增加淘宝群内容，修改部分文件组织

数据结构(双语)/数据结构 day16【瑞客论坛 www.ruike1.com】/代码/00-leetcode/src/链表/_206_反转链表.java

@@ -0,0 +1,29 @@
+package 链表;
+
+public class _206_反转链表 {
+	
+	public ListNode reverseList(ListNode head) {
+		if (head == null || head.next == null) return head;
+	
+		ListNode newHead = reverseList(head.next);
+		head.next.next = head;
+		head.next = null;
+		return newHead;
+    }
+
+	
+	public ListNode reverseList2(ListNode head) {
+		if (head == null || head.next == null) return head;
+	
+		ListNode newHead = null;
+		while (head != null) {
+			ListNode tmp = head.next;
+			head.next = newHead;
+			newHead = head;
+			head = tmp;
+		}
+		
+		return newHead;
+    }
+
+}