uuid java length

This article comes from http://my.oschina.net/noahxiao/blog/132277, personal storage use1. BackgroundWhen I use Hibernate to do object mapping, I always use the UUID to master the key. Since Hibernate's UUID needs to occupy 32-bit characters, it

Java UUID generation tool concurrency TestI. Know UUIDWikipedia, a free encyclopediaThe universal Unique Identifier (UUID) is a standard for Software construction. It is also the organization of the Open Software Foundation (OSF) in the Distributed

BASE58 IntroductionBASE58 uses a character set of "123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ", from which it is not difficult to see, Base58 are pure numbers and letters and remove the characters that cause visual confusion (0:

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 Foundation, OSF, in a distributed computing environment ( Distributed Computing

I looked for a long time on the internet, some people say UUID is better, is in the sub-database table, merge data what is easier, also some people say self-increase, to the table of data more time, performance than the UUID is much better, in the

I have been searching for it online for a long time. Some people say that uuid is better, that is, it is easier to merge data into sub-databases and sub-tables, and some people say that auto-increment is better, when there is more data in the table,

The UID 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 ( Distributed Computing

UUID and guid UUID is a string generated after the 32-byte string is separated by four hyphens (-), with a total length of 36 bytes. For example: 550e8400-e29b-41d4-a716-446655440000 Http://gohands.blogbus.com/logs/147479174.html GUID is

Project deployment, the following warnings are available during startup:[WARN]: Using org.hibernate.id.UUIDHexGenerator which does not generate IETF RFC 4122 compliant UUID values; Consider using Org.hibernate.id.UUIDGenerator insteadTo view the

1. Set the primary key in the database to varchar (32). 2. Write @GenericGenerator to the class header in entity (name = "Jpa-uuid", strategy = "uuid") 3. Write @GeneratedValue (generator = "Jpa-uuid") at the top of the ID primary key in entity