| Package | Description | 
|---|---|
| org.springframework.util | Miscellaneous utility classes, such as String manipulation utilities,
 a Log4J configurer, and a state holder for paged lists of objects. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | AlternativeJdkIdGeneratorAn  IdGeneratorthat usesSecureRandomfor the initial seed andRandomthereafter, instead of callingUUID.randomUUID()every
 time asJdkIdGeneratordoes. | 
| class  | JdkIdGeneratorAn  IdGeneratorthat callsUUID.randomUUID(). | 
| class  | SimpleIdGeneratorA simple  IdGeneratorthat starts at 1 and increments by 1 with each call. |