java generate unique string

Guid: that is, globally unique identifier (globally unique identifier) is also called UUID (universally unique identifier ). Therefore, the guid is the UUID. GUID is a 128-bit long number, which is generally expressed in hexadecimal

When the server system is developed, in order to adapt to the request of large data concurrency, we often need to asynchronous storage of data, especially in the distributed system, this time can not wait to insert the database returned to take the

(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

Python uses the current time and random number to generate a unique number. python current time This example describes how Python uses the current time and random number to generate a unique number. We will share this with you for your reference.

The UUID (universally unique Identifier) Globally unique identifier, which is a number generated on a machine that guarantees that all machines in the same time and space are unique. Based on the standard calculations developed by the Open Software

In the history of computer development language, there is never a language like Java, such as the support of so many vendors, there are so many development tools, Java rookie as ever into the Grand View garden of Grandma Liu, look at the flower eyes,

1. What is a Java Virtual Machine?A Java virtual machine is an imaginary machine that is simulated by software on an actual computer. The Java Virtual Machine has its own hardware, such as the processor, stack, and register. It also has the

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 (

Source author Wang HuiChapter 4 Basic Knowledge 1.1. Single-key password systemThe single-key cryptography system is a traditional encryption algorithm, which means that the sender and receiver of the information use the same key for encryption and

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