Java Persistence API 2.0 (JSR-317)专家指南

需积分: 10 93 浏览量更新于2024-07-22 收藏 3.68MB PDF 举报

Java Persistence API (JPA) 2.0 是 JSR 317 规范的最终版本，于2009年11月10日发布。这个英文手册由Java Persistence 2.0 Expert Group主导，由Linda De Michiel代表Sun Microsystems担任规格化领导。用户可以通过邮件jsr-317-feedback@sun.com提交对该规范的评论。 JPA 2.0是Java平台上的一个核心组件，用于简化对象关系映射（ORM）过程，使得开发者能够更方便地在Java应用程序中与数据库交互。该规范的主要目标是提供一个统一的编程接口，以便在不同的数据库管理系统（DBMS）之间实现数据持久化，减少了对特定数据库API的依赖。在JPA 2.0的Final Release中，用户可以获取到以下关键特性： 1. **非独家许可**：Sun Microsystems提供了全面的、非转让的、全球范围内的有限许可，允许用户在内部评估目的下查看、下载、使用和复制该规范。这意味着开发人员可以在不直接实现规范任何部分的前提下，使用它来构建运行在JPA实现上的应用程序。 2. **应用程序开发**：JPA 2.0旨在促进应用程序开发，特别是那些在不同数据库上运行的应用，通过提供一致的API，比如Entity（实体）、EntityManager（实体管理器）、Query（查询）等核心概念，使得开发者能以面向对象的方式操作数据库。 3. **移植性和兼容性**：该规范的发布确保了跨数据库的兼容性，允许开发者编写一次代码，即可在多种数据库系统中运行，降低了技术栈复杂性。 4. **生命周期管理**：JPA 2.0定义了对象的完整生命周期，包括创建、修改、删除（CRUD）操作以及事务管理，使得数据一致性在分布式环境中易于维护。 5. **性能优化**：随着规范的迭代，JPA 2.0注重了性能提升，例如懒加载策略、延迟加载和缓存机制，以提高应用的响应速度。 6. **标准支持**：作为JSR 317的一部分，JPA 2.0遵循Java社区的标准开发流程，确保了与其他Java技术的协同工作，并且随着Java EE框架的发展而同步更新。 7. **文档和资源**：手册中详细阐述了如何配置、使用和调试JPA，包括实体映射（Entity Mapping）、查询语言（JPQL）以及高级特性如乐观锁和分页。 JPA 2.0英文手册提供了丰富的开发指南和技术细节，帮助Java开发者高效地实现对象关系映射，降低数据库操作的复杂性，并确保应用程序在多数据库环境中的稳健运行。通过遵循这一规范，开发人员可以利用JPA的强大功能构建可维护和高性能的企业级应用。

Java Persistence 2.0, Final Release

11/10/09 16

Sun Microsystems, Inc.

Java Persistence 2.0, Final Release

17 11/10/09

Sun Microsystems, Inc.

List of Tables

Table 1 Definition of the AND Operator ...........................................................................................................169

Table 2 Definition of the OR Operator ..............................................................................................................169

Table 3 Definition of the NOT Operator............................................................................................................169

Table 4 Access Annotation Elements.................................................................................................................356

Table 5 AssociationOverride Annotation Elements...........................................................................................357

Table 6 AssociationOverrides Annotation Elements .........................................................................................359

Table 7 AttributeOverride Annotation Elements ...............................................................................................360

Table 8 AttributeOverrides Annotation Elements..............................................................................................362

Table 9 Basic Annotation Elements ...................................................................................................................364

Table 10 Cacheable Annotation Elements ...........................................................................................................364

Table 11 CollectionTable Annotation Elements ..................................................................................................365

Table 12 Column Annotation Elements ...............................................................................................................367

Table 13 DiscriminatorColumn Annotation Elements.........................................................................................369

Table 14 DiscriminatorValue Annotation Elements.............................................................................................370

Table 15 ElementCollection Annotation Elements ..............................................................................................371

Table 16 Enumerated Annotation Elements.........................................................................................................375

Table 17 GeneratedValue Annotation Elements ..................................................................................................376

Table 18 IdClass Annotation Elements ................................................................................................................377

Table 19 Inheritance Annotation Elements ..........................................................................................................378

Table 20 JoinColumn Annotation Elements ........................................................................................................380

Table 21 JoinColumns Annotation Elements.......................................................................................................382

