使用Spring框架开发会遇到的所有异常及解决方案(持续更)_no qualifying bean of type 'org.springframework.we

①org.springframework.beans.factory.NoUniqueBeanDefinitionException

Exception in thread “main” org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [com.sms.spring.pojo.Person] is defined: expected single matching bean but found 2: person1,person2
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:312)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:985)
at com.sms.spring.test.TestPerson.main(TestPerson.java:22)

异常原因：Spring的配置文件中配置了一个类的多个bean，而通过bean获取对象的时候使用的getBean(Class)方法，程序不知道获取这个类的哪个bean，因此报异常。

解决方案：如果在配置文件中配置了多个bean，则获取对象的时候避免使用getBean（Class< T >）方法，使用getBean（String name）方法通过id选择较为合理

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②Caused by: java.lang.NoSuchMethodException

Caused by: java.lang.NoSuchMethodException: com.sms.spring.pojo.Person.()
at java.lang.Class.getConstructor0(Class.java:3082)
at java.lang.Class.getDeclaredConstructor(Class.java:2178)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80)
… 14 more

异常原因：Spring通过反射创建对象的时候需要用到该类中的无参构造器，而你写的类中没有。

解决方案：给类实体类加上无参构造器。

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③Caused by: org.springframework.beans.NotWritablePropertyException

Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property ‘list’ of bean class [com.sms.spring.pojo.Teacher]: Bean property ‘list’ is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:1060)
at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:918)
at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:82)
at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:62)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1489)
… 13 more

异常原因：通过Spring创建对象后,依赖注入属性时,某些属性未添加getter/setter方法,因此报错。

解决方案：给实体类加上缺失的getter/setter方法。

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④Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException:

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.sms.spring.service.UserService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1100)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:960)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:855)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480)
… 15 more

异常原因：spring未找到这样的一个bean,可能是这个类没扫描到,包扫描出现错误;可能是注解加错了或没加注解。

解决方案：设置正确的包扫描,并检查所有的注解是否标注正确没有遗漏。

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⑤Error creating bean with name ‘mathImpl’ defined in file :

Exception in thread “main” org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘mathImpl’ defined in file [E:\developer_tools\java\workspace\SSM\day3_spring\target\classes\com\sms\spring\aop\MathImpl.class]: Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: Pointcut is not well-formed: expecting ‘)’ at character position 0
execution(* com.sms.spring.aop.MathImpl.add(int,int)
^
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:547)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.(ClassPathXmlApplicationContext.java:83)
at com.sms.spring.aop.Test.main(Test.java:9)

异常原因：创建bean失败,使用spring进行aop开发时,切入点表达式写错了。

解决方案：检查切入点表达式是否缺失’)’,’,'等。

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⑥Class ‘org.springframework.transaction.event.TransactionalEventListenerFactory’ not found:

异常原因：spring未从项目中加载命名空间。

解决方案：

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⑦java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: is a MultipartResolver configured?

java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: is a MultipartResolver configured?
at org.springframework.util.Assert.notNull(Assert.java:112)
at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.resolveName(RequestParamMethodArgumentResolver.java:161)
at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:86)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:79)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:748)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110
at java.util.concurrent.ThreadPoolExecutor$ Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)

异常原因：spring实现上传功能的时候没有配置MultipartResolver解析器,java中的file类型不能转化为MultpartFile类型。

解决方案：在springMVC加入一个bean,class=“org.springframework.web.multipart.commons.CommonsMultipartResolver”。

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

</bean>
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