实例：使用ClassFactory类创建一个Class类

public  classClass{

    int num;

public Class(intnum)

{

        this.num=num;

}

}

public class ClassFactory{

     public static Class getClass(int num)

{

System.out.println(num);

   Returnnew Class(num);

}

}

applicationContext.xml

<bean id =”class” class=”ClassFactory”factory-method=”getClass”>

    <constructor-arg value=”50”></constructor>

</bean>

Main方法：

public static void main(String[] arg)

{  ApplicationContextac=new ClassPathXMLApplicationContext(“applicationContext.xml”);

Class cl=ac.getBean(“class”,Class.class);//就可以得到我们的Class实例

}