重新創(chuàng)建了一個項目，代碼結(jié)構(gòu)有所改變，結(jié)果在啟動服務(wù)時，一直報如下錯誤

嚴(yán)重:

Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'car1UserInfoService': Unsatisfied dependency expressed through field 'mapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.bonade.core.base.BaseMapper<com.bonade.system.car1user.model.Car1UserInfo>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:587)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:373)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1344)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:578)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:409)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:291)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
at java.util.concurrent.FutureTask.run(FutureTask.java)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.bonade.core.base.BaseMapper<com.bonade.system.car1user.model.Car1UserInfo>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1509)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:584)
... 25 more

思考過程：

1.mybatis jar包增加ok

2.mybatis的xml配置，已經(jīng)配置

3.其他正常的model類，放過來依然報錯，證明不是model類的問題，在裝載model時正常

4.根據(jù)報錯信息：

Error creating bean with name ‘car1UserInfoService': Unsatisfied dependency expressed through field ‘mapper'

找到對應(yīng)的代碼

@Autowired
protected BaseMapper<T> mapper;

發(fā)現(xiàn)是裝載BaseMapper時報錯，那么猜測是BaseMapper沒有被加載到spring容器。

此時查看mybatis.xml配置文件

再看看mapper文件路徑：

發(fā)現(xiàn)配置文件和它對應(yīng)不上，所以掃描不到mapper類，猜測是這個原因?qū)е聢箦e。所以修改了下

結(jié)果啟動正常。

但是這樣子，對于工程來說，mapper文件的層級就固定死了，所以可以這樣子配置：

這里面涉及到一個語法：

1.？代表匹配任意一個字符，* 代表匹配0個或多個任意字符 ，**/匹配任意多個目錄

2.對于多個路徑，可以用，分割

備注：

改成第二種方式也能解決問題，但是發(fā)現(xiàn)啟動的速度減慢了，因為掃描的包增多了，需要的時間也延長了。

所以如果能統(tǒng)一一種規(guī)范，來進(jìn)行開發(fā)的話，還是用第一種方式。

以上這篇關(guān)于mybatis mapper類注入失敗的解決方案就是小編分享給大家的全部內(nèi)容了，希望能給大家一個參考，也希望大家多多支持腳本之家。

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