【笔记】简单学习设计模式

文章目录

• • • 抽象工厂

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另外可参考：设计模式的UML图

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抽象工厂

代码语言：javascript复制

// 只定义了需要实现的内容
interface HtmlDoc {
    void print();
}
// 只定义了需要实现的内容
interface WordDoc {
    void print();
}

// 工厂是接口的
interface AbstractFactory {
    HtmlDoc createHtml(String md);
    WordDoc createWord(String md);
    static AbstractFactory createFactory(String name) {
        if ("fast".equalsIgnoreCase(name)) {
            return new FastFactory();
        }else if ("good".equalsIgnoreCase(name)) {
            return new GoodFactory();
        }else {
            throw new IllegalArgumentException();
        }
    }
}

// 具体的接口实现类
class FastHtmlDoc implements HtmlDoc {
    String md;
    public FastHtmlDoc(String md) {this.md = md;}
    @Override
    public void print() {
        System.out.println(md);
    }
}
// 具体的接口实现类
class FastWordDoc implements WordDoc {
    String md;
    public FastWordDoc(String md) {this.md = md;}
    @Override
    public void print() {
        System.out.println(md);
    }
}
// Fast厂家提供的实际的工厂来生产这两种产品
class FastFactory implements AbstractFactory {
    @Override
    public HtmlDoc createHtml(String md) {
        return new FastHtmlDoc(md);
    }
    @Override
    public WordDoc createWord(String md) {
        return new FastWordDoc(md);
    }
}
// Good厂家提供的实际的工厂来生产这两种产品
class GoodFactory implements AbstractFactory {
    @Override
    public HtmlDoc createHtml(String md) {
        return new FastHtmlDoc(md);
    }
    @Override
    public WordDoc createWord(String md) {
        return new FastWordDoc(md);
    }
}

public class Main {
    public static void main(String[] args) throws InterruptedException {
        AbstractFactory factory1 = AbstractFactory.createFactory("fast");
        HtmlDoc html1 = factory1.createHtml("fast html");
        html1.print();
        WordDoc word1 = factory1.createWord("fast word");
        word1.print();

        AbstractFactory factory2 = AbstractFactory.createFactory("good");
        HtmlDoc html2 = factory2.createHtml("good html");
        html2.print();
        WordDoc word2 = factory2.createWord("good word");
        word2.print();
    }
}

uml 设计模式

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