8.5. 从 factory bean 创建 Bean

	<bean name="myBean" type="com.acme.MyBean"
          factoryBean="com.acme.MyHelper" factoryMethod="createMyBean">
        <constructors>
          <constructor index="0" value="true"/>
          <constructor index="1" value="Hello World"/>
        </constructors>
	</bean>

public class MyHelper {

    public static MyBean createMyBean(boolean important, String message) {
        MyBean answer = ...
        // create and configure the bean
        return answer;
    }
}