Hibernate ORM 5.3实现了JPA 2.2标准。在接下来的几周里，我们将介绍JPA 2.2引入的各种特性。
JPA 2.2规范说明以下Java 8类型现在受到支持
-
java.time.LocalDate, -
java.time.LocalTime, -
java.time.LocalDateTime, -
java.time.OffsetTime, -
java.time.OffsetDateTime
在这篇文章中，您将看到Hibernate ORM支持所有这些类型，甚至更多
-
java.time.Duration, -
java.time.ZonedDateTime
实体映射
假设您有以下实体
@Entity(name = "DateTimeEntity")
public static class DateTimeEntity {
@Id
private Integer id;
@Column(name = "duration_value")
private Duration duration = Duration.of( 20, ChronoUnit.DAYS );
@Column(name = "instant_value")
private Instant instant = Instant.now();
@Column(name = "local_date")
private LocalDate localDate = LocalDate.now();
@Column(name = "local_date_time")
private LocalDateTime localDateTime = LocalDateTime.now();
@Column(name = "local_time")
private LocalTime localTime = LocalTime.now();
@Column(name = "offset_date_time")
private OffsetDateTime offsetDateTime = OffsetDateTime.now();
@Column(name = "offset_time")
private OffsetTime offsetTime = OffsetTime.now();
@Column(name = "zoned_date_time")
private ZonedDateTime zonedDateTime = ZonedDateTime.now();
//Getters and setters omitted for brevity
}DateTimeEntity将有一个与之关联的数据库表，如下所示
create table DateTimeEntity
(
id integer not null,
duration_value bigint,
instant_value timestamp,
local_date date,
local_date_time timestamp,
local_time time,
offset_date_time timestamp,
offset_time time,
zoned_date_time timestamp,
primary key (id)
)时间测试
当持久化一个DateTimeEntity时
final DateTimeEntity dateTimeEntity = new DateTimeEntity();
dateTimeEntity.setId( 1 );
doInHibernate(this::sessionFactory, session -> {
session.persist( dateTimeEntity );
} );Hibernate ORM生成以下SQL语句
insert into DateTimeEntity
(
duration_value,
instant_value,
local_date,
local_date_time,
local_time,
offset_date_time,
offset_time,
zoned_date_time,
id
)
values
(?, ?, ?, ?, ?, ?, ?, ?, ?)
-- binding parameter [1] as [BIGINT] - [PT480H]
-- binding parameter [2] as [TIMESTAMP] - [2018-02-20T13:52:31.333Z]
-- binding parameter [3] as [DATE] - [2018-02-20]
-- binding parameter [4] as [TIMESTAMP] - [2018-02-20T15:52:31.329]
-- binding parameter [5] as [TIME] - [15:52:31.333]
-- binding parameter [6] as [TIMESTAMP] - [2018-02-20T15:52:31.333+02:00]
-- binding parameter [7] as [TIME] - [15:52:31.333+02:00]
-- binding parameter [8] as [TIMESTAMP] - [2018-02-20T15:52:31.333+02:00[Europe/Athens]]
-- binding parameter [9] as [INTEGER] - [1]当检索实体时
DateTimeEntity _dateTimeEntity = session.find( DateTimeEntity.class, 1 );Hibernate ORM生成以下SQL语句
select
dt.id as id1_0_0_,
dt.duration_value as duration2_0_0_,
dt.instant_value as instant_3_0_0_,
dt.local_date as local_da4_0_0_,
dt.local_date_time as local_da5_0_0_,
dt.local_time as local_ti6_0_0_,
dt.offset_date_time as offset_d7_0_0_,
dt.offset_time as offset_t8_0_0_,
dt.zoned_date_time as zoned_da9_0_0_
from
DateTimeEntity dt
where
dt.id = ?
-- binding parameter [1] as [INTEGER] - [1]
-- extracted value ([duration2_0_0_] : [BIGINT]) - [PT480H]
-- extracted value ([instant_3_0_0_] : [TIMESTAMP]) - [2018-02-20T13:52:31.333Z]
-- extracted value ([local_da4_0_0_] : [DATE]) - [2018-02-20]
-- extracted value ([local_da5_0_0_] : [TIMESTAMP]) - [2018-02-20T15:52:31.329]
-- extracted value ([local_ti6_0_0_] : [TIME]) - [15:52:31]
-- extracted value ([offset_d7_0_0_] : [TIMESTAMP]) - [2018-02-20T15:52:31.333+02:00]
-- extracted value ([offset_t8_0_0_] : [TIME]) - [15:52:31+02:00]
-- extracted value ([zoned_da9_0_0_] : [TIMESTAMP]) - [2018-02-20T15:52:31.333+02:00[Europe/Athens]]
-- duration (Duration) -> 1728000000000000
-- instant (Instant) -> 2018-02-20T13:52:31.333Z
-- localDate (LocalDate) -> 2018-02-20
-- localDateTime (LocalDateTime) -> 2018-02-20 15:52:31.3
-- localTime (LocalTime) -> 15:52:31
-- offsetDateTime (OffsetDateTime) -> 2018-02-20 15:52:31.3 +02:00
-- offsetTime (OffsetTime) -> 15:52:31.0 +02:00
-- zonedDateTime (ZonedDateTime) -> 2018-02-20 15:52:31.3 Europe/Athens