出现的原因是
src文件下的mapper有mapper接口和映射文件，而target下的mapper文件却没有映射文件
===========================解决方案==================================
1.把映射文件 放到resources 目录下 结构目录一模一样
2.在pom.xml中导入以下代码
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.*</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
springboot整合mybatis错误 Invalid bound statement (not found): com.yuan.mapper.UserMapper.getUserList
原文：https://www.cnblogs.com/proyuan/p/11802368.html