添加0235.二叉搜索树的最近公共祖先.md递归Java解法

problems/0235.二叉搜索树的最近公共祖先.md

@@ -234,7 +234,15 @@ public:
 ## Java 
 
 递归法：
-
+```java
+class Solution {
+    public TreeNode lowestCommonAncestor(TreeNode root, TreeNode p, TreeNode q) {
+        if (root.val > p.val && root.val > q.val) return lowestCommonAncestor(root.left, p, q);
+        if (root.val < p.val && root.val < q.val) return lowestCommonAncestor(root.right, p, q);
+        return root;
+    }
+}
+```
 
 迭代法：
 ```java