springboot mybatis 配置

<!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.1.4</version>
</dependency>
提前导入包

在application.properties

#整合mybatis
mybatis.type-aliases-package=com.yao.pojo
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml

　　

package com.yao.mapper;

import com.yao.pojo.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.List;

//Mapper这个注解表示这是一个mybatis的一个mapper类
@Mapper
@Repository//dao层的注解
public interface UserMapper {
List<User> queryUserList();

    User queryUserById(int id);

    int addUser(User user);

    int updateUser(User user);

    int deleteUser(int id);

}