mybatis 的批量更新操作sql

古城微笑少年丶 2022-05-19 08:00 2736阅读 0赞

# 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="updateBatch" parameterType="list" keyProperty="id" useGeneratedKeys="true">
      <foreach collection="list" index="index" item="item" open="" separator=";" close="">
        update t_acl
        <set>
          acl_desc = #{item.aclDesc,jdbcType=VARCHAR},
          update_time = #{item.updateTime,jdbcType=TIMESTAMP}
        </set>
        WHERE device_id = #{item.deviceId,jdbcType=VARCHAR} and acl_number = #{item.aclNumber,jdbcType=VARCHAR}
      </foreach>
    </update>

--------------------

批量插入：

<insert id="insertBatch" parameterType="list" keyProperty="id" useGeneratedKeys="true">
      insert into t_acl (device_id, acl_number, acl_desc, create_time, update_time)
        values
        <foreach collection="list" separator="," item="item" index="index">
          (#{item.deviceId,jdbcType=VARCHAR}, #{item.aclNumber,jdbcType=VARCHAR},
          #{item.aclDesc,jdbcType=VARCHAR}, #{item.createTime,jdbcType=TIMESTAMP}, #{item.updateTime,jdbcType=TIMESTAMP})
        </foreach>
    </insert>

批量删除：

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

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"/>
        
        <property name="initialSize" value="1"/>
        <property name="minIdle" value="1"/>
        <property name="maxActive" value="20"/>
        
        <property name="maxWait" value="60000"/>
        
        <property name="timeBetweenEvictionRunsMillis" value="60000"/>
        
        <property name="minEvictableIdleTimeMillis" value="300000"/>
        
        <property name="poolPreparedStatements" value="true"/>
        <property name="maxPoolPreparedStatementPerConnectionSize" value="20"/>
        
       
        <property name="filters" value="stat,log4j"/>
    </bean>