SpringIoc 和 工厂模式(反射实现)

一、先演示 “简单工厂”：

 1 package org;
 2 
 3 interface Fruit {
 4     public void eat();
 5 }
 6 
 7 class Apple implements Fruit {
 8     public void eat() {
 9         System.out.println("吃苹果。");
10     }
11 }
12 
13 class Orange implements Fruit {
14     public void eat() {
15         System.out.println("吃橘子");
16     }
17 }
18 
19 class Factory { // 工厂类
20     public static Fruit getInstance(String className) {
21         Fruit f = null;
22         if (className.equals("apple")) {
23             f = new Apple();
24         }
25         if (className.endsWith("orange")) {
26             f = new Orange();
27         }
28         return f;
29     }
30 }
31 
32 public class FactoryDemo {
33     public static void main(String args[]) {
34         Fruit f = Factory.getInstance("apple");
35         f.eat();
36     }
37 }

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