已解决org.springframework.beans.factory.UnsatisfiedDependencyException异常的正确解决方法，亲测有效！！！

た入场券 2023-09-26 19:03 12阅读 0赞

![在这里插入图片描述][a98eec5618e9416f8adf82755122428f.webp_pic_center]

#### 文章目录 ####

*   *  报错问题
     *  解决方法
     *  声明

### 报错问题 ###

粉丝群里面的一个小伙伴敲代码时发生了报错（当时他心里瞬间凉了一大截，跑来找我求助，然后顺利帮助他解决了，顺便记录一下希望可以帮助到更多遇到这个bug不会解决的小伙伴），报错信息如下：

![在这里插入图片描述][8f076594400b491986ca13af92b59b0c.jpeg_pic_center]  
可以理解为依赖失败吧，找不到依赖

部分报错如下：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'pageService': Unsatisfied dependency expressed through field 'pageInfoMepper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'pageInfoMepper' defined in file [D:\project\IDEAProject\demoPage\out\artifacts\WEB-INF\classes\com\liglei\mapper\PageInfoMepper.class]: Cannot resolve reference to bean 'sqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in file [D:\project\IDEAProject\demoPage\out\artifacts\WEB-INF\classes\applicationContext.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse config resource: class path resource [mybatis-config.xml]; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.github.pagehelper.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.github.pagehelper.PageInterceptor
    	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
    	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
    	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
    	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
    	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
    	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:843)
    	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
    	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
    	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:400)
    	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:4643)
    	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5109)
    	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
    	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:743)
    	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:719)
    	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:703)
    	at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1737)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:287)
    	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
    	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
    	at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:457)
    	at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:406)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:287)
    	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
    	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
    	at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)
    	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
    	at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
        .......
        .......

### 解决方法 ###

解决方法如下

![在这里插入图片描述][51977e86019c4440b7d8465001aeac05.png]  
先看看Service层类上的注解有没有加上或者是加错，应给是@Service，注解是否引用了Spring类，不要导成别的包了，看清包的路径。

还有就是如果Service层分成了接口和实现类看看实现类有没有加注解（@Service），看看有没有实现类。

看看配置文件.xml，有没有启动自动扫描Service所在的包

<context:component-scan base-package="com.liglei.service"></context:component-scan>

看看jar包是否下载完整，是否有这个jar包

就是看看下图红色方框内是否有包没导进去，有就按照下面的步骤完成：

File–>Project Structure–>Artifacts–>右键demoPage–>Put into Output Root–>OK  
![在这里插入图片描述][344d6b60911d4fd48d664e1275683adf.png]  
确保以上步骤没问题的，重启一下项目试试~

### 声明 ###

解决方法也是我在网上找的，如有侵权联系我删除

[a98eec5618e9416f8adf82755122428f.webp_pic_center]: https://img-blog.csdnimg.cn/a98eec5618e9416f8adf82755122428f.webp#pic_center
[8f076594400b491986ca13af92b59b0c.jpeg_pic_center]: https://img-blog.csdnimg.cn/8f076594400b491986ca13af92b59b0c.jpeg#pic_center
[51977e86019c4440b7d8465001aeac05.png]: https://img-blog.csdnimg.cn/51977e86019c4440b7d8465001aeac05.png
[344d6b60911d4fd48d664e1275683adf.png]: https://img-blog.csdnimg.cn/344d6b60911d4fd48d664e1275683adf.png