访问者模式

Folgerjun · web-flow · commit 277b9b7c42f1 · 2018-03-12T10:51:16.000+08:00
访问者模式
diff --git a/java-des/src/com/java/design/visitor/BodyA.java b/java-des/src/com/java/design/visitor/BodyA.java
@@ -0,0 +1,14 @@
+package com.java.design.visitor;
+
+public class BodyA {
+
+	public void seeABody() {
+
+		System.out.println("I see A の  Body ...");
+	}
+
+	public void seeBBody(BodyB b) {
+		b.seeBBody(this);
+	}
+
+}
diff --git a/java-des/src/com/java/design/visitor/BodyB.java b/java-des/src/com/java/design/visitor/BodyB.java
@@ -0,0 +1,13 @@
+package com.java.design.visitor;
+
+public class BodyB {
+
+	public void seeABody(BodyA a) {
+		a.seeABody();
+	}
+
+	public void seeBBody(BodyA a) {
+		System.out.println("Want to see B の  Body ? hehe ...");
+		a.seeABody();
+	}
+}
diff --git a/java-des/src/com/java/design/visitor/VisitorPattern.java b/java-des/src/com/java/design/visitor/VisitorPattern.java
@@ -0,0 +1,18 @@
+package com.java.design.visitor;
+
+/**
+ * 访问者模式 -----> 表示一个作用于其对象结构中的各元素的操作，它使你可以在不改变各元素类的前提下定义作用于这些元素的新操作
+ * 
+ * @author Administrator
+ *
+ */
+public class VisitorPattern {
+
+	public static void main(String[] args) {
+
+		BodyA bodyA = new BodyA();
+		bodyA.seeABody();
+		bodyA.seeBBody(new BodyB());
+	}
+
+}
