mybatis 批量插入

//单字段的批量更新  如：list存的只有id

  　/*将前端接收的id集合拼接的字符串解析*/

List<Integer> idList = new ArrayList<Integer>();
idList.add(1);
idList.add(2);
idList.add(3);

　　/*要修改的信息*/

RoleDO roleDO = new RoleDO();
roleDO.setModifier(baseConditions.getAdminId());
roleDO.setModifyTime(new Date());
roleDO.setIsDeleted(2);

 /*Example是where的条件，需要update的主键集合List*/
RoleDOExample roleDOExample = new RoleDOExample();
roleDOExample.createCriteria().andIdIn(integerList);
int i = roleDOMapper.updateByExampleSelective(roleDO, roleDOExample);

*sql语句类似
update role set  modifier=#{},modify_time =#{},is_deleted=2 where id in(1,3,5);



//多字段的批量更新  如：list存的只有对象

Mapper的接口

int addTeacherClass(@Param("teacherClassesList")List<TeacherClasses> list);

xml的sql

<insert id="addTeacherClass" parameterType="java.util.List">
    INSERT into tb_teacher_classes (org_id,teacher_id,class_id,course_id,state)
    VALUES
    <foreach collection="teacherClassesList" item="item" index="index" separator=",">

        (#{item.orgId},#{item.teacherId},#{item.classId},#{item.courseId},#{item.state})
    </foreach>
</insert>

逆向工程的Example使用的详解
https://blog.csdn.net/biandous/article/details/65630783