1、在你的启动类上面加个注解:@MapperScan("com.orange.dao")
2、在你的application.properties文件里面加个:mybatis-plus.mapper-locations=classpath:mapper/*Dao.xml
3、在你的pom.xml的build节点下面加个:
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.yml</include>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.yml</include>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
xml文件截图一下
启动类上指定了没