Springboot整合mybatis

package com.ntvu.springbootmybatis.entity;

import lombok.Data;

/**
 * @Data注解，使用lombok自动生成get、set、toString等方法。
 */
@Data
public class User {
    private Integer id ;
    private String uname;
    private Integer age;
}

<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<scope>provided</scope>
</dependency>

package com.ntvu.springbootmybatis.mapper;

import com.ntvu.springbootmybatis.entity.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.List;

@Mapper
@Repository
public interface UserMapper {
    public List<User> findAll();
}

#  datasource
spring:
  datasource:
#    连接本地mysql可省略端口号
    url: jdbc:mysql://localhost:3306/springboot?serverTimezone=UTC
    username: root
    password: 123456
    driver-class-name: com.mysql.cj.jdbc.Driver


#mybatis
mybatis:
  mapper-locations: classpath:mapper/*Mapper.xml  #mapper映射文件
  type-aliases-package: com.ntvu.springbootmybatis.entity   #UserMapper.xml中扫包的别名(user)配置

#  config-location:  #指定mybatis的核心配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ntvu.springbootmybatis.mapper.UserMapper">
    <select id="findAll" resultType="user">
        select * from t_user
    </select>
</mapper>

package com.ntvu.springbootmybatis;

import com.ntvu.springbootmybatis.entity.User;
import com.ntvu.springbootmybatis.mapper.UserMapper;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import java.util.List;

@SpringBootTest
class SpringbootMybatisApplicationTests {

    @Autowired
    private UserMapper userMapper;
    @Test
    public void testFindAll() {
        List<User> list = userMapper.findAll();
        System.out.println(list);
    }


}