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 12:35 140阅读 0赞

项目开发中遇到问题：

  1. 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
  2.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1553)
  3.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
  4.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
  5.     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
  6.     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
  7.     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
  8.     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
  9.     at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
  10.     ... 92 more
  11. 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
  12.     at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:462)
  13.     at org.mybatis.spring.SqlSessionFactoryBean.afterPropertiesSet(SqlSessionFactoryBean.java:336)
  14.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
  15.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
  16.     ... 99 more
  17. 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
  18. nd class: Student
  19.     at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:113)
  20.     at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java:88)
  21.     at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:460)
  22.     ... 102 more
  23. 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
  24.     at org.apache.ibatis.builder.BaseBuilder.resolveClass(BaseBuilder.java:100)
  25.     at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:257)
  26.     at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:244)
  27.     at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements(XMLMapperBuilder.java:236)
  28.     at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:109)
  29.     ... 104 more
  30. Caused by: org.apache.ibatis.type.TypeException: Could not resolve type alias 'Student'.  Cause: java.lang.ClassNotFoundException: Cannot find class: Student
  31.     at org.apache.ibatis.type.TypeAliasRegistry.resolveAlias(TypeAliasRegistry.java:113)
  32.     at org.apache.ibatis.builder.BaseBuilder.resolveAlias(BaseBuilder.java:127)
  33.     at org.apache.ibatis.builder.BaseBuilder.resolveClass(BaseBuilder.java:98)
  34.     ... 108 more
  35. Caused by: java.lang.ClassNotFoundException: Cannot find class: Student
  36.     at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:188)
  37.     at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:87)
  38.     at org.apache.ibatis.io.Resources.classForName(Resources.java:254)
  39.     at org.apache.ibatis.type.TypeAliasRegistry.resolveAlias(TypeAliasRegistry.java:109)
  40.     ... 110 more

发现在resultMap type中直接使用了类的别名，但是并没有定义：

  1. <resultMap type="Student" id="StudentMap">  
  2.        <result column="STU_NO" property="stuNo" />  
  3.        <result column="STU_NAME" property="stuName" />  
  4.        <result column="STU_SEX" property="stuSex" />  
  5.        <result column="STU_AGE" property="stuAge" />  
  6. </resultMap>

需要在mybatis-config.xml添加：

  1. <typeAlias type="com.cmp.entity.Student" alias="Student"/>

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