JPA 方法名规则命名查询

查询关键字

-and

And 例如：findByUsernameAndPassword(String user, Striang pwd)；

-or

Or 例如：findByUsernameOrAddress(String user, String addr)；

-between

Between 例如：SalaryBetween(int max, int min)；

-"<"

LessThan 例如： findBySalaryLessThan(int max)；

-">"

GreaterThan 例如： findBySalaryGreaterThan(int min)；

-is null

IsNull 例如： findByUsernameIsNull()；

-is not null

IsNotNull NotNull 与 IsNotNull 等价 例如： findByUsernameIsNotNull()；

-like

Like 例如： findByUsernameLike(String user)；

-not like

NotLike 例如： findByUsernameNotLike(String user)；

-order by

OrderBy 例如： findByUsernameOrderByNameAsc(String user)；直接通过name正序排序

-"!="

Not 例如： findByUsernameNot(String user)；

-in

In 例如： findByUsernameIn(Collection<String> userList) ，方法的参数可以是 Collection 类型，也可以是数组或者不定长参数；

-not in

NotIn 例如： findByUsernameNotIn(Collection<String> userList) ，方法的参数可以是 Collection 类型，也可以是数组或者不定长参数；

-Top/Limit

查询方法结果的数量可以通过关键字来限制，first 或者 top都可以使用。top/first加数字可以指定要返回最大结果的大小 默认为1

     例如:

1.  
   User findFirstByOrderByLastnameAsc();
2.  
   User findTopByOrderByAgeDesc();
3.  
   Page<User> queryFirst10ByLastname(String lastname, Pageable pageable);
4.  
   Slice<User> findTop3ByLastname(String lastname, Pageable pageable);
5.  
   List<User> findFirst10ByLastname(String lastname, Sort sort);
6.  
   List<User> findTop10ByLastname(String lastname, Pageable pageable);

• 详细查询语法

关键词	示例	对应的sql片段
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> ages)	… 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)