Query注解及方法限制

 repository仓库

public interface PersonRepository extends Repository<Person,Integer>{

 

//根据lastName来获取对应的Person

Person getByLastName(String lastName);

 

 

//WHERE lastName LIKE ?% AND id < ?

List<Person> getByLastNameStartingWithAndIdLessThan(String lastName,Integer id);

 

//WHERE lastName LIKE %? AND id<?

List<Person> getByLastNameEndingWithAndIdLessThan(String lastName,Integer id);

 

//WHERE email IN(?,?,?) OR birth <?

List<Person> getByEmailInOrBirthLessThan(List<String> emails,Date birth);

 

//WHERE a.id>?

    List<Person> getByAddressIdCreaterThan(Integer id);

 //getByAddress_IdCreaterThan(Integer id);

  

    //查询id值最大的那个Person

    //使用@Query注解可以自定义JPQL语句以实现更灵活的查询

    @Query("SELECT p FROM Person p WHERE p.id=(SELECT max(p.id) FROM Person p2)")

    Person getMaxIdPerson();

    

    //1.@Query注解传递参数的方式1，使用占位符

    @Query("SELECT p FROM Person p WHERE p.lastName=?1 AND p,email =?2")

    List<Person> testQueryAnnotationParam1(String lastName,String email);

    

    //2.位Query注解传递参数的方式2:命名参数的方式

    @Query("SELECT p FROM Person p WHERE p.lastName= :lastName AND p.email=:email")

    List<Person> testQueryAnnotationParams2(@Param("email")String email,@Param("lastName")String lastName);

        //SpringData 允许在占位符上添加 %%. 

@Query("SELECT p FROM Person p WHERE p.lastName LIKE %?1% OR p.email LIKE %?2%")

List<Person> testQueryAnnotationLikeParam(String lastName, String email);

 

//SpringData 允许在占位符上添加 %%. 

@Query("SELECT p FROM Person p WHERE p.lastName LIKE %:lastName% OR p.email LIKE %:email%")

List<Person> testQueryAnnotationLikeParam2(@Param("email") String email, @Param("lastName") String lastName);

 

//设置 nativeQuery=true 即可以使用原生的 SQL 查询

@Query(value="SELECT count(id) FROM jpa_persons", nativeQuery=true)

long getTotalCount();

}