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我遇到了 Spring JPA 关于排序和分页的问题。目前我收到此警告:

WARN [NamedQuery] (NamedQuery.java:65) - Finder method public abstract     org.springframework.data.domain.Page loc.starterkit.business.entities.application.repository.ApplicationRepository.findByNameLike(java.lang.String,org.springframework.data.domain.Pageable) 
is backed by a NamedQuery but contains a Pageable parameter! Sorting delivered via this Pageable will not be applied!

我的 JPA 接口代码如下所示:

public interface ApplicationRepository extends PagingAndSortingRepository<Application,Long>{

Page<Application> findByNameLike(String name, Pageable pageable);

}

我的实体工厂配置:

<bean id="entityManagerFactory"
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="persistenceProviderClass" value="org.hibernate.ejb.HibernatePersistence"/>
    <property name="packagesToScan" value="loc.starterkit.business"/>
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
    </property>
    <property name="persistenceUnitName" value="general" />
    <property name="jpaProperties">
      <props>
        <prop key="hibernate.dialect">${hibernate.dialect}</prop>
        <prop key="hibernate.connection.charSet">${hibernate.connection.charSet}</prop>
        <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
        <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
        <prop key="hibernate.use_sql_comments">${hibernate.use_sql_comments}</prop>
        <prop key="hibernate.jdbc.batch_size">${hibernate.jdbc.batch_size}</prop>
        <prop key="hibernate.cache.use_query_cache">${hibernate.cache.use_query_cache}</prop>
        <prop key="hibernate.cache.region.factory_class">${hibernate.cache.region.factory_class}</prop>
      </props>
    </property>
</bean>

我不知道为什么在这种情况下我不能在可分页方法中使用排序。有任何想法吗?

编辑:

我的应用实体

@Entity
@Table(name="APPLICATION")
public class Application {

@Id
@Column(name="ID")
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;

@Column(name="NAME")
private String name;

@Column(name="DESCRIPTION")
private String description;

public Application() {
    super();
}

.... (getters and setters here)

}

将 PagingAndSortingRepository 更改为 JPARepository 似乎会引发相同的警告。但是,经过一些测试,我发现这个 WARN 没有任何意义。事情似乎运作良好:

Hibernate: 
/* select
    count(*) 
from
    Application as generatedAlias0 
where
    generatedAlias0.name like :param0 */ select
        count(*) as col_0_0_ 
    from
        APPLICATION applicatio0_ 
    where
        applicatio0_.NAME like ?
Hibernate: 
/* select
    generatedAlias0 
from
    Application as generatedAlias0 
where
    generatedAlias0.name like :param0 
order by
    generatedAlias0.name asc */ select
        applicatio0_.ID as ID0_,
        applicatio0_.DESCRIPTION as DESCRIPT2_0_,
        applicatio0_.NAME as NAME0_ 
    from
        APPLICATION applicatio0_ 
    where
        applicatio0_.NAME like ? 
    order by
        applicatio0_.NAME asc limit ?

所以我认为这个 WARN 没有任何意义,但我想知道为什么要发出它

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