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                ### 29.3.2. Spring Data JPA倉庫 Spring Data JPA倉庫(repositories)是用來定義訪問數據的接口。根據你的方法名,JPA查詢會被自動創建,比如,一個`CityRepository`接口可能聲明一個`findAllByState(String state)`方法,用來查找給定狀態的所有城市。 對于比較復雜的查詢,你可以使用Spring Data的[`Query`](http://docs.spring.io/spring-data/jpa/docs/current/api/org/springframework/data/jpa/repository/Query.html)注解你的方法。 Spring Data倉庫通常繼承自[`Repository`](http://docs.spring.io/spring-data/commons/docs/current/api/org/springframework/data/repository/Repository.html)或[`CrudRepository`](http://docs.spring.io/spring-data/commons/docs/current/api/org/springframework/data/repository/CrudRepository.html)接口。如果你使用自動配置,Spring Boot會搜索主配置類(注解`@EnableAutoConfiguration`或`@SpringBootApplication`的類)所在包下的倉庫。 下面是典型的Spring Data倉庫: ```java package com.example.myapp.domain; import org.springframework.data.domain.*; import org.springframework.data.repository.*; public interface CityRepository extends Repository<City, Long> { Page<City> findAll(Pageable pageable); City findByNameAndCountryAllIgnoringCase(String name, String country); } ``` **注**:我們僅僅觸及了Spring Data JPA的表面,具體查看它的[參考指南](http://projects.spring.io/spring-data-jpa/)。
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