BeanNotOfRequiredTypeException:Bean named 'XXXX' is expected to be of type 'XXX' but was actually of type 'com.sun.proxy.$Proxy211'

　　  直接说结论，前提是在服务实现层启用了@Transactional(rollbackFor = Exception.class)注解，然后controller层注入的服务应该是接口，但是不知道哪个傻吊注入了实现。详细看后面。

　　  今天测试项目的时候一直报错，找这个错误花费了两三个小时，错误来源于粗心大意，注入的接口弄错了，但不是我弄错了，是公司的其他同事，协作开发。

　　由于昨天开发、测试一切正常，但是我新写的代码，启动就报错，最开始我百度，基本都是告诉我注入bean错误，name有问题，重名等等，但是我仔细核查都没问题。

　　后来我一点点的添加自己的代码，测试，发现当我的服务层Server方法加上@Transactional(rollbackFor = Exception.class)注解，启动就报RT错误，这我纳闷了，然后慢慢看注入bean的name看是否重名，没有，编译也不报错，但我看到这个的时候，简直爆炸。如下图。

　　

　　

　　当时就想骂人了，谁这么注解的，浪费我时间，难怪会报错，至于深层原因，技术水平时间有限，我也不知道Orz。

　　如果有类似错误，但是不是bean的name等错误，可以看看是不是这个原因。

　　附完整错误代码：

六月 23, 2019 6:55:08 下午 org.apache.catalina.core.ApplicationContext log
严重: StandardWrapper.Throwable
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'noticeController': Unsatisfied dependency expressed through field 'nts'; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'noticeService' is expected to be of type 'service.NoticeService' but was actually of type 'com.sun.proxy.$Proxy211'
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:171)
	at javax.servlet.GenericServlet.init(GenericServlet.java:158)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1031)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4901)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5188)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'noticeService' is expected to be of type 'service.NoticeService' but was actually of type 'com.sun.proxy.$Proxy211'
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.checkBeanNotOfRequiredType(DefaultListableBeanFactory.java:1510)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.checkBeanNotOfRequiredType(DefaultListableBeanFactory.java:1517)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1489)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
	... 31 more

六月 23, 2019 6:55:09 下午 org.apache.catalina.core.StandardContext loadOnStartup
严重: Servlet [spring] in web application [/mainWeb] threw load() exception
org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'noticeService' is expected to be of type '.service.NoticeService' but was actually of type 'com.sun.proxy.$Proxy211'
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.checkBeanNotOfRequiredType(DefaultListableBeanFactory.java:1510)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.checkBeanNotOfRequiredType(DefaultListableBeanFactory.java:1517)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1489)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585)
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
	at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
	at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
	at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
	at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:171)
	at javax.servlet.GenericServlet.init(GenericServlet.java:158)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1231)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1031)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4901)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5188)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)