Mybatis的拦截器，有时可以使用，有时又莫名其妙不可以使用，时不时就会报找不到拦截器类

Question

Caused by: 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.interceptor.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.interceptor.PageInterceptor

at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:500)

at org.mybatis.spring.SqlSessionFactoryBean.afterPropertiesSet(SqlSessionFactoryBean.java:380)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624)

... 49 more

Caused by: 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.interceptor.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.interceptor.PageInterceptor

at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:115)

at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:95)

at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:494)

... 52 more

Caused by: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.interceptor.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.interceptor.PageInterceptor

at org.apache.ibatis.builder.BaseBuilder.resolveClass(BaseBuilder.java:118)

at org.apache.ibatis.builder.xml.XMLConfigBuilder.pluginElement(XMLConfigBuilder.java:148)

at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:104)

... 54 more

Caused by: org.apache.ibatis.type.TypeException: Could not resolve type alias 'com.interceptor.PageInterceptor'.  Cause: java.lang.ClassNotFoundException: Cannot find class: com.interceptor.PageInterceptor

at org.apache.ibatis.type.TypeAliasRegistry.resolveAlias(TypeAliasRegistry.java:120)

at org.apache.ibatis.builder.BaseBuilder.resolveAlias(BaseBuilder.java:149)

at org.apache.ibatis.builder.BaseBuilder.resolveClass(BaseBuilder.java:116)

... 56 more

Caused by: java.lang.ClassNotFoundException: Cannot find class: com.interceptor.PageInterceptor

at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:200)

at org.apache.ibatis.io.ClassLoaderWrapper.classForName(ClassLoaderWrapper.java:89)

at org.apache.ibatis.io.Resources.classForName(Resources.java:261)

at org.apache.ibatis.type.TypeAliasRegistry.resolveAlias(TypeAliasRegistry.java:116)

... 58 more

不晓得为什么会报这错误，

Answer 1

源生活 2017-09-07 09:06:12

开发工具每次重新打开确实可能会出现这种情况，需要在Tomcat下重新【Publish】一下工程，如果还是不行，你可以随意修改工程里一个文件，比如加个空格或回车，让Tomcat出现【Republish】的提示，然后【Publish】，一定有效，就是让Tomcat知道工程有变化，需要重新部署，这个时候就好了，可能是开发工具每次重新打开后，Tomcat上次部署的工程会缺class，具体原因不明，可能是eclipse的一个bug。

• 提问者 迷茫_坚定 #1

  修改了之后点击保存，tomcat会自动部署，但是还是失败，，，然后，我右击项目名，然后close project ，再open project就可以了

• 源生活 #2

  修改后不能依赖tomcat自动部署，要手动，在tomcat没启动的时候修改后部署，肯定可以。