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：

java

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("com.xxx.xxx.Apple");
    if(f!=null){
      f.eat();
    } 
  }
}

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Spring IoC 的实现机制 #

Spring IoC 的实现机制