简单描述：做开发的时候，会遇到一次插入好多条记录，怎么做好呢？

解决思路：循环insert啊！  哪凉快那呆着去←!←  这样会增加数据库开销的，当然不能这么干了，要在sql上下功夫。看代码，一下就明白了

代码

private void saveRoleOrgRes(String resIds,OhSysPriRoleOrgVo roleOrgVo) throws Exception {  //service层代码
    if(Tools.notEmpty(resIds)){
        List<OhSysPriRoleOrg> list = new ArrayList<>();
        String[] resIdArr = resIds.split(",");  //剪切id字符串
        for (String resId: resIdArr) {
            OhSysPriRoleOrg roleOrg = new OhSysPriRoleOrg();
            roleOrg.setRoleOrgId(UuidUtil.get32UUID());
            roleOrg.setOrgId(roleOrgVo.getOrgId());
            roleOrg.setResId(resId);  //为每个对象的id赋值
            roleOrg.setRoleId(roleOrgVo.getRoleId());
            roleOrg.setPriOrgLevel(roleOrgVo.getOrgLevel());
            list.add(roleOrg);
        }
        dao.save("XXXXRoleOrgMapper.insert",list);
    }
}
mapper的sql：

<insert id="insert" parameterType="java.util.List">
    insert into <include refid="tableName"></include>
    (
    <include refid="Field"></include>
    ) values
    <foreach collection="list" item="item" index="index" separator=",">
        (
          <include refid="FieldValue"></include>
        )　　
    </foreach>
</insert>

 <sql id="FieldValue">  
       #{item.xxxOrgId},
       #{item.xxxId},
       #{item.xxId},
       #{item.xxxLevel},
       #{item.xxxParentId}
</sql>

总结：这就是sql语法灵活运用的表现啦，对list中的每个对象加上foreach循环,但是 要特别的注意，映射取值的时候里边一定要放item，否则的话会mybatis绑定异常

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'xxxId' not found.Available parameters are [ xxxId ,list ]。