问题：The alias ‘Product‘ is already mapped to the value ‘category.Product‘
1、运行报错的截图： 2、解决方法： ①查看mybatis-config.xml文件是否已经对Product注解，如图所示，将红色框内的代码注释后保存即可： ②根据其它博客，目前的解决方法是使用mybatis-spring 2.0.0或2.0.2-SNAPSHOT。
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