eclipse 如何通过eclipse在JUnit测试中使用persistence.xml和hibernate.cfg.xml？
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How to use persistence.xml and hibernate.cfg.xml in JUnit tests via eclipse?
提问by fabien7474
I have been searching for an answer during quite a long time before coming here and ask this question.
My problem is very simple : I cannot run any JUnit test when using the JPA Entity Manager API. It seems that my test is not reading the persistence.xmlfile.
在来这里问这个问题之前，我一直在寻找答案很长一段时间。我的问题很简单：使用 JPA 实体管理器 API 时我无法运行任何 JUnit 测试。看来我的测试没有读取persistence.xml文件。
When I call new Configuration().configure().buildSessionFactory(), it works like a charm but an exception is thrown when calling Persistence.createEntityManagerFactory("myapp")is:
当我调用时new Configuration().configure().buildSessionFactory()，它的作用就像一个魅力，但调用时会引发异常Persistence.createEntityManagerFactory("myapp")：
javax.persistence.PersistenceException: No Persistence provider for EntityManager named myapp at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47) at com.myapp.Test01.setUpBeforeClass(Test01.java:22)
javax.persistence.PersistenceException：在 com.myapp.Test01 的 javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47) 的 javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69) 的名为 myapp 的 EntityManager 没有持久性提供程序。 setUpBeforeClass(Test01.java:22)
My JavaSE project has the following structure :
我的 JavaSE 项目具有以下结构：
myapp
++src/main/java
++com.myapp.model
++// My entity classes are here
++src/test/java
++com.myapp
++Test01.java
++src/main/resources
++hibernate.cfg.xml
++META-INF
++persistence.xml
and persistence.xmllooks like:
和persistence.xml看起来像：
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
version="2.0">
<persistence-unit name="myapp" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.ejb.cfgfile" value="hibernate.cfg.xml"></property>
</properties>
</persistence-unit>
</persistence>
Do you have any idea how to solve this issue ?
你知道如何解决这个问题吗？
Thank you very much for your help.
非常感谢您的帮助。
回答by s.froehlich
Put the configuration in src/test/resources/META-INF.
将配置放入src/test/resources/META-INF.
回答by Tom Anderson
My guess would be that org.hibernate.ejb.HibernatePersistenceis not on your classpath. That's not in the main Hibernate jar, it's in the hibernate-entitymanager or some such jar.
我的猜测是这org.hibernate.ejb.HibernatePersistence不在您的类路径中。那不是在主 Hibernate jar 中，而是在 hibernate-entitymanager 或一些此类 jar 中。
A couple of quick experiments would be to do, in the code immediately before the call to Persistence.createEntityManagerFactory():
在调用 之前的代码中，可以进行一些快速实验Persistence.createEntityManagerFactory()：
System.out.println(getClass().getResource("META-INF/persistence.xml"));
And:
和：
System.out.println(Class.forName("org.hibernate.ejb.HibernatePersistence"