Mybatis：Mapper method attempted to return null from a method with a primitive return type (int)

关键词

SpringMVC SSM Mybatis eclipse

报错内容

Mybatis：Mapper method attempted to return null from a method with a primitive return type (int)

原因

Mapper.xml的标签用错了。。。（低级错误，轻喷。。。）
 
比如本来应该：
插入语句用<insert></insert>，更新语句用<update></update>，删除语句用<delete></delete>

结果全用成<select></select>

解决

用回对应的标签就行。

参考

Mybatis：Mapper method attempted to return null from a method with a primitive return type (int)