mybatis的批量操作

foreach关键字：

批量查找/删除：用where id in<foreach> （xxx，yyy，zzz ...）</foreach>

批量更新：需要开启批量sql，比如druid需要在filter里设置开启批量sql等

<update id="batchUpdateLevel" parameterType="map">
  <foreach collection="sysDeptList" item="sysDept" separator=";">
    UPDATE sys_dept
    SET level = #{dept.level}
    WHERE id = #{dept.id}
  </foreach>
</update>

批量插入：

<insert id="batchInsert" parameterType="map">
  insert into sys_role_acl (role_id, acl_id, operator, operate_time, operate_ip)
  values
  <foreach collection="roleAclList" item="roleAcl" separator=",">
    (#{roleAcl.roleId}, #{roleAcl.aclId}, #{roleAcl.operator}, #{roleAcl.operateTime}, #{roleAcl.operateIp})
  </foreach>
</insert>