spring data jpa 支持以方法名进行查询/删除/统计。
查询的关键字为find
删除的关键字为delete/remove (>=1.7.x)
统计的关键字为count (>=1.7.x)
修改需要使用@Modifying注解
@Modifying
@Query("update User u set u.firstname = ?1 where u.lastname = ?2")
int setFixedFirstnameFor(String firstname, String lastname);
在确定查询/删除/统计后，在方法名后跟上限定关键字完成SQL中where条件的功能。
比如：
SysUser findByUsername(String username);
目前支持的限定关键字有：
Keyword Sample JPQL snippet
| And
|
findByLastnameAndFirstname
|
… where x.lastname = ?1 and x.firstname = ?2
|
| Or
|
findByLastnameOrFirstname
|
… where x.lastname = ?1 or x.firstname = ?2
|
| Is,Equals
|
findByFirstname,findByFirstnameIs,findByFirstnameEquals
|
… where x.firstname = 1?
|
| Between
|
findByStartDateBetween
|
… where x.startDate between 1? and ?2
|
| LessThan
|
findByAgeLessThan
|
… where x.age < ?1
|
| LessThanEqual
|
findByAgeLessThanEqual
|
… where x.age ⇐ ?1
|
| GreaterThan
|
findByAgeGreaterThan
|
… where x.age > ?1
|
| GreaterThanEqual
|
findByAgeGreaterThanEqual
|
… where x.age >= ?1
|
| After
|
findByStartDateAfter
|
… where x.startDate > ?1
|
| Before
|
findByStartDateBefore
|
… where x.startDate < ?1
|
| IsNull
|
findByAgeIsNull
|
… where x.age is null
|
| IsNotNull,NotNull
|
findByAge(Is)NotNull
|
… where x.age not null
|
| Like
|
findByFirstnameLike
|
… where x.firstname like ?1
|
| NotLike
|
findByFirstnameNotLike
|
… where x.firstname not like ?1
|
| StartingWith
|
findByFirstnameStartingWith
|
… where x.firstname like ?1(parameter bound with appended %)
|
| EndingWith
|
findByFirstnameEndingWith
|
… where x.firstname like ?1(parameter bound with prepended %)
|
| Containing
|
findByFirstnameContaining
|
… where x.firstname like ?1(parameter bound wrapped in%)
|
| OrderBy
|
findByAgeOrderByLastnameDesc
|
… where x.age = ?1 order by x.lastname desc
|
| Not
|
findByLastnameNot
|
… where x.lastname <> ?1
|
| In
|
findByAgeIn(Collection<Age> ages)
|
… where x.age in ?1
|
| NotIn
|
findByAgeNotIn(Collection<Age> age)
|
… where x.age not in ?1
|
| True
|
findByActiveTrue()
|
… where x.active = true
|
| False
|
findByActiveFalse()
|
… where x.active = false
|
| IgnoreCase
|
findByFirstnameIgnoreCase
|
… where UPPER(x.firstame) = UPPER(?1)
|
reference: http://docs.spring.io/spring-data/jpa/docs/1.8.1.RELEASE/reference/html/#specifications