java create unique id

This article mainly describes how to generate globally unique IDs in a distributed system. Preface Simply generating global IDs is not a challenge, generating a global unique ID to meet the following requirements: Ensure that the generated ID is

Unique id generated by JAVA UUIDWhen designing a table, a requirement project must process more concurrent data. Similar orders cannot be duplicated and must be unique. I thought it would be nice to get a timestamp accurate to milliseconds. Later I

(Original link: http://blog.csdn.net/carefree31441/article/details/3998553)The UUID meaning is a universal unique identifier (universally unique Identifier), which is a software construction standard and is also organized by the Open Software

------------I do not have him, but the hand is ripe, humble and foolish, and eager to be hungry-------------This blog has to say, how to create a unique file name , create a unique string string Why create a unique ? In many cases, such as file

The requirements of the recent project, to determine the only one piece of data, the original seems to have met, forget, and now record. Implementing a UNIQUE constraint may also not be unique to the primary key.A UNIQUE constraint in Oracle is a

I. Overview of the UUIDThe UUID meaning is a universal unique identifier (universally unique Identifier), which is a software construction standard and is also organized by the Open Software Foundation, OSF, in a distributed computing environment (

writer:bysocket (mud and brick pulp carpenter) Micro-Blog: Bysocket Watercress: Bysocket reprint it anywhere u want DemandWhen designing a table, the project should deal with some data that is more concurrent, such that the order

GUID (Global unique identifier) Globally unique identifier, which is a 16-byte binary value generated by the identity number on the network card (each network card has a unique identification number) and the unique number of the CPU clock.The format

"PHP" MySQL Global ID Generation scheme, PHPMYSQL global ID Production system with the growth of business will always go through a business volume from small to large process, scalability is considered a database system high availability of an

Java thread surface question Top 50Original Link: http://www.importnew.com/12773.htmlThis article is translated by Importnew-li Guang from Javarevisited. Welcome to join the Java Team. Please refer to the requirements at the end of this article for