Spring Data：Repository类

Repository类的定义：

public interface Repository<T, ID extends Serializable> {}

1）Repository是一个空接口，标记接口
没有包含方法声明的接口

2）如果我们自己的接口没有extends Repository，运行时会报错：

org.springframework.beans.factory.NoSuchBeanDefinitionException: No
qualifying bean of type ‘com.imooc.repository.EmployeeRepository’
available

3. 添加注解能到达到不用extends Repository的功能
   @RepositoryDefinition(domainClass = Employee.class, idClass = Integer.class)

继承Repository后方法名定义

继承Repository后方法名不能随便定义，需要使用固定格式

Keyword	Sample	JPQL snippet
And	findByLastnameAndFirstname	…where x.lastname=? and x.firstname=?
Or	findByLastnameOrFirstname	…where x.lastname=? or x.firstname=?
Between	findByStartDateBetween	…where x.startDate between ? and ?
LessThan	findByAgeLessThan	…where x.age<?
GreaterThan	findByAgeGreaterThan	…where x.age>?
After	findByStartDateAfter	…where x.startDate>?
Before	findByStartDateBefore	…where x.startDate<?
isNull	findByAgeIsNull	…where x.age is null
isNotNull,NotNull	findByAge（Is）NotNull	…where x.age not null
Like	findByFirstnameLike	…where x.firstname like ?
NotLike	findByFirstnameNotLike	…where x.firstname not like ?
StartingWith	findByFirstnameStartingWith	…where x.firstname like ?(参数后加%)
EndingWith	findByFirstnameEndingWith	…where x.firstname like ?(参数前加%)
Containing	findByFirstnameContaining	…where x.firstname like ?(参数前后都加%)
OrderBy	findByAgeOrderByLastnameDesc	…where x.age=? order by x.lastname desc
Not	findByLastnameNot	…where x.lastname <> ?
In	findByAgeIn	…where x.age in ?
NotIn	findByAgeNotIn	…where x.age not in ?
TRUE	findByActiveTrue	…where x.active=true
FALSE	findByActiveFalse	…where x.active=false