異常1.空指針異常

異常信息摘要：

java.lang.NullPointerExceptionat com.jege.framework.service.UserServiceTest.get(UserServiceTest.java:36)

異常信息說明：server接口沒有注入
解決思路：可能的原因：

1.xml版本，沒有寫set方法，spring配置文件配置注入寫的有問題 2.注解版本，沒有寫@Autowired或者@Resource 3.測試類上面沒有標注 @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:applicationContext.xml")

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異常2.bean的名字name或者id已經(jīng)存在

異常信息摘要：

org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: Bean name 'helleService' is already used in this <beans> element

異常信息說明：helleService bean對象已經(jīng)存在
解決思路：把重復(fù)的名字改一下：

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異常3.web項目找不到默認配置文件

異常信息摘要：

org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [applicationContext.xml]; nested exception is java.io.FileNotFoundException: class path resource [WEB-INF/applicationContext.xml] cannot be opened because it does not exist

異常信息說明：web項目默認會在WEB-INF下找applicationContext.xml配置文件
解決思路：在web.xml配置一個上下文屬性：

<context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value> </context-param>

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異常4.命名空間配置錯誤

異常信息摘要：

nested exception is org.xml.sax.SAXParseException: cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'aop:confog'.

異常信息說明：沒有找到aop:confog的配置
解決思路：配置好schema的aop命名空間

xmlns:aop="http://www.springframework.org/schema/aop" http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd

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異常5.bean不是唯一的異常

異常信息摘要：

org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [com.jege.ssh.dao.IUserDao] is defined: expected single matching bean but found 2: UserDao1,UserDao2at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:313)

異常信息說明：注入的接口有2個實現(xiàn)
解決思路：去掉一個實現(xiàn)類，一個接口最好只有一個實現(xiàn)

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異常6.bean沒有定義，不存在

異常信息摘要：

org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'userDao' is defined

異常信息說明：userDao沒有定義
解決思路：在applicationContext.xml中找不到id為userDao的bean，配置一下或者注解沒有標注@Repository

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異常7.server接口沒有注入

異常信息摘要：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.jege.framework.service.UserServiceTest': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.jege.framework.service.IUserService com.jege.framework.service.UserServiceTest.userService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.jege.framework.service.IUserService] 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)} Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.jege.framework.service.IUserService com.jege.framework.service.UserServiceTest.userService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.jege.framework.service.IUserService] 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)} Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.jege.framework.service.IUserService] 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)}

異常信息說明：server接口沒有注入
解決思路：可能的原因：

1.xml版本，沒有寫set方法，spring配置文件配置注入有問題 2.注解版本，<context:component-scan base-package="com.jege.framework包寫錯" />

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異常8.aspectjweaver-1.8.0.jar spring4要使用高版本

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