MyBatis Exception

简单记录 mybatis 使用时遇到的异常，便于日后查阅。

IllegalArgumentException

报错信息如下:

  [plaintext]
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Caused by: org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [~/XXXMapper.xml]'; nested exception is java.lang.IllegalArgumentException: Mapped Statements collection already contains value for ~.XXXMapper.insert
	at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:522)
	at org.mybatis.spring.SqlSessionFactoryBean.afterPropertiesSet(SqlSessionFactoryBean.java:381)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
	... 39 more
Caused by: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for ~.XXXMapper.insert
	at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:844)
	at org.apache.ibatis.session.Configuration$StrictMap.put(Configuration.java:816)
	at org.apache.ibatis.session.Configuration.addMappedStatement(Configuration.java:640)
	at org.apache.ibatis.builder.MapperBuilderAssistant.addMappedStatement(MapperBuilderAssistant.java:302)
	at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parseStatement(MapperAnnotationBuilder.java:326)
	at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parse(MapperAnnotationBuilder.java:131)
	at org.apache.ibatis.binding.MapperRegistry.addMapper(MapperRegistry.java:72)
	at org.apache.ibatis.session.Configuration.addMapper(Configuration.java:713)
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.bindMapperForNamespace(XMLMapperBuilder.java:408)
	at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java:94)
	at org.mybatis.spring.SqlSessionFactoryBean.buildSqlSessionFactory(SqlSessionFactoryBean.java:520)
	... 42 more

网上原因说如下：

  • mapper 中存在 id 重复的值

  • mapper 中的 parameterType 或 resultType 为空

我仔细的对照了自己的文件，没有直接出现上面的两种情况，但是原因肯定是这个。

罪魁祸首是这个：

  [java]
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import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.SqlServerMapper;

public interface MyMapper<T> extends Mapper<T>, SqlServerMapper<T> {
}

在 Mapper、SqlServerMapper 都有 insert() 方法。所以引发了上述问题。

我特意验证了下，Mapper 中的 insert() 是可用的。不知为何此处要有2个相同的方法？

直接删除了对于 SqlServerMapper<T> 的继承。