外观模式：其实就是对调用复杂的业务进行再一次封装，给客户一个简单接口API。

代码如下:

package com.mkf.pattern;public interface InterfaceOne {	public void operationOne();}package com.mkf.pattern.impl;import com.mkf.pattern.InterfaceOne;public class ClassOne implements InterfaceOne {	@Override	public void operationOne() {		System.out.println("复杂业务逻辑ONE  " + ClassOne.class.getName());	}}package com.mkf.pattern;public interface InterfaceTwo {	public void operationTwo();}package com.mkf.pattern.impl;import com.mkf.pattern.InterfaceTwo;public class ClassTwo implements InterfaceTwo {	@Override	public void operationTwo() {		System.out.println("复杂业务逻辑TWO  " + ClassTwo.class.getName());	}}package com.mkf.pattern;public interface InterfaceOther {	public void operation();}package com.mkf.pattern.impl;import com.mkf.pattern.InterfaceOne;import com.mkf.pattern.InterfaceOther;import com.mkf.pattern.InterfaceTwo;public class ClassOther implements InterfaceOther {	private InterfaceOne io;	private InterfaceTwo it;	public ClassOther() {		this.io = new ClassOne();		this.it = new ClassTwo();	}	@Override	public void operation() {		System.out.println("调用外观（封装）");		io.operationOne();		it.operationTwo();	}}package com.mkf;import com.mkf.pattern.InterfaceOther;import com.mkf.pattern.impl.ClassOther;public class TestFacade {	/**	 * @param args	 */	public static void main(String[] args) {		InterfaceOther other = new ClassOther();		other.operation();	}}

执行结果：

调用外观（封装）