外观模式

Folgerjun · web-flow · commit f873122b605a · 2018-03-12T10:41:13.000+08:00
外观模式
diff --git a/java-des/src/com/java/design/facade/Facade.java b/java-des/src/com/java/design/facade/Facade.java
@@ -0,0 +1,36 @@
+package com.java.design.facade;
+
+public class Facade {
+
+	ServiceA serviceA;
+
+	ServiceB serviceB;
+
+	ServiceC serviceC;
+
+	public Facade() {
+
+		serviceA = new ServiceAImpl();
+		serviceB = new ServiceBImpl();
+		serviceC = new ServiceCImpl();
+	}
+
+	public void methodA() {
+		// 重组
+		serviceA.methodA();
+		serviceB.methodB();
+	}
+
+	public void methodB() {
+		// 重组
+		serviceB.methodB();
+		serviceC.methodC();
+	}
+
+	public void methodC() {
+		// 重组
+		serviceC.methodC();
+		serviceA.methodA();
+	}
+
+}
diff --git a/java-des/src/com/java/design/facade/FacadePattern.java b/java-des/src/com/java/design/facade/FacadePattern.java
@@ -0,0 +1,32 @@
+package com.java.design.facade;
+
+/**
+ * 外观模式 ----> 是一种使用频率非常高的结构型设计模式，它通过引入一个外观角色来简化客户端与子系统之间的交互，为复杂的子系统调用提供一个统一的入口，
+ * 降低子系统与客户端的耦合度，且客户端调用非常方便。
+ * 
+ * @author Administrator
+ *
+ */
+public class FacadePattern {
+
+	public static void main(String[] args) {
+
+		// 不根据外观调用
+		ServiceA serviceA = new ServiceAImpl();
+		ServiceB serviceB = new ServiceBImpl();
+		ServiceC serviceC = new ServiceCImpl();
+
+		serviceA.methodA();
+		serviceB.methodB();
+		serviceC.methodC();
+
+		System.out.println("----------------");
+
+		// 利用外观调用
+		Facade facade = new Facade();
+		facade.methodA();
+		facade.methodB();
+		facade.methodC();
+	}
+
+}
diff --git a/java-des/src/com/java/design/facade/ServiceA.java b/java-des/src/com/java/design/facade/ServiceA.java
@@ -0,0 +1,7 @@
+package com.java.design.facade;
+
+public interface ServiceA {
+
+	void methodA();
+
+}
diff --git a/java-des/src/com/java/design/facade/ServiceAImpl.java b/java-des/src/com/java/design/facade/ServiceAImpl.java
@@ -0,0 +1,10 @@
+package com.java.design.facade;
+
+public class ServiceAImpl implements ServiceA {
+
+	@Override
+	public void methodA() {
+
+		System.out.println("This is Method A ...");
+	}
+}
diff --git a/java-des/src/com/java/design/facade/ServiceB.java b/java-des/src/com/java/design/facade/ServiceB.java
@@ -0,0 +1,6 @@
+package com.java.design.facade;
+
+public interface ServiceB {
+
+	void methodB();
+}
diff --git a/java-des/src/com/java/design/facade/ServiceBImpl.java b/java-des/src/com/java/design/facade/ServiceBImpl.java
@@ -0,0 +1,10 @@
+package com.java.design.facade;
+
+public class ServiceBImpl implements ServiceB {
+
+	@Override
+	public void methodB() {
+
+		System.out.println("This is Method B ...");
+	}
+}
diff --git a/java-des/src/com/java/design/facade/ServiceC.java b/java-des/src/com/java/design/facade/ServiceC.java
@@ -0,0 +1,6 @@
+package com.java.design.facade;
+
+public interface ServiceC {
+
+	void methodC();
+}
diff --git a/java-des/src/com/java/design/facade/ServiceCImpl.java b/java-des/src/com/java/design/facade/ServiceCImpl.java
@@ -0,0 +1,10 @@
+package com.java.design.facade;
+
+public class ServiceCImpl implements ServiceC {
+
+	@Override
+	public void methodC() {
+
+		System.out.println("This is Method C ...");
+	}
+}
