如何使用Spring Data JPA保留JSR-310类型？

时间：2015-04-08 14:26:17

标签： jpa java-8 spring-data spring-data-jpa java-time

我正在尝试将Spring Data JPA 1.8与Java 8 Date / Time API JSR-310一起使用。

一切似乎都有效，直到我尝试将所有车辆放在两个LocalDateTimes之间。 返回的实体数量似乎只与它应该的数量松散相关。

实体

@Repository
public interface VehicleRepository extends JpaRepository<Vehicle, Long> {

    List<Vehicle> findByDateTimeBetween(LocalDateTime begin, LocalDateTime end);

}

存储库

@Entity
@Table(name = "VEHICLE")
public class Vehicle implements Serializable {

  private static final long serialVersionUID = 1L;

  @Id
  @Column(name = "IDX", nullable = false, unique = true)
  @GeneratedValue(strategy = GenerationType.AUTO)
  private long vehicleId;

  @Column(name = "DATE_TIME", nullable = false)
  private LocalDateTime dateTime = LocalDateTime.now();

  // Getters and Setters

}

相关依赖

    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-jpa</artifactId>
        <version>1.8.0.RELEASE</version>
    </dependency>
    <dependency> 
        <groupId>org.springframework</groupId> 
        <artifactId>spring-aspects</artifactId> 
        <version>4.0.9.RELEASE</version> 
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.3.8.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>4.3.8.Final</version>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <version>1.4.186</version>
    </dependency>
    <dependency>
        <groupId>com.zaxxer</groupId>
        <artifactId>HikariCP</artifactId>
        <version>2.3.5</version>
    </dependency>

失败的测试示例

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath*:applicationContextTesting.xml"})
@Transactional
public class VehicleRepositoryTest {

    @Autowired
    private VehicleRepository vehicleRepository;

    @Test
    public void testVehicleBetween() {
        // Given
        Vehicle vehicleMarch1Twelve = new Vehicle();
        Vehicle vehicleMarch1Eighteen = new Vehicle();
        Vehicle vehicleMarch2Five = new Vehicle();
        Vehicle vehicleMarch2Six = new Vehicle();
        LocalDateTime march1Twelve = LocalDateTime.of(2015, Month.MARCH, 1, 12, 0);
        LocalDateTime march1Eighteen = LocalDateTime.of(2015, Month.MARCH, 1, 18, 0);
        LocalDateTime march2Five = LocalDateTime.of(2015, Month.MARCH, 2, 5, 0);
        LocalDateTime march2Six = LocalDateTime.of(2015, Month.MARCH, 2, 6, 0);
        vehicleMarch1Twelve.setDateTime(march1Twelve);
        vehicleMarch1Eighteen.setDateTime(march1Eighteen);
        vehicleMarch2Five.setDateTime(march2Five);
        vehicleMarch2Six.setDateTime(march2Six);

        vehicleRepository.save(vehicleMarch1Twelve);
        vehicleRepository.save(vehicleMarch1Eighteen);
        vehicleRepository.save(vehicleMarch2Five);
        vehicleRepository.save(vehicleMarch2Six);
        vehicleRepository.flush();

        // when
        List<Vehicle> allVehicles = vehicleRepository.findByDateTimeBetween(
            march1Twelve,
            march2Six);
        List<Vehicle> allVehicles2 = vehicleRepository.findByDateTimeBetween(
            march1Twelve.minusMinutes(2),
            march2Six.plusMinutes(2));
        List<Vehicle> threeVehicles = vehicleRepository.findByDateTimeBetween(
            march1Twelve.plusMinutes(2),
            march2Six);
        List<Vehicle> twoVehicles = vehicleRepository.findByDateTimeBetween(
            march1Twelve.plusMinutes(2),
            march2Six.minusMinutes(2));
        List<Vehicle> oneVehicles = vehicleRepository.findByDateTimeBetween(
            march1Twelve.plusMinutes(2),
            march2Six.minusHours(3));

