设计模式之生成器模式

￡神魔★判官ぃ 2022-08-19 14:10 175阅读 0赞

**将一个复杂对象的创建和它的表示分离，使得同样的创建过程可以有不同的表示。**

应用场景：一水杯工厂要生产各式各样的水杯，无论杯子是神马造型，但都包括绳子，帽子和杯体。以此模型创建各种类型的杯子。

![这里写图片描述][20160119102247921]

**类图**  
![这里写图片描述][20160119102407329]

**cup类**

public class Cup {
    
        private String string;    //绳子
        private String cap;       //帽子
        private String cupBody;   //杯体
    
        public void setString(String string) {
            this.string = string;
        }
        public void setCap(String cap) {
            this.cap = cap;
        }
        public void setCupBody(String cupBody) {
            this.cupBody = cupBody;
        }
    
        public void show() {
            System.out.println("杯子生产完毕");
        }
    
    }

**Builder类**

public abstract class  Builder {
    
    protected Cup cup = new Cup();
    
    public abstract void buildString();
    
    public abstract void buildCap();
    
    public abstract void buildCupBody();
    
    public  Cup getResult() {
    return cup;
    }
    
    }

**ClassCup类**

public class ClassCup extends Builder { 
    
        @Override
        public void buildString() {
            cup.setString("生产绳子...");
            System.out.println("生产绳子...");
        }
    
        @Override
        public void buildCap() {
            cup.setCap("生产帽子...");
            System.out.println("生产帽子...");
        }
    
        @Override
        public void buildCupBody() {
            cup.setCupBody("生产杯体...");
            System.out.println("生产杯体...");
        }
    
    
    }

**Director类**

public class Director {
    
        private Builder builder;
    
        public Director(Builder builder) {
            this.builder = builder;
        }
    
        public void create() {
            builder.buildString();
            builder.buildCap();
            builder.buildCupBody();
            builder.getResult().show();
        }
    
        public static void main(String[] args) {
            Director d = new Director(new ClassCup());
            d.create();
        }
    
    }

**运行结果：**  
![这里写图片描述][20160119102716506]

[20160119102247921]: /images/20220731/25216dbb2f5348dc8f1e8ca96adf1e28.png
[20160119102407329]: /images/20220731/11c9de27900942eba085639873bdd458.png
[20160119102716506]: /images/20220731/890270d7dee64bf0b9bbe683abc27ea5.png