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  • 设计模式——适配器模式

    适配器模式也叫做包装模式;就是把内部结构包装(适配)成用户期待的格式,使得可以兼容使用

    通过继承方式使用适配器模式

    /**
     * @author maikec
     * @date 2019/5/9
     */
    public interface Print {
        /**
         * 打印带括号的消息
         */
        void printParen();
    
        /**
         * 打印带*号的消息
         */
        void printAster();
    }
    
    /**
     * 实际使用中的类
     * @author maikec
     * @date 2019/5/9
     */
    public class Banner {
        private final String msg;
        public Banner(String msg){
            this.msg = msg;
        }
        public void showWithParen(){
            System.out.println( "(" + msg + ")" );
        }
        public void showWithAster(){
            System.out.println( "*" + msg + "*" );
        }
    }
    
    /**
     * @author maikec
     * @date 2019/5/9
     */
    public class PrintBannerAdapter extends Banner implements Print {
    
        public PrintBannerAdapter(String msg) {
            super( msg );
        }
    
        @Override
        public void printParen() {
            showWithParen();
        }
    
        @Override
        public void printAster() {
            showWithAster();
        }
    }
    
    /**
     * @author maikec
     * @date 2019/5/9
     */
    public class AdapterExtendDemo {
        public static void main(String[] args) {
            Print print = new PrintBannerAdapter( "hello adapter" );
            print.printAster(  );
            print.printParen();
        }
    }

    通过引用使用适配器模式

    /**
     * 需求
     * @author maikec
     * @date 2019/5/9
     */
    public abstract class Print {
        /**
         * 打印带括号的消息
         */
        public abstract void printParen();
    
        /**
         * 打印带*号的消息
         */
        public abstract void printAster();
    
        public void i(){
    
        }
    }
    
    /**
     * 实际使用中的类
     * @author maikec
     * @date 2019/5/9
     */
    public class Banner {
        private final String msg;
        public Banner(String msg){
            this.msg = msg;
        }
        public void showWithParen(){
            System.out.println( "(" + msg + ")" );
        }
        public void showWithAster(){
            System.out.println( "*" + msg + "*" );
        }
    }
    
    /**
     * @author maikec
     * @date 2019/5/9
     */
    public class PrintBannerAdapter extends Print {
        private Banner banner;
    
        public PrintBannerAdapter(Banner banner){
            this.banner = banner;
        }
        @Override
        public void printParen() {
            banner.showWithParen();
        }
    
        @Override
        public void printAster() {
            banner.showWithAster();
        }
    }
    
    /**
     * @author maikec
     * @date 2019/5/9
     */
    public class AdapterReferenceDemo {
        public static void main(String[] args) {
            Print print = new PrintBannerAdapter( new Banner( "Hello Adapter" ) );
            print.printAster();
            print.printParen();
        }
    }

    附录

    zh.wikipedia.org/wiki/适配器模式 维基关于适配器模式
    github.com/maikec/patt… 个人GitHub设计模式案例

    声明

    引用该文档请注明出处

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  • 原文地址:https://www.cnblogs.com/imaikce/p/10873034.html
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