大话设计模式之工厂方法模式读后感

 1 package com.dzf.designtest;
 2 
 3 /**
 4  * <desc>
 5  *     工厂方法：定义一个创建对象的接口，让子类来决定实例化哪一个类，工厂方法使一个类的实例延迟到子类。
 6  * </desc>
 7  * @author dingzf
 8  * @date 2018/4/1
 9  * @time 21:42
10  */
11 public class FactoryMethodDmeo {
12     //客户端
13     public static void main(String[] args) {
14         ProductFactory productFactory = new ProductImplOneFactory();
15         Product product = productFactory.getInstance();
16         product.operation();
17     }
18 }
19 
20 abstract class Product {
21     public abstract void operation();
22 }
23 
24 class ProductImplOne extends Product {
25     @Override
26     public void operation() {
27         System.out.println("我是产品1号");
28     }
29 }
30 
31 class ProductImplTwo extends Product {
32     @Override
33     public void operation() {
34         System.out.println("我是产品2号");
35     }
36 }
37 
38 interface ProductFactory {
39     //定义创建对象的接口，再子类中去实例化目标对像
40     public Product getInstance();
41 }
42 class ProductImplOneFactory implements ProductFactory {
43     //子类实例化目标对象
44     @Override
45     public Product getInstance() {
46         return new ProductImplOne();
47      }
48 }
49 class ProductImplTwoFactory implements ProductFactory{
50     //子类实例化目标对象
51     @Override
52     public Product getInstance() {
53         return new ProductImplTwo();
54     }
55 }