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/06-二叉搜索树2/src/com/mj/printer/BinaryTrees.java

@@ -0,0 +1,48 @@
+package com.mj.printer;
+
+/**
+ * 
+ * @author MJ Lee
+ *
+ */
+public final class BinaryTrees {
+
+	private BinaryTrees() {
+	}
+
+	public static void print(BinaryTreeInfo tree) {
+		print(tree, null);
+	}
+
+	public static void println(BinaryTreeInfo tree) {
+		println(tree, null);
+	}
+
+	public static void print(BinaryTreeInfo tree, PrintStyle style) {
+		if (tree == null || tree.root() == null) return;
+		printer(tree, style).print();
+	}
+
+	public static void println(BinaryTreeInfo tree, PrintStyle style) {
+		if (tree == null || tree.root() == null) return;
+		printer(tree, style).println();
+	}
+
+	public static String printString(BinaryTreeInfo tree) {
+		return printString(tree, null);
+	}
+
+	public static String printString(BinaryTreeInfo tree, PrintStyle style) {
+		if (tree == null || tree.root() == null) return null;
+		return printer(tree, style).printString();
+	}
+
+	private static Printer printer(BinaryTreeInfo tree, PrintStyle style) {
+		if (style == PrintStyle.INORDER) return new InorderPrinter(tree);
+		return new LevelOrderPrinter(tree);
+	}
+
+	public enum PrintStyle {
+		LEVEL_ORDER, INORDER
+	}
+}