静态工厂和实例工厂
静态工厂：工厂初始化之前，工厂中的类已经被实例化放在工厂容器中
public class StaticFactory {
public static void main(String[] args) {
Object bean = StaticFactory.getBean();
}
public static Object getBean(){
return new Object();
}
}实例工厂：工厂在构造方法初始化时,会将类进行实例化放在工厂中
class InstanceFactory {
public static void main(String[] args) {
InstanceFactory factory = new InstanceFactory();
Object bean = factory.getBean();
}
public Object getBean(){
return new Object();
}
}