Caused by: org.apache.ibatis.type.TypeException: Could not resolve type alias 'XXX'

╰+哭是因爲堅強的太久メ 2023-10-09 12:35 14阅读 0赞

项目开发中遇到问题：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in URL [file:/F:/Tomcat/apache-tomcat-7.0.69/webapps/cmp/WEB-INF/classes/applicationContext.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [F:\Tomcat\apache-tomcat-7.0.69\webapps\cmp\WEB-INF\classes\mybatis\sys\StudentMapper.xml]'; nested exception is java.lang.RuntimeException: Error parsing Mapper XML. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'Student'.  Cause: java.lang.ClassNotFoundException: Cannot find class: Student
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1553)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
    	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.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
    	... 92 more
    Caused by: org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [F:\Tomcat\apache-tomcat-7.0.69\webapps\cmp\WEB-INF\classes\mybatis\sys\StudentMapper.xml]'; nested exception is java.lang.RuntimeException: Error parsing Mapper XML. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'Student'.  Cause: java.lang.ClassNotFoundException: Cannot find class: Student
    	at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:462)
    	at org.mybatis.spring.SqlSessionFactoryBean.afterPropertiesSet(SqlSessionFactoryBean.java:336)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
    	... 99 more
    Caused by: java.lang.RuntimeException: Error parsing Mapper XML. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'Student'.  Cause: java.lang.ClassNotFoundException: Cannot fi
    nd class: Student
    	at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:113)
    	at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java:88)
    	at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:460)
    	... 102 more
    Caused by: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'Student'.  Cause: java.lang.ClassNotFoundException: Cannot find class: Student
    	at org.apache.ibatis.builder.BaseBuilder.resolveClass(BaseBuilder.java:100)
    	at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:257)
    	at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:244)
    	at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements(XMLMapperBuilder.java:236)
    	at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:109)
    	... 104 more
    Caused by: org.apache.ibatis.type.TypeException: Could not resolve type alias 'Student'.  Cause: java.lang.ClassNotFoundException: Cannot find class: Student
    	at org.apache.ibatis.type.TypeAliasRegistry.resolveAlias(TypeAliasRegistry.java:113)
    	at org.apache.ibatis.builder.BaseBuilder.resolveAlias(BaseBuilder.java:127)
    	at org.apache.ibatis.builder.BaseBuilder.resolveClass(BaseBuilder.java:98)
    	... 108 more
    Caused by: java.lang.ClassNotFoundException: Cannot find class: Student
    	at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:188)
    	at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:87)
    	at org.apache.ibatis.io.Resources.classForName(Resources.java:254)
    	at org.apache.ibatis.type.TypeAliasRegistry.resolveAlias(TypeAliasRegistry.java:109)
    	... 110 more

发现在resultMap type中直接使用了类的别名，但是并没有定义：

需要在mybatis-config.xml添加：