下面是使用Python实现遍历AVL树并使用nextInOrder的代码示例：

class Node:
    def __init__(self, val=None):
        self.val = val
        self.left = None
        self.right = None
        self.height = 1

class AVLTree:
    def __init__(self):
        self.root = None

    def height(self, node):
        if not node:
            return 0
        return node.height

    def getBalance(self, node):
        if not node:
            return 0
        return self.height(node.left) - self.height(node.right)

    def rotateRight(self, z):
        y = z.left
        T3 = y.right

        y.right = z
        z.left = T3

        z.height = 1 + max(self.height(z.left), self.height(z.right))
        y.height = 1 + max(self.height(y.left), self.height(y.right))

        return y

    def rotateLeft(self, z):
        y = z.right
        T2 = y.left

        y.left = z
        z.right = T2

        z.height = 1 + max(self.height(z.left), self.height(z.right))
        y.height = 1 + max(self.height(y.left), self.height(y.right))

        return y

    def insert(self, root, val):
        if not root:
            return Node(val)

        if val < root.val:
            root.left = self.insert(root.left, val)
        else:
            root.right = self.insert(root.right, val)

        root.height = 1 + max(self.height(root.left), self.height(root.right))

        balance = self.getBalance(root)

        if balance > 1 and val < root.left.val:
            return self.rotateRight(root)

        if balance < -1 and val > root.right.val:
            return self.rotateLeft(root)

        if balance > 1 and val > root.left.val:
            root.left = self.rotateLeft(root.left)
            return self.rotateRight(root)

        if balance < -1 and val < root.right.val:
            root.right = self.rotateRight(root.right)
            return self.rotateLeft(root)

        return root

    def getNextInOrder(self, node):
        if node.right:
            node = node.right
            while node.left:
                node = node.left
            return node

        while node.parent and node == node.parent.right:
            node = node.parent

        return node.parent

    def inOrderTraversal(self, root):
        current = self.getNextInOrder(root)

        while current:
            print(current.val)
            current = self.getNextInOrder(current)

# 使用示例
avl = AVLTree()
avl.root