java设计模式-模版方法

模版方法：

在抽象类中定义任务执行顺序，把每一步的实现延迟到子类中

/**
 * 
 * @author ietown
 *
 */
public abstract class AbstractGoToWork {

    protected abstract void weekUp();
    
    protected abstract void eatBreakfast();
    
    protected abstract void gotoBusStation();
    
    protected abstract void cometoCompany();
    
    protected boolean isGotoBusStation() {
        return true;
    }
    
    public void gotoWork() {
        this.weekUp();
        this.eatBreakfast();
        if(this.isGotoBusStation()) {
            this.gotoBusStation();
        }
        this.cometoCompany();
    }
}

/**
 * 
 * @author ietown
 *
 */
public class XiaoMingGoToWork extends AbstractGoToWork{

    @Override
    protected void weekUp() {
        System.out.println("起床");
        
    }

    @Override
    protected void eatBreakfast() {
        System.out.println("吃早饭");
        
    }

    @Override
    protected void gotoBusStation() {
        System.out.println("去公交车站");
        
    }

    @Override
    protected void cometoCompany() {
        System.out.println("到公司");
        
    }

}

/**
 * 
 * @author ietown
 *
 */
public class LaoShiGoToWork extends AbstractGoToWork{

    private boolean isBusStation = true;
    
    @Override
    protected void weekUp() {
        System.out.println("起床");
        
    }

    @Override
    protected void eatBreakfast() {
        System.out.println("吃早饭");
        
    }

    /**
     * 老师住学校里，不用去公交车站坐车
     */
    @Override
    protected void gotoBusStation() {
        System.out.println("去公交车站");
        
    }

    @Override
    protected void cometoCompany() {
        System.out.println("到教学楼");
        
    }

    @Override
    protected boolean isGotoBusStation() {
        return this.isBusStation;
    }
    
    /**
     * 钩子方法，设置抽象类中的判断返回值
     * @param isBusStation
     */
    public void setIsBusStation(boolean isBusStation) {
        this.isBusStation = isBusStation;
    }

}

/**
 * 
 * @author ietown
 *
 */
public class Main {

    public static void main(String[] args) {
        XiaoMingGoToWork xm = new XiaoMingGoToWork();
        xm.gotoWork();
        
        System.out.println("---分割线---");
        
        LaoShiGoToWork ls = new LaoShiGoToWork();
        ls.setIsBusStation(false);
        ls.gotoWork();
    }
}