Mybatis批量更新数据库

首先上的是yml文件的里面的内容

记住下面的

&allowMultiQueries=true必须要加，不然会引起The error may involve defaultParameterMap报错，是因为mybatis默认不支持一次性插入多条的语法。

server:
  port: 8181

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/nbsystem?serverTimezone=UTC&allowMultiQueries=true
    username: root
    password: root
pagehelper:
  helper-dialect: mysql
  reasonable: true
  support-methods-arguments: true
  params:

接下来看xml文件的

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.demo.ProvinceMapper">
    <update id="addProvince">
        <foreach separator=";" collection="list" item="provincePojos" index="index">
            update province
            <set>
                ProvinceCode=#{provincePojos.StringString}
            </set>
            where id=#{provincePojos.area}
        </foreach>
    </update>
</mapper>

并且与之对应的mapper接口

int addProvince(List<provincePojo> provincePojos);