springboot中mybatis报错

mybatis报错，无法找到mapper文件

2021-04-04 17:06:59.949 ERROR 8900 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

A component required a bean of type 'com.example.demo.dao.UserMapper' that could not be found.


Action:

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


Process finished with exit code 0

解决方法

一、在主方法类XXXApplication添加注解

package com.example.demo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
//在这添加注解，其中com.example.demo.dao为你的mapper文件存放的包路径，更换成你的路径即可。
@MapperScan("com.example.demo.dao")
@SpringBootApplication
public class DemoApplication {

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

二、新建一个mybatis配置类

在config包下新建一个MybatisConfig.java

package com.example.demo.config;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Configuration;

/**
 * @program: demo
 * @description: mybatis配置类
 * @author: tth
 * @create: 2021-04-04 15:24
 **/
 //在这添加注解，其中com.example.demo.dao为你的mapper文件存放的包路径，更换成你的路径即可。
@Configuration
@MapperScan("com.example.demo.dao")
public class MybatisConfig {
}