mybatis的批量更新操作

我们知道mybatis的插入和删除是可以支持批量操作的，但是update也是支持的，代码如下：

<update id="updateAll" parameterType="java.util.List">    <foreach collection="list" item="it" index="index" open="" close="" separator=";">      update SYSTEM_EXPERT_LIBRARY      SET USER_CODE = #{it.userCode,jdbcType=VARCHAR},      EXPERT_NAME = #{it.expertName,jdbcType=VARCHAR},      EXPERT_SEX = #{it.expertSex,jdbcType=CHAR},      EXPERT_MAIL = #{it.expertMail,jdbcType=VARCHAR},      EXPERT_ADDRESS = #{it.expertAddress,jdbcType=VARCHAR},      EXPERT_CARD = #{it.expertCard,jdbcType=VARCHAR},      EXPERT_PHONE = #{it.expertPhone,jdbcType=VARCHAR},      EXPERT_XILIE = #{it.expertXilie,jdbcType=VARCHAR},      SPECIALTY = #{it.specialty,jdbcType=VARCHAR},      STATUS = #{it.status,jdbcType=VARCHAR},      UPDATER = #{it.updater,jdbcType=VARCHAR}      where ID = #{it.id,jdbcType=INTEGER}    </foreach>  </update>

注意批量更新的时候，如果使用了druid数据源，则配置的时候要注意：不能配置wall拦截器，否则批量更新不成功。

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"><  property name="url" value="jdbc:mysql://10.3.3.133:6789/test?allowMultiQueries=true&useUnicode=true&characterEncoding=utf-8"/><property name="username" value="test"/>  <property name="password" value="test"/>        <!-- 配置监控统计拦截的filters --><!-- <property name="filters" value="stat,log4j,wall"/> 这种配置不支持批量更新语句--></bean>

还有重要的一点是要默认开启支持批量修改操作

Url拼接?allowMultiQueries=true

jdbc.driverClassName=com.mysql.cj.jdbc.Driverjdbc.url=jdbc:mysql://:3306/xx?allowMultiQueries=truejdbc.username=jdbc.password=

mybatis的批量新增删除

<delete id="deleteBatch">  delete from t_acl where id in  <foreach collection="list" index="index" item="item" separator="," open="(" close=")">    #{item.id}  </foreach</delete>

sql批量查询多条数据（sql数据库查询语句大全）

<insert id="insertAll" parameterType="java.util.List" useGeneratedKeys="false">    insert into SYSTEM_EXPERT_LIBRARY    <foreach collection="list" item="it" index="index" separator=",">  (  )  </foreach></insert>

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