模板模式

1.模板模式简介

在模板模式(Template Pattern)中,一个抽象类公开定义了执行它的方法的方式/模板。它的子类可以按需要重写方法实现,但调用将以抽象
类中定义的方式进行。这种类型的设计模式属于行为型模式。定义框架,但允许修改细节。

应用实例:例如在造房子的时候,地基、走线、水管都一样,只有在建筑的后期才有加壁橱加栅栏等差异。
注意事项:一般模板方法都加上 final 关键词。

 

2.示例Demo

abstract class Game {
    abstract public void play_initialize();
    abstract public void int_playing();
    abstract public void play_finish();
    /*使用final关键字限制子类重写该方法*/
    public final void play() {
        play_initialize();
        int_playing();
        play_finish();
    }
}

class Football extends Game {
    public void play_initialize() {
        System.out.println("Begin play football");
    }
    public void int_playing() {
        System.out.println("In playing football");
    }
    public void play_finish() {
        System.out.println("After play football");
    }
}

class Basketball extends Game {
    public void play_initialize() {
        System.out.println("Begin play Basketball");
    }
    public void int_playing() {
        System.out.println("In playing Basketball");
    }
    public void play_finish() {
        System.out.println("After play Basketball");
    }
}

public class TemplatePatternDemo {
    public static void main(String args[]) {
        Game football = new Football();
        football.play();

        Game basketball = new Basketball();
        basketball.play();
    }
}

 

 

参考:http://www.runoob.com/design-pattern/template-pattern.html

 

posted on 2019-04-20 20:23  Hello-World3  阅读(104)  评论(0编辑  收藏  举报

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