建造者模式

建造者模式的思想.就是我需要一个对象,我不用创建,我去找建筑商,然后我告诉建筑商我要的对象都有哪些属性,

建筑商它也不创建对象,建筑商去找一个或一些能创建和赋值的工人来干,由建筑商负责指挥工人先怎么样,再怎么样,最后将对象给我

实体类

package ink.yql.builder;
// 需要被创建的类
public class RealEstate {private  Integer floorNumber;private String name;public Integer getFloorNumber() {return floorNumber;}public void setFloorNumber(Integer floorNumber) {this.floorNumber = floorNumber;}public String getName() {return name;}public void setName(String name) {this.name = name;}public RealEstate(){}@Overridepublic String toString() {return "RealEstate{" +"floorNumber=" + floorNumber +", name='" + name + '\'' +'}';}
}

建造者(建筑商)

package ink.yql.builder;
// 建造者没有创建对象和赋值的能力,单可以指挥工人来创建对象,对属性赋值
public class Builder {private Worker worker;// 有人来找建筑商,由建筑商去找工人public Builder(){worker = new Worker();}// 建筑商指挥工人创建的流程RealEstate builder(int foolNumber,String name){RealEstate realEstate = worker.newRealEstate();worker.setFloorNumber(foolNumber);worker.setName(name);return realEstate;}
}

工人

package ink.yql.builder;
// 工人类有创建对象和对象赋值的能力
public class Worker {private RealEstate rea;RealEstate newRealEstate(){rea = new RealEstate();return rea;}void setFloorNumber(int floorNumber){rea.setFloorNumber(floorNumber);}void setName(String name){rea.setName(name);}
}

测试

package ink.yql.builder;public class Test04 {public static void main(String[] args) {// 我去找建筑商Builder builder = new Builder();// 由建筑商创建好对象,赋值好,然后给我RealEstate estate = builder.builder(26, "恒大");System.out.println(estate);}
}