代理模式

直接上代码

package com.example.demo.proxy;

/**
 * @projectName: demo
 * @package: com.example.demo.proxy
 * @className: StaticProxy
 * @author: 
 * @description: 结婚代理
 * @date: 2021/11/26 16:01
 */
public class StaticProxy {
    public static void main(String[] args) {
        Person person = new Person();
        Company company = new Company(person);
        company.HappyMarry();
    }
}

//结婚
interface Marry {
    void HappyMarry();
}

// 真实角色结婚
class Person implements Marry {

    @Override
    public void HappyMarry() {
        System.out.println("我要去结婚！");
    }
}

// 婚庆公司
class Company implements Marry {
    private Marry target;

    public Company(Marry target) {
        this.target = target;
    }

    @Override
    public void HappyMarry() {
        before();
        this.target.HappyMarry();
        after();
    }

    private void before() {
        System.out.println("结婚前帮忙婚礼现场！");
    }

    private void after() {
        System.out.println("结婚之后拿钱！");
    }
}