建造者模式的运用

/**
 * 产品: Bike
 */
public class Bike {
    private String frame;//车架
    private String seat;//车座
    public String getFrame() {
        return frame;
    }
    public void setFrame(String frame) {
        this.frame = frame;
    }
    public String getSeat() {
        return seat;
    }
    public void setSeat(String seat) {
        this.seat = seat;
    }
}
/**
 * 抽象建造者: Builder
 */
public abstract class Builder {
    //声明Bike类型的变量，并进行赋值
    protected Bike bike = new Bike();
    public abstract void buildFrame();
    public abstract void buildSeat();
    //构建自行车的方法
    public abstract Bike createBike();
}
/**
 * 具体的构建者，用来构建摩拜单车对象
 */
public class MobileBuilder extends Builder {
    public void buildFrame() {
        bike.setFrame("碳纤维车架");
    }
    public void buildSeat() {
        bike.setSeat("真皮车座");
    }
    public Bike createBike() {
        return bike;
    }
}
/**
 * ofo单车构建者，用来构建ofo单车
 */
public class OfoBuilder extends Builder {
    public void buildFrame() {
        bike.setFrame("铝合金车架");
    }
    public void buildSeat() {
        bike.setSeat("橡胶车座");
    }
    public Bike createBike() {
        return bike;
    }
}
/**
 * 指挥者
 */
public class Director {
    //声明builder类型的变量
    private Builder builder;
    public Director(Builder builder) {
        this.builder = builder;
    }
    //组装自行车的功能
    public Bike construct() {
        builder.buildFrame();
        builder.buildSeat();
        return builder.createBike();
    }
}
/**
 * 客户: Client
 */
public class Client {
    public static void main(String[] args) {
        //创建指挥者对象
        Director director = new Director(new MobileBuilder());
        //让指挥者只会组装自行车
        Bike bike = director.construct();
        System.out.println(bike.getFrame());
        System.out.println(bike.getSeat());
    }
}

/**
 * Phone的javaBean
 */
public class Phone {
    private String cpu;
    private String screen;
    private String memory;
    private String mainboard;
    public Phone(String cpu, String screen, String memory, String mainboard) {
        this.cpu = cpu;
        this.screen = screen;
        this.memory = memory;
        this.mainboard = mainboard;
    }
    public String getCpu() {
        return cpu;
    }
    public void setCpu(String cpu) {
        this.cpu = cpu;
    }
    public String getScreen() {
        return screen;
    }
    public void setScreen(String screen) {
        this.screen = screen;
    }
    public String getMemory() {
        return memory;
    }
    public void setMemory(String memory) {
        this.memory = memory;
    }
    public String getMainboard() {
        return mainboard;
    }
    public void setMainboard(String mainboard) {
        this.mainboard = mainboard;
    }
    @Override
    public String toString() {
        return "Phone{" +
                "cpu='" + cpu + '\'' +
                ", screen='" + screen + '\'' +
                ", memory='" + memory + '\'' +
                ", mainboard='" + mainboard + '\'' +
                '}';
    }
}
/**
 * 客户: Client
 */
public class Client {
    public static void main(String[] args) {
        //构建Phone对象
        Phone phone = new Phone("intel","三星屏幕","金士顿","华硕");
        System.out.println(phone);
    }
}

/**
 * Phone的JavaBean
 */
public class Phone{
    private String cpu; // 中央处理器
    private String screen; // 屏幕
    private String memory; // 存储器
    private String mainboard; // 主板
    // 构造私有的构造方法防止外界直接声明有参对象
    private Phone(Builder builder){
        this.cpu = builder.cpu;
        this.screen = builder.screen;
        this.memory = builder.memory;
        this.mainboard = builder.mainboard;
    }
    // 构建静态内部类Builder
    public static final class Builder {
        private String cpu;
        private String screen;
        private String memory;
        private String mainboard;
        public Builder cpu(String cpu) {
            this.cpu = cpu;
            return this;
        }
        public Builder screen(String screen) {
            this.screen = screen;
            return this;
        }
        public Builder memory(String memory) {
            this.memory = memory;
            return this;
        }
        public Builder mainboard(String mainboard) {
            this.mainboard = mainboard;
            return this;
        }
        // 使用构建者创建Phone对象
        public Phone build() {
            return new Phone(this);
        }
    }
    @Override
    public String toString() {
        return "Phone{" +
                "cpu='" + cpu + '\'' +
                ", screen='" + screen + '\'' +
                ", memory='" + memory + '\'' +
                ", mainboard='" + mainboard + '\'' +
                '}';
    }
}
/**
 * 客户: Client
 */
public class Client {
    public static void main(String[] args) {
        // 创建一个Phone对象，通过构建者对象获取Phone对象
        Phone phone = new Phone.Builder()
                .cpu("天玑1000+ 八核")
                .screen("华为屏幕")
                .memory("金士顿内存条")
                .mainboard("华硕ROG MAXIMUS Z790 EXTREME")
                .build();
        System.out.println(phone);
    }
}