SpringBoots这个显示错误是哪个地方有问题，刚学照不出来

[小小的入门菜鸟]

警告: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'key' defined in class path resource [applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [cn.edu.qztc.software20.KeyBoard]: No default constructor found; nested exception is java.lang.NoSuchMethodException: cn.edu.qztc.software20.KeyBoard.<init>()
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'key' defined in class path resource [applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [cn.edu.qztc.software20.KeyBoard]: No default constructor found; nested exception is java.lang.NoSuchMethodException: cn.edu.qztc.software20.KeyBoard.<init>()
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1155)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at cn.edu.qztc.software20.TestIOC.main(TestIOC.java:12)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [cn.edu.qztc.software20.KeyBoard]: No default constructor found; nested exception is java.lang.NoSuchMethodException: cn.edu.qztc.software20.KeyBoard.<init>()
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:85)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1147)
... 13 more
Caused by: java.lang.NoSuchMethodException: cn.edu.qztc.software20.KeyBoard.<init>()
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.getDeclaredConstructor(Unknown Source)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80)
... 14 more

[KeepSayingNo]

你看看applicationContext.xml是不是放在resource的目录下，感觉是这个文件不在classpath下面，导致spring容器无法创建bean

[fantisty_L]

id=key 的那个bean没有默认构造方法

[小小的入门菜鸟]

引用 1 楼 KeepSayingNo 的回复:

你看看applicationContext.xml是不是放在resource的目录下，感觉是这个文件不在classpath下面，导致spring容器无法创建bean

application.xml放到classpath下或者TestIoc的application要填写完整路径对吧