Consider defining a bean of type 'XX.XX.XX.XX.mapper.XXMapper' in your configuration.

今天构建一个springboot 项目，采用mybatis+mysql 然后就出现了这种错误....浪费我半天时间

 1 Description:
 2 
 3 Field loginLogMapper in com.guoll.modules.sysmanage.service.PassagewayService required a bean of type 'com.guoll.modules.sysmanage.mapper.LoginLogMapper' that could not be found.
 4 
 5 The injection point has the following annotations:
 6 - @org.springframework.beans.factory.annotation.Autowired(required=true)
 7 
 8 
 9 Action:
10 
11 Consider defining a bean of type 'com.guoll.modules.sysmanage.mapper.LoginLogMapper' in your configuration.
12 
13 
14 Process finished with exit code 0

错误原因：是由于springboot 扫描不到 mapper

解决方案：

第一种：在mapper包下类配置@Mapper 注解

第二种：在springboot 启动类上配置包扫描@ComponentScan()

第三种：在springboot 启动类上配置Mapper扫描@MapperScan（注意：必须将路径指定到 xxx.xxx.xxx.mapper 包为止，否则依旧扫描不到）多个mapper路径可以以 @MapperScan（{mapper1路径,mapper2路径}）

这种本人亲测

第四种解决方法，就是将 spring boot启动类方法mapper上级，这样也可以扫描到

工作中出了问题，解决时间太久，记录一下