Consider defining a bean of type ‘xxx.xxxMapper‘ in your configuration

目录

解决办法

方式1：启动类加 @MapperScan【不行】

方式2：依赖引入问题【解决】

---

集成MyBatis，报如下错误：

Description:

Field userMapper in com.example.demo.service.impl.UserServiceImpl required a bean of type 'com.example.demo.dao.IUserMapper' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type 'com.example.demo.dao.IUserMapper' in your configuration.

解决办法

方式1：启动类加 @MapperScan【不行】

注解@Autowired是加上的

@Autowired
private IUserMapper userMapper;

参考网络说是要加@MapperScan

@SpringBootApplication
@MapperScan(value = "com.example.demo.dao")
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}

添加以后，引发问题：

Caused by: java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required

方式2：依赖引入问题【解决】

步骤1：注释启动类的  @MapperScan(value = "com.example.demo.dao")

步骤2：修改我的依赖引入

引入的是mybatis与spring相关的依赖，注释，换成与SpringBoot相关的依赖即可

        <!-- mybatis的依赖
        -->
<!--        <dependency>-->
<!--            <groupId>org.mybatis</groupId>-->
<!--            <artifactId>mybatis</artifactId>-->
<!--            <version>3.5.3</version>-->
<!--        </dependency>-->
        <!--mybatis和spring集成的依赖
        -->
<!--        <dependency>-->
<!--            <groupId>org.mybatis</groupId>-->
<!--            <artifactId>mybatis-spring</artifactId>-->
<!--            <version>2.0.3</version>-->
<!--        </dependency>-->

        <!--SpringBoot的Mybatis启动器-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.0.1</version>
        </dependency>

步骤3：刷新Maven

pom文件中，在步骤2，配置的依赖改变，clean和install以后是刷新不了的，需要点击上面的刷新按钮，刷新Maven