1、java生成uuid
string a = UUID.randomUUID().toString()
参考：https://blog.csdn.net/qq_36411874/article/details/80360207
2、C#生成uuid
string a = Guid.NewGuid();
参考：https://cloud.tencent.com/developer/ask/90572
3、oracle生成uuid
select sys_guid() from dual
参考：https://www.cnblogs.com/alfredxiao/archive/2010/07/13/oracle_guid.html
原文：https://www.cnblogs.com/masha2017/p/12110726.html