设计模式之外观模式

外观模式

不知道我讲解完这个模式之后，你们会不会骂我是傻逼，这种也好意思叫模式？

不就是一起调用吗？我的天啊！

public class CPU 
{
	public static final Logger LOGGER = Logger.getLogger(CPU.class);
	public void start()
	{
		LOGGER.info("cpu is start...");
	}

	public void shutDown()
	{
		LOGGER.info("CPU is shutDown...");
	}
}

public class Disk
{
	public static final Logger LOGGER = Logger.getLogger(Disk.class);
	public void start()
	{
		LOGGER.info("Disk is start...");
	}

	public void shutDown()
	{
		LOGGER.info("Disk is shutDown...");
	}
}


public class Memory
{
	public static final Logger LOGGER = Logger.getLogger(Memory.class);
	public void start()
	{
		LOGGER.info("Memory is start...");
	}

	public void shutDown()
	{
		LOGGER.info("Memory is shutDown...");
	}
}


/**
 * 外观类（核心），然后就没有了，你们是不是觉得好好的一个调用，起了个名字“外观模式”，搞得劳资都不懂了。
 */
public class Computer
{
	public static final Logger LOGGER = Logger.getLogger(Computer.class);

	private CPU cpu;
	private Memory memory;
	private Disk disk;
	public Computer()
	{
		cpu = new CPU();
		memory = new Memory();
		disk = new Disk();
	}
	public void start()
	{
		LOGGER.info("Computer start begin");
		cpu.start();
		disk.start();
		memory.start();
		LOGGER.info("Computer start end");
	}

	public void shutDown()
	{
		LOGGER.info("Computer shutDown begin");
		cpu.shutDown();
		disk.shutDown();
		memory.shutDown();
		LOGGER.info("Computer shutDown end...");
	}
}
​

韩寒说的没错：所谓的博士，就是把人人都懂得事情，说的 TMD 人人都不懂