Spring报错：org.springframework.beans.factory.NoUniqueBeanDefinitionException

org.springframework.beans.factory.NoUniqueBeanDefinitionException:
No qualifying bean of type [com.panpan.beans.Book] is defined: expected single matching bean but found 2: book01,book02

 at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:312)

 at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:985)

 at com.panpan.test.IOCTest.test2(IOCTest.java:37)

 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

如果按照类型获取Spring组件（bean），有多个类型相同的bean都会报错，换成id获取即可，或者不要有多个类型的bean