Hibernate 3.0 英文教程

dracularking

http://www.roseindia.net/hibernate/index.shtml
 
来由是朝着generator：
 
Here are the list of some commonly used generators inhibernate:

Generator	Description
increment	It generates identifiers of type long, short or int that        are unique only when no other process is inserting data into the same        table. It should not the used in the clustered environment.
identity	It supports identity columns in DB2, MySQL, MS SQL Server,        Sybase and HypersonicSQL. The returned identifier is of type long, short        or int.
sequence	The sequence generator uses a sequence in DB2, PostgreSQL,        Oracle, SAP DB, McKoi or a generator in Interbase. The returned        identifier is of type long, short or int
hilo	The hilo generator uses a hi/lo algorithm to efficiently        generate identifiers of type long, short or int, given a table and        column (by default hibernate_unique_key and next_hi respectively) as a        source of hi values. The hi/lo algorithm generates identifiers that are        unique only for a particular database. Do not use this generator with        connections enlisted with JTA or with a user-supplied connection.
seqhilo	The seqhilo generator uses a hi/lo algorithm to        efficiently generate identifiers of type long, short or int, given a        named database sequence.
uuid	The uuid generator uses a 128-bit UUID algorithm to        generate identifiers of type string, unique within a network (the IP        address is used). The UUID is encoded as a string of hexadecimal digits        of length 32.
guid	It uses a database-generated GUID string on MS SQL Server        and MySQL.
native	It picks identity, sequence or hilo depending upon the        capabilities of the underlying database.
assigned	lets the application to assign an identifier to the object        before save() is called. This is the default strategy if no        <generator> element is specified.
select	retrieves a primary key assigned by a database trigger by        selecting the row by some unique key and retrieving the primary key        value.
foreign	uses the identifier of another associated object. Usually        used in conjunction with a <one-to-one> primary key association.