代理和真實(shí)角色本身都要實(shí)現(xiàn)同一個(gè)接口，代理對(duì)象要代理真實(shí)角色，好處是代理可以做很多真實(shí)對(duì)象做不了的其他事情，真實(shí)角色只要專注于做自己的事情。但是代理中還是要調(diào)用真實(shí)角色的方法，真正做事情的還是真實(shí)角色。

public class TestStaticProxy {

    public static void main(String[] args) {
        You you = new You();
        WeddingCompany company = new WeddingCompany(you);
        company.HappyMarry();
    }

}

interface Marry {
    void HappyMarry();
}

//真實(shí)角色去結(jié)婚
class You implements Marry {
    @Override
    public void HappyMarry() {
        System.out.println("新婚快樂");
    }
}

//代理角色，幫助真實(shí)對(duì)象結(jié)婚
class WeddingCompany implements Marry {
    //代理的真實(shí)角色
    private Marry marry;


    public WeddingCompany(Marry marry) {
        this.marry = marry;
    }

    @Override
    public void HappyMarry() {
        before();
        marry.HappyMarry();//真實(shí)對(duì)象去結(jié)婚
        after();


    }

    private void after() {
        System.out.println("收尾款");
    }

    private void before() {
        System.out.println("布置現(xiàn)場(chǎng)");
    }


}

學(xué)習(xí)視頻:https://www.bilibili.com/video/BV1V4411p7EF?p=9