BindingException: Invalidbound statement (not found)

一、报错

二、原因

未扫描到Mapper文件

三、解决

方式一

mybatis:
  mapperLocations: classpath:mapper/**/*.xml

方式二

<!-- 项目打包时会将java目录中的*.xml文件也进行打包 -->
<build>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>