问题现象

启动出现大量异常，均以 Error create bean ‘xxx’ 开头，且很多类似如下

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'xxxxxservice': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'xxxxhandler': Injection of resource dependencies failed;nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'xxxxDao/Service': Bean with name 'xxxxDao/Service' has been injected into other beans [xxxxxService,xxxxxService,xxxxxService] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using 'getBeanNamesForType' with the 'allowEagerInit' flag turned off, for example.
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:137)
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:407)
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1611)
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:481)
		at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:312)
		at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
		at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:308)
		at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
		at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:756)
		at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
		at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
		at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:443)
		at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:325)
		at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
		at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4763)
		at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5232)
		at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
		at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:755)
		at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:729)
		at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:695)
		at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1775)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
		at java.lang.reflect.Method.invoke(Unknown Source)
		at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:291)
		at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(Unknown Source)
		at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(Unknown Source)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:483)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:431)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
		at java.lang.reflect.Method.invoke(Unknown Source)
		at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:291)
		at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(Unknown Source)
		at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(Unknown Source)
		at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(Unknown Source)
		at javax.management.remote.rmi.RMIConnectionImpl.doOperation(Unknown Source)
		at javax.management.remote.rmi.RMIConnectionImpl.access$300(Unknown Source)
		at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(Unknown Source)
		at java.security.AccessController.doPrivileged(Native Method)
		at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(Unknown Source)
		at javax.management.remote.rmi.RMIConnectionImpl.invoke(Unknown Source)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
		at java.lang.reflect.Method.invoke(Unknown Source)
		at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
		at sun.rmi.transport.Transport$1.run(Unknown Source)
		at sun.rmi.transport.Transport$1.run(Unknown Source)
		at java.security.AccessController.doPrivileged(Native Method)
		at sun.rmi.transport.Transport.serviceCall(Unknown Source)
		at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
		at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
		at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source)
		at java.security.AccessController.doPrivileged(Native Method)
		at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
		at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
		at java.lang.Thread.run(Unknown Source)
..................
..................

且每一行最后末尾都会指出被循环依赖的 bean 名

异常抛出由于是嵌套循环的，所以这一类错误的根本原因往往会置于每一行的最后以及日志的最后
且在日志的最后一处错误会具体写出如下错误，明显说明是循环依赖错误，是在错误日志的最后一部分！会出现类似如下错误：

Bean with name ‘xxxxService/dao’ has been injected into other beans [xxx,xxx,xxx] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using ‘getBeanNamesOfType’ with the ‘allowEagerInit’ flag turned off, for example…

circular reference 即循环依赖

解决方式

根据上面的截图可以知道 xxxxService/dao 在 has been injected into other beans [xxx,xxx,xxx] 即括号中的三个或多个类中被循环依赖，需要到 [xxx,xxx,xxx] 这几个类中去修改

方法一： 在被循环注入的类上再加注解 @Lazy （所在包 import org.springframework.context.annotation.Lazy;）

方法二：重构文件之间的依赖 解开循环依赖