        // then
        Assert.assertTrue("size was " + allVehicles.size(), allVehicles.size() == 4);
        Assert.assertTrue("size was " + allVehicles2.size(), allVehicles2.size() == 4);
        Assert.assertTrue("size was " + threeVehicles.size(), threeVehicles.size() == 3);
        Assert.assertTrue("size was " + twoVehicles.size(), twoVehicles.size() == 2);
        Assert.assertTrue("size was " + oneVehicles.size(), oneVehicles.size() == 1);
        Assert.assertTrue(oneVehicles.get(0).getDateTime().equals(march1Eighteen));
    }

}

第一个List包含2个元素（应该是4个）。所有其他列表包含 0 元素！ 鉴于第二个请求的时间跨度比第一个要大。

有人能告诉我我做错了吗？

修改

感谢@Oliver Gierke快速回答。 我能够通过添加＆＃34; org.springframework.data.jpa.convert.threeten＆＃34;来解决这个问题。到packagesToScan属性。现在它似乎正常工作。

这里的参考是我工作的数据库相关（测试）配置。

<bean id="hikariConfig" class="com.zaxxer.hikari.HikariConfig">
    <property name="driverClassName" value="org.h2.Driver"/>
    <property name="jdbcUrl" value="jdbc:h2:mem:testing"/>
    <property name="username" value="interface"/>
    <property name="password" value=""/>
    <property name="connectionTestQuery" value="SELECT 1" />
</bean>

<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource">
    <constructor-arg index="0" ref="hikariConfig"/>
</bean>

<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>

<tx:annotation-driven/>

<bean id="hibernateJpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter"/>
    <property name="packagesToScan" value="com.company.project.domain,org.springframework.data.jpa.convert.threeten"/>
    <property name="jpaProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.H2Dialect</prop>
            <prop key="hibernate.hbm2ddl.auto">update</prop>
        </props>
    </property>
</bean>

<jpa:repositories base-package="com.company.project.dao" transaction-manager-ref="transactionManager"
                  entity-manager-factory-ref="entityManagerFactory"/>

3 个答案:

答案 0 :(得分：48)

更新：如果您需要保持Hibernate版本，则以下答案有效。 5.0。 Hibernate 5.0支持开箱即用的持久化JSR-310日期/时间类型。即如果您使用的是Hibernate 5.0或更高版本，Adam's answer是可行的方法。其他人，请继续阅读。

根本原因在于，没有一个广泛使用的JPA提供程序实际上支持开箱即用的JSR-310类型。但是，从Spring Data JPA 1.8.0开始，我们发布了JPA 2.0转换器，它将非时区划分的JSR-310类型转换为遗留Date，以便它们可以保持原样。

要实现此功能，只需将org.springframework.data.jpa.convert.threeten.Jsr310JpaConverters注册为您的提供商的托管JPA类之一。有几种方法可以做到这一点：在非常标准的JPA设置中，您可以在persistence.xml中列出它。在基于LocalContainerEntityManagerFactoryBean的设置中，您只需将类的包添加到packagesToScan属性即可。如果您正在使用Spring Boot，那么将类添加到@EntityScan注释就可以了。

后者在blog post中有更详细的描述，涵盖了Spring数据发布列车Fowler发布的新功能

答案 1 :(得分：34)

When using Hibernate >=5.0, <5.2, you can drop in

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-java8</artifactId>
    <version>${hibernate.version}</version>
</dependency>

on your classpath which will automatically register Types corresponding to the JSR310 classes.

(Thanks @AbhijitSarkar) Since 5.2, "the hibernate-java8 module has been merged into hibernate-core and the Java 8 date/time types are now natively supported." (Migration Guide 5.2)

答案 2 :(得分：21)

我花了很长时间才弄清楚如何在我的JPA实体中使用LocalDateTime。我是最新的Spring启动版本。并在ConversionServices中调试了很多。

Oliver Gierkes的回答帮助我完成了最后的工作设置：

将Spring-data-jpa 1.8.0或更高版本添加到依赖关系管理 

compile("org.springframework.data:spring-data-jpa:1.8.2.RELEASE")

为Jsr310JpaConverters +（至少）启用@EntityScan您的Application.class 

@EntityScan(
  basePackageClasses = { Application.class, Jsr310JpaConverters.class }
)
@SpringBootApplication
class Application { … }
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