Table 22 JoinTable Annotation Elements ............................................................................................................383

Table 23 ManyToMany Annotation Elements .....................................................................................................385

Table 24 ManyToOne Annotation Elements........................................................................................................387

Table 25 MapKey Annotation Elements..............................................................................................................389

Table 26 MapKeyClass Annotation Elements .....................................................................................................390

Table 27 MapKeyColumn Annotation Elements .................................................................................................392

Table 28 MapKeyEnumerated Annotation Elements...........................................................................................394

Table 29 MapKeyJoinColumn Annotation Elements ..........................................................................................395

Table 30 MapKeyJoinColumns Annotation Elements.........................................................................................397

Table 31 MapKeyTemporal Annotation Elements...............................................................................................397

Table 32 MapsId Annotation Elements................................................................................................................398

Table 33 OneToMany Annotation Elements........................................................................................................400

Table 34 OneToOne Annotation Elements ..........................................................................................................402

Table 35 OrderBy Annotation Elements ..............................................................................................................405

Table 36 OrderColumn Annotation Elements......................................................................................................407

Table 37 PrimaryKeyJoinColumn Annotation Elements.....................................................................................409

Table 38 PrimaryKeyJoinColumns Annotation Elements ...................................................................................410

Table 39 SecondaryTable Annotation Elements .................................................................................................. 411

Table 40 SecondaryTables Annotation Elements.................................................................................................412

Table 41 SequenceGenerator Annotation Elements.............................................................................................414

19 11/10/09

Java Persistence 2.0, Final Release

Sun Microsystems, Inc.

Chapter 1 Introduction

This document is the specification of the Java API for the management of persistence and object/rela-

tional mapping with Java EE and Java SE. The technical objective of this work is to provide an

object/relational mapping facility for the Java application developer using a Java domain model to man-

age a relational database.

The Java Persistence 2.0 specification addresses improvements in the areas of domain mod-

eling, object/relational mapping, EntityManager and Query interfaces, and the Java Persis-

tence query language. It adds an API for criteria queries, a metamodel API, and support for

validation.

1.1 Expert Group

This work is being conducted as part of JSR 317 under the Java Community Process Program. This

specification is the result of the collaborative work of the past and present members of the JSR 317

Expert Group: Adobe Systems Inc.: Jeff Vroom; akquinet tech@Spree: Michael Bouschen; DataDirect:

Eric Samson; Ericsson AB: Erik Brakkee; IBM: Kevin Sutter, Pinaki Poddar; Inria: Florent Benoit; Ora-

cle: Michael Keith, Gordon Yorke, Patrick Linskey; Pramati Technologies: Deepak Anupalli; Red Hat,

Inc.: Gavin King, Emmanuel Bernard; SAP AG: Rainer Schweigkoffer, Adrian Goerler; SpringSource

Inc.: Matthew Adams; Sun Microsystems: Linda DeMichiel (Specification Lead), Kenneth Saks;

Sybase: Evan Ireland; Tmax Soft Inc.: Wonseok Kim, Eu-gene Chung; Adam Bien; Antonio Goncalves;

Chris Maki.

1.2 Document Conventions

The regular Times font is used for information that is prescriptive by this specification.

The italic Times font is used for paragraphs that contain descriptive information, such as notes describ-

ing typical use, or notes clarifying the text with prescriptive specification.

The Courier font is used for code examples.

The Helvetica font is used to specify the BNF of the Java Persistence query language.

This document is written in terms of the use of Java language metadata annotations. An XML descriptor

(as specified in Chapter 12) may be used as an alternative to annotations or to augment or override

annotations. The elements of this descriptor mirror the annotations and have the same semantics. When

semantic requirements are written in terms of annotations, it should be understood that the same seman-

tics apply when the XML descriptor is used as an alternative.

剩余485页未读，继续阅读

sher12

粉丝: 1
资源: 9

Java Persistence API 2.0 (JSR-317)专家指南

jpa2.0(JSR-317) 规范 包含javadoc

spring2.0中文手册及使用指南 chm

Spring2.0技术手册

Spring2.0学习手册

spring 2.0 技术手册

Spring 2.0 技术手册

spring2.0技术手册

spring2.0中文手册

spring2.0技术手册源码

Spring2.0技术手册.pdf

最新资源

jpa2.0(JSR-317) 规范包含javadoc