yb课堂实战之Mybatis打通Mysql数据库《二》

配置mybatis连接Mysql数据库

server.port=8081
# ========================数据库相关配置=====================
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/online_ybclass?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=root
# 使用阿里巴巴druid数据源，默认使用自带
# spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#开启控制台打印sql
mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
# mybatis 下划线转驼峰配置，两者都可以
# mybatis.configuration.mapUnderscoreToCamelCase=true
mybatis.configuration.map-underscore-to-camel-case=true
# 配置扫描
mybatis.mapper-locations=classpath:mapper/*.xml
#配置xml的结果别名
mybatis.type-aliases-package=net.ybclass.online_ybclass.domain

启动类上添加扫描Mapper路径

VideoMapper.xml

<?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="net.ybclass.online_ybclass.mapper.VideoMapper">
    <select id="ListVideo" resultType="net.ybclass.online_ybclass.domain.Video">
SELECT * FROM video
    </select>
</mapper>