1. Spring Data Jpa keyword
Keywords action include: get / find (query), delete (delete), count (statistical number), back can increase the conditions
such as:
// 根据姓名查找用户
User findByName(String name);
// 根据性别统计用户人数
int countByGender(String gender);
// 根据userId删除用户
void deleteByUserId(Long userId);
After the keyword of conditions can increase
| Keyword | Examples | The same function JPQL |
|---|---|---|
| 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 (plus following the argument%) |
| EndingWith | findByFirstnameEndingWith | where x.firstname like? 1 (plus front parameter%) |
| Containing | findByFirstnameContaining | where x.firstname like? 1 (% plus on both sides of parameters) |
| OrderBy | findByAgeOrderByLastnameDesc | where x.age = ?1 order by x.lastname desc |
| Not | findByLastnameNot | where x.lastname <> ?1 |
| In | findByAgeIn(Collection ages) | where x.age in ?1 |
| NotIn | findByAgeNotIn(Collection 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) |