Java 如何使用 JPA 设置 Eclipselink？
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How to setup Eclipselink with JPA?
提问by deamon
The Eclipselink documentationsays that I need the following entries in my pom.xml to get it with Maven:
该EclipseLink的文件说，我需要在我的pom.xml与Maven得到它下面的条目：
<dependencies>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.0.0</version>
<scope>compile</scope>
...
</dependency>
<dependencies>
...
<repositories>
<repository>
<id>EclipseLink Repo</id>
<url>http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/rt/eclipselink/maven.repo</url>
</repository>
...
</repositories>
But when I try to use @Entityannotation NetBeans tells me, that the class cannot be found. And indeed: there is no Entity class in the javax.persistence package from Eclipselink.
但是当我尝试使用@EntityNetBeans 告诉我的注释时，找不到该类。事实上：Eclipselink 的 javax.persistence 包中没有实体类。
How do I have to setup Eclipselink with Maven?
我必须如何使用 Maven 设置 Eclipselink？
采纳答案by Pascal Thivent
The eclipselinkartifact doesn't provide the JPA 2.0 API, you need to add javax.persistence:
该eclipselink工件不提供 JPA 2.0 API，您需要添加javax.persistence：
<repositories>
<repository>
<id>eclipselink</id>
<url>http://www.eclipse.org/downloads/download.php?r=1&nf=1&file=/rt/eclipselink/maven.repo/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.0.0</version>
<scope>provided</scope><!-- since I'm running inside a Java EE container -->
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>javax.persistence</artifactId>
<version>2.0.0</version>
<scope>provided</scope><!-- since I'm running inside a Java EE container -->
</dependency>
...
I recommend to use the non OSGI EclipseLink jar for the sake of simplicity.
为简单起见，我建议使用非 OSGI EclipseLink jar。
回答by Mykola Golubyev
You can try to add
您可以尝试添加
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>javax.persistence</artifactId>
<version>2.0.0</version>
<scope>compile</scope>
</dependency>
回答by J?rn Horstmann
When I look into my local maven repository, org.eclipse.persistence:eclipselink does indeed contain the persistence api, at least for version 2.0.0-SNAPSHOT of eclipselink.
当我查看我的本地 maven 存储库时，org.eclipse.persistence:eclipselink 确实包含持久性 api，至少对于 eclipselink 的 2.0.0-SNAPSHOT 版本。
But there is another set of dependencies in the eclipselink repository that are a bit more modularized. These are the dependencies I am using in a current project:
但是 eclipselink 存储库中还有一组更加模块化的依赖项。这些是我在当前项目中使用的依赖项：
<!-- persistence api -->
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>javax.persistence</artifactId>
<version>2.0.0</version>
<scope>provided</scope>
</dependency>
<!-- jpa implementation -->
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa</artifactId>
<version>2.0.2</version>
<scope>provided</scope>
</dependency>
Note that scope is set to provided since I deploy to glassfish which already contains eclipselink.
请注意，范围设置为提供，因为我部署到已经包含 eclipselink 的 glassfish。
回答by user454322
Just add the following to your pom.xml.
Now these artifats are in the maven repositories, so no need to add any <repository>
只需将以下内容添加到您的pom.xml.
现在这些工件都在 maven 存储库中，因此无需添加任何<repository>
<!-- JPA -->
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.5.1</version>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>javax.persistence</artifactId>
<version>2.0.0</version>
</dependency>
Or if you are using a Java EE application server use org.eclipse.persistence.jpa:org.eclipse.persistence, as it doesn't include dependecies that are already on the server.
或者，如果您使用的是 Java EE 应用程序服务器，请使用org.eclipse.persistence.jpa:org.eclipse.persistence，因为它不包括服务器上已有的依赖项。
<!-- JPA for Java EE application servers -->
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa</artifactId>
<version>2.5.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>javax.persistence</artifactId>
<version>2.0.0</version>
<scope>provided</scope>
</dependency>
