hibernate加jpa自帶一共14種。
1.native
@id
@generatedvalue(generator = "gen")
@genericgenerator(name = "gen", strategy = "native")
@id
@generatedvalue(strategy=generationtype.auto)
2.table : org.hibernate.id.enhanced.tablegenerator
@id
@generatedvalue(strategy=generationtype.table, generator="empgen")
@tablegenerator(
name="empgen",
table="id_gen",
pkcolumnname="gen_key",
valuecolumnname="gen_value",
pkcolumnvalue="emp_id",
allocationsize=1)
public int id;
3.uuid : org.hibernate.id.uuidhexgenerator
最高生成36位長唯一字串（加上分隔符），預設32位
@id
@generatedvalue(generator = "gen")
@genericgenerator(
name = "gen",
strategy = "uuid",
parameters=)
private string id;
4.hilo : org.hibernate.id.tablehilogenerator
@id
@generatedvalue(generator="gen")
@genericgenerator(
name="gen",
strategy="hilo",
parameters=)
private int id;
5.assigned : org.hibernate.id.assigned
@id
private int id;
6.identity : org.hibernate.id.identitygenerator
@id
@generatedvalue(strategy=generationtype.identity)
private int id;
7.select : org.hibernate.id.selectgenerator
8.sequence : org.hibernate.id.sequencegenerator
@id
@generatedvalue(generator="gen")
@genericgenerator(
name="gen",
strategy="sequence",
parameters=)
private int id;
@id
@generatedvalue(strategy=generationtype.sequence)
private int id;
9.seqhilo : org.hibernate.id.sequencehilogenerator
@id
@generatedvalue(generator="gen")
@genericgenerator(
name="gen",
strategy="seqhilo",
parameters=)
private int id;
10.increment : org.hibernate.id.incrementgenerator
@entity
@table(name = "id_increment_gen")
public class incrementgen )
private int id;
select max (ids_.id) from ( select id from id_increment_gen ) ids_select max (ids_.id) from ( select id from id_increment_gen1 union select id from id_increment_gen2 ) ids_12.guid : org.hibernate.id. guidgenerator
@id
@generatedvalue(generator = "gen")
@genericgenerator(name = "gen", strategy = "guid")
private string id;
13.uuid.hex : org.hibernate.id.uuidhexgenerator // uuid.hex is deprecated
14.sequence-identity : org.hibernate.id.sequenceidentitygenerator
15.自定義
可同時實現介面org.hibernate.id.identifiergenerator
，org.hibernate.id.configurable
@id
@generatedvalue(generator = "gen")
@genericgenerator(name = "gen", strategy = "xg.custgenerator")
private string id;
strategy填寫具體類名
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