Spring IoC 的实现机制？

Spring 中的 IoC 的实现原理就是工厂模式加反射机制。

示例：

interface Fruit {

public abstract void eat();

}

class Apple implements Fruit {

public void eat(){

System.out.println("Apple");

}

}

class Orange implements Fruit {

public void eat(){

System.out.println("Orange");

}

}

class Factory {

public static Fruit getInstance(String ClassName) {

Fruit f=null;

try {

f=(Fruit)Class.forName(ClassName).newInstance();

} catch (Exception e) {

e.printStackTrace();

}

return f;

}

}

class Client {

public static void main(String[] a) {

Fruit f=Factory.getInstance("io.github.dunwu.spring.Apple");

if(f!=null){

f.eat();

}

}

}