用Java写程序：实现用AVL树存储身份信息类，同时AVL树的值是字符串身份证号码

好的，下面是用Java实现AVL树存储身份信息类的示例代码：

public class IdentityInfo {
    private String name;
    private String idNumber;
    
    public IdentityInfo(String name, String idNumber) {
        this.name = name;
        this.idNumber = idNumber;
    }
    
    public String getName() {
        return name;
    }
    
    public String getIdNumber() {
        return idNumber;
    }
}

public class AVLTreeNode {
    private IdentityInfo identityInfo;
    private AVLTreeNode left;
    private AVLTreeNode right;
    private int height;
    
    public AVLTreeNode(IdentityInfo identityInfo) {
        this.identityInfo = identityInfo;
        this.left = null;
        this.right = null;
        this.height = 1;
    }
    
    public IdentityInfo getIdentityInfo() {
        return identityInfo;
    }
    
    public AVLTreeNode getLeft() {
        return left;
    }
    
    public void setLeft(AVLTreeNode left) {
        this.left = left;
    }
    
    public AVLTreeNode getRight() {
        return right;
    }
    
    public void setRight(AVLTreeNode right) {
        this.right = right;
    }
    
    public int getHeight() {
        return height;
    }
    
    public void setHeight(int height) {
        this.height = height;
    }
}

public class AVLTree {
    private AVLTreeNode root;
    
    public AVLTree() {
        this.root = null;
    }
    
    private int getHeight(AVLTreeNode node) {
        if (node == null) {
            return 0;
        }
        return node.getHeight();
    }
    
    private int getBalanceFactor(AVLTreeNode node) {
        if (node == null) {
            return 0;
        }
        return getHeight(node.getLeft()) - getHeight(node.getRight());
    }
    
    private AVLTreeNode rotateLeft(AVLTreeNode node) {
        AVLTreeNode rightNode = node.getRight();
        AVLTreeNode leftRightNode = rightNode.getLeft();
        rightNode.setLeft(node);
        node.setRight(leftRightNode);
        node.setHeight(Math.max(getHeight(node.getLeft()), getHeight(node.getRight())) + 1);
        rightNode.setHeight(Math.max(getHeight(rightNode.getLeft()), getHeight(rightNode.getRight())) + 1);
        return rightNode;
    }
    
    private AVLTreeNode rotateRight(AVLTreeNode node) {
        AVLTreeNode leftNode = node.getLeft();
        AVLTreeNode rightLeftNode = leftNode.getRight();
        leftNode.setRight(node);
        node.setLeft(rightLeftNode);
        node.setHeight(Math.max(getHeight(node.getLeft()), getHeight(node.getRight())) + 1);
        leftNode.setHeight(Math.max(getHeight(leftNode.getLeft()), getHeight(leftNode.getRight())) + 1);
        return leftNode;
    }
    
    public void insert(IdentityInfo identityInfo) {
        this.root = insert(this.root, identityInfo);
    }
    
    private AVLTreeNode insert(AVLTreeNode node, IdentityInfo identityInfo) {
        if (node == null) {
            return new AVLTreeNode(identityInfo);
        }
        if (identityInfo.getIdNumber().compareTo(node.getIdentityInfo().getIdNumber()) < 0) {
            node.setLeft(insert(node.getLeft(), identityInfo));
        } else if (identityInfo.getIdNumber().compareTo(node.getIdentityInfo().getIdNumber()) > 0) {
            node.setRight(insert(node.getRight(), identityInfo));
        } else {
            return node;
        }
        node.setHeight(Math.max(getHeight(node.getLeft()), getHeight(node.getRight())) + 1);
        int balanceFactor = getBalanceFactor(node);
        if (balanceFactor > 1 && identityInfo.getIdNumber().compareTo(node.getLeft().getIdentityInfo().getIdNumber()) < 0) {
            return rotateRight(node);
        }
        if (balanceFactor < -1 && identityInfo.getIdNumber().compareTo(node.getRight().getIdentityInfo().getIdNumber()) > 0) {
            return rotateLeft(node);
        }
        if (balanceFactor > 1 && identityInfo.getIdNumber().compareTo(node.getLeft().getIdentityInfo().getIdNumber()) > 0) {
            node.setLeft(rotateLeft(node.getLeft()));
            return rotateRight(node);
        }
        if (balanceFactor < -1 && identityInfo.getIdNumber().compareTo(node.getRight().getIdentityInfo().getIdNumber()) < 0) {
            node.setRight(rotateRight(node.getRight()));
            return rotateLeft(node);
        }
        return node;
    }
    
    public IdentityInfo search(String idNumber) {
        AVLTreeNode node = search(this.root, idNumber);
        if (node == null) {
            return null;
        }
        return node.getIdentityInfo();
    }
    
    private AVLTreeNode search(AVLTreeNode node, String idNumber) {
        if (node == null || node.getIdentityInfo().getIdNumber().equals(idNumber)) {
            return node;
        }
        if (idNumber.compareTo(node.getIdentityInfo().getIdNumber()) < 0) {
            return search(node.getLeft(), idNumber);
        } else {
            return search(node.getRight(), idNumber);
        }
    }
}

在这个示例代码中，`IdentityInfo`类表示身份信息，包含`name`和`idNumber`字段。`AVLTreeNode`类表示AVL树中的节点，包含`identityInfo`、`left`、`right`和`height`字段。`AVLTree`类表示AVL树，包含`root`字段和`insert()`、`search()`等方法来操作AVL树。在`insert()`方法中，我们使用字符串身份证号码来比较节点大小，从而将新的身份信息插入到AVL树中。在`search()`方法中，我们也使用字符串身份证号码来搜索身份信息。