设计模式-构造器模式

类图

 

实现代码

Director

?

1 2 3 4 5 6 7 8 9 10

class Director {     private Builder builder;     public Director(Builder builder) {          this.builder = builder;     }     public void construct() {         builder.buildPartA();         builder.buildPartB();     } }

Builder.class

?

1 2 3 4 5

interface Builder {     void buildPartA();     void buildPartB();     Product getResult(); }

BuilderA.class

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

class BuilderA implements Builder {     private Product productA;     public BuilderA(Product productA) {         this.productA = productA;     }       public void buildPartA() {         this.productA.setHead("型号1");     }       public void buildPartB() {         this.productA.setBody("A工产生产");     }       public Product getResult() {         return productA;     } }

Product.class

?

1 2 3 4 5 6

class Product {     private String head;     private String body;       get set.. }

Test.class

?

1 2 3 4 5 6 7 8

public class TestBuilder {     public static void main(String[] args) {         BuilderA builderA = new BuilderA(new Product());         Director director = new Director(builderA);         director.construct();         System.out.println(builderA.getResult());     } }