mybatis报“Result Maps collection already contains value forxxx”的解决...

小渣渣

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'accountMapper' defined in file [C:\project\java\itsvseapi\target\classes\com\itsvse\test\mapper\AccountMapper.class]: Cannot resolve reference to bean 'DBDataSqlSessionFactory' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'DBDataSqlSessionFactory' defined in class path resource [com/itsvse/test/config/DefaultDataSourceConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.ibatis.session.SqlSessionFactory]: Factory method 'sqlSessionFactory' threw exception; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: 'file [C:\project\java\itsvseapi\target\classes\mapper\AccountMapper.xml]'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for com.itsvse.test.mapper.AccountMapper.BaseResultMap

ssm搭建过程中启动tomcat,报错:

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'accountMapper'



原因:

这些代码因为是工具自动生成的,所以也没仔细检查.一个小小的错误，导致的。

由于使用ibatis的AccountMapper.xml实现接口AccountMapper.java中的方法的时候的id有重复的值，比如
    <select id="AccountTableMap"    resultMap="AccountTableResult"> 中的AccountMapper在一个xml文件中有两个这样的id，修改过来即可.