Description: 
 
A component required a bean of type 'com.example.democrud.democurd.usermapper.DaoMapper' that could not be found.  Error creating bean with name 'userServiceImpl': 
 
 
Action: 
 
Consider defining a bean of type 'com.example.democrud.democurd.usermapper.DaoMapper' in your configuration.

我自己解决方式：
在pom导入mybatis

<!-- mybatis整合Springboot -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.1.1</version>
</dependency>

注解在mapper 加入 @Mapper
也可加mapperscan（“mapper路径”） @Mapper

在启动类加入

@MapperScan(basePackages = "com.example.democrud.democurd.usermapper")

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Consider defining a bean of type ‘com.example.democrud.democurd.usermapper.DaoMa