node;
    Queuequeue = new LinkedList();
public TreeLinkNode GetNext(TreeLinkNode pNode){
    if(pNode == null) return null;
    root = pNode;
    while(root.next != null){
    root = root.next;
    }
    Queue queue = get(root);
    while(true){
        Node = queue.poll();
        if( Node == pNode)
            break;
    }
    return queue.poll();
}
public Queue get(TreeLinkNode root){
    if(root == null) return null;
    get(root.left);
    queue.offer(root);
    get(root.right);
    return queue;
}
}