JAVA设计模式（结构型）------ 适配器模式-优快云博客

本文链接：https://blog.youkuaiyun.com/wjh874024173/article/details/95317885

博客介绍了适配器模式，它可将一个类的接口转换成客户期望的另一个接口，让原本因接口不兼容而无法协同工作的类能够一起工作，是信息技术领域重要的设计模式。

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将一个类的接口转换成客户希望的另外一个接口。适配器模式使得原本由于接口不兼容而不能一起工作的那些类可以一起工作。

public class Adapter_Main {

    public static void main(String[] args) {
        DispatcherServlet dispatcherServlet = new DispatcherServlet();
        dispatcherServlet.doDispatcher(new MethodController());
    }
}

interface Controller{}
class MethodController implements Controller{
    void doMethod(){
        System.out.println("MethodController...doMethod...");
    }
}
class MultiController implements Controller{
    void doMulti(){
        System.out.println("MethodController...doMethod...");
    }
}
interface Adapter{
    boolean support(Object handler);
    void handler(Object handler);
}
class MethodControllerAdapter implements Adapter{
    @Override
    public boolean support(Object handler) {
        return handler instanceof MethodController;
    }
    @Override
    public void handler(Object handler) {
        System.out.println("MethodControllerAdapter...handler...start...");
        ((MethodController)handler).doMethod();
        System.out.println("MethodControllerAdapter...handler...end...");
    }
}
class MultiControllerAdapter implements Adapter{
    @Override
    public boolean support(Object handler) {
        return handler instanceof MultiController;
    }
    @Override
    public void handler(Object handler) {
        System.out.println("MultiControllerAdapter...handler...start...");
        ((MultiController)handler).doMulti();
        System.out.println("MultiControllerAdapter...handler...end...");
    }
}
class DispatcherServlet{
    private List<Adapter> adapters = Lists.newArrayList();
    public DispatcherServlet(){
        adapters.add(new MethodControllerAdapter());
        adapters.add(new MultiControllerAdapter());
    }
    public void doDispatcher(Object handler){
        System.out.println("doDispatcher...");
        Iterator<Adapter> iterator = adapters.iterator();
        do {
            Adapter next = iterator.next();
            if (next.support(handler)){
                next.handler(handler);
                break;
            }
        } while (iterator.hasNext());
    }
}