https://blog.youkuaiyun.com/android_lover2014/article/details/52769594?utm_source=blogxgwz14?ops_request_misc=&request_id=&biz_id=102&utm_term=%E6%80%8E%E6%A0%B7%E4%BF%AE%E6%94%B9MYSQL%20%E9%A2%9D%E5%A4%96%20auto_increment&utm_medium=distribute.pc_search_result.none-task-blog-2allsobaiduweb~default-0-52769594