Error instantiating interface com.dao.UserDao with invalid types () or values (). Cause: java.lang.N

报错结果

### Cause: org.apache.ibatis.reflection.ReflectionException: Error instantiating interface com.dao.UserDao       with invalid types () or values (). Cause: java.lang.NoSuchMethodException: com.dao.UserDao.<init>()

错误原因

<mapper namespace="com.dao.UserDao">
<!--    查询所有,ID名和接口的方法名同名-->
<select id="findAll" resultType="com.domain.User">select * from user
</select>
</mapper>

resultType类型和数据库表的类型不一致,仔细检查一下resultType是不是我们想要返回的bean类型

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Error instantiating interface com.dao.UserDao with invalid types () or values (). Cause: java.lang.N

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