设计模式 状态模式

首先写一个State类

package State;
import Work.Work;

public abstract class State {
	public abstract void WriteProgram(Work w); 
}

再写六个状态用来继承

package State;
import Work.Work;

public class ForenoonState extends State{

	@Override
	public void WriteProgram(Work w) {
		// TODO Auto-generated method stub
		if(w.getHour()<12)
		{
			System.out.println("当前时间："+w.getHour()+"上午工作，精神百倍");
		}
		else
		{
			w.setState(new NoonState());
			w.WriteProgram();
		}
	}

}

package State;

import Work.Work;

public class NoonState extends State{

	@Override
	public void WriteProgram(Work w) {
		// TODO Auto-generated method stub
		if(w.getHour()<13)
		{
			System.out.println("当前时间："+w.getHour()+"饿了，午饭；犯困，午休");
		}
		else
		{
			w.setState(new AfternonState());
			w.WriteProgram();
			
		}
	}

}

package State;

import Work.Work;

public class AfternonState extends State{

	@Override
	public void WriteProgram(Work w) {
		// TODO Auto-generated method stub
		if(w.getHour()<17)
		{
			System.out.println("当前时间："+w.getHour()+"下午状态还不错，继续努力");
		}
		else
		{
			w.setState(new EveningState());
			w.WriteProgram();
		}
	}

	
}

package State;

import Work.Work;

public class EveningState extends State
{

	@Override
	public void WriteProgram(Work w) {
		// TODO Auto-generated method stub
		if(w.isFinish())
		{
			w.setState(new RestState());
			w.WriteProgram();
		}
		else
		{
			if(w.getHour()<21)
			{
				System.out.println("当前时间："+w.getHour()+"加班o，疲惫之极");
			}
			else
			{
				w.setState(new SleepingState());
			}
		}
	}
	

}

package State;

import Work.Work;

public class RestState extends State{

	@Override
	public void WriteProgram(Work w) {
		// TODO Auto-generated method stub
		System.out.println("当前时间："+w.getHour()+"下班回家了");
	}
	
}

package State;

import Work.Work;

public class SleepingState extends State{

	@Override
	public void WriteProgram(Work w) {
		// TODO Auto-generated method stub
		System.out.println("当前时间："+w.getHour()+"不行了，睡着了");
	}

}

写一个work

package Work;

import State.ForenoonState;
import State.State;

public class Work {
	private int hour;
	private boolean finish = false;
	private State state;
	
	public Work()
	{
		state = new ForenoonState();
	}
	
	public void WriteProgram()
	{
		state.WriteProgram(this);
	}
	
	
	
	public int getHour() {
		return hour;
	}

	public void setHour(int hour) {
		this.hour = hour;
	}

	public boolean isFinish() {
		return finish;
	}

	public void setFinish(boolean finish) {
		this.finish = finish;
	}

	public State getState() {
		return state;
	}

	public void setState(State state) {
		this.state = state;
	}
	
}

最后写测试类

import Work.Work;

public class Program {
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Work emergencyProj = new Work();
		emergencyProj.setHour(9);
		emergencyProj.WriteProgram();
		emergencyProj.setHour(10);
		emergencyProj.WriteProgram();
		emergencyProj.setHour(12);
		emergencyProj.WriteProgram();
		emergencyProj.setHour(13);
		emergencyProj.WriteProgram();
		emergencyProj.setHour(14);
		emergencyProj.WriteProgram();
		emergencyProj.setHour(17);
		
		emergencyProj.setFinish(false);
		emergencyProj.WriteProgram();
		emergencyProj.setHour(19);
		emergencyProj.WriteProgram();
		emergencyProj.setHour(22);
		emergencyProj.WriteProgram();
		
	}

}