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建造者模式

建造者模式（Builder Pattern）允许你逐步构建复杂的对象。这种模式将对象的构造过程与其表示分离，使得相同的构造过程可以创建不同的表示。建造者模式特别适用于需要创建具有多个部件或复杂配置的对象时。

使用建造者模式构造对象并完成链式调用：

需要创建的对象：

@Data
@ToString
public class Phone {String cpu;String mem;String disk;String camera;
}

抽象建造者类及其实现子类：

public abstract class AbstractPhoneBuilder {Phone phone;public abstract AbstractPhoneBuilder customCpu(String cpu);public abstract AbstractPhoneBuilder customMem(String mem);public abstract AbstractPhoneBuilder customDisk(String disk);public abstract AbstractPhoneBuilder customCamera(String camera);public Phone getPhone(){return this.phone;}
}

public class PhoneBuilder extends AbstractPhoneBuilder{public PhoneBuilder() {this.phone = new Phone();}@Overridepublic AbstractPhoneBuilder customCpu(String cpu) {phone.setCpu(cpu);return this;}@Overridepublic AbstractPhoneBuilder customMem(String mem) {phone.setMem(mem);return this;}@Overridepublic AbstractPhoneBuilder customDisk(String disk) {phone.setDisk(disk);return this;}@Overridepublic AbstractPhoneBuilder customCamera(String camera) {phone.setCamera(camera);return this;}
}

测试：

public class Main {public static void main(String[] args) {PhoneBuilder builder = new PhoneBuilder();Phone phone = builder.customCpu("晓龙999").customMem("32g").customDisk("1tb").customCamera("1亿").getPhone();System.out.println(phone);}
}