简单工程模式

/**
 * 创建在 2020/6/15 18:31
 */
public interface Phone {

    /**
     * 描述手机信息
     */
    public void info();
}

public class XiaoMiPhone implements Phone{
    @Override
    public void info() {
        System.out.println("我是小米手机");
    }
}

public class OppoPhone implements Phone {
    @Override
    public void info() {
        System.out.println("我是oppo手机");
    }
}

public class HuaWeiPhone implements Phone {
    @Override
    public void info() {
        System.out.println("我是华为手机拉");
    }
}

public enum PhoneType {
    XIAOMI(1),HUAWEI(2),OPPO(3);

    private int code;

    PhoneType(int code) {
        this.code = code;
    }
}

public class BasePhoneFactory implements PhoneFactory {
    @Override
    public Phone produce(PhoneType type) {
        switch (type){
            case XIAOMI:
                return new XiaoMiPhone();
            case OPPO:
                return new OppoPhone();
            case HUAWEI:
                return new HuaWeiPhone();
            default:
                throw new AssertionError("没有该类型的手机");
        }
    }

    public static void main(String[] args) {
        PhoneFactory phoneFactory = new BasePhoneFactory();
        Phone phone = phoneFactory.produce(PhoneType.XIAOMI);
        phone.info();
    }
}