<?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.llfy.demo.dao.LoginMapper">
    <resultMap id="BannerResultMap" type="com.llfy.demo.entity.Login">
        <result property="id" column="id" jdbcType="INTEGER" />
        <result property="name" column="name" jdbcType="VARCHAR" />
        <result property="password" column="password" jdbcType="VARCHAR" />
    </resultMap>
    <select id="getAll" resultType="com.llfy.demo.entity.Login">
        select * from login
    </select>
</mapper>

package com.llfy.demo.dao;

import com.llfy.demo.entity.Login;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;
@Mapper
public interface LoginMapper {
    /**
     *  查询管理员列表。
     * @return
     */
    List<Login> getAll();
}

package com.llfy.demo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RestController;

@RestController
@SpringBootApplication
@MapperScan("com.llfy.demo.dao")
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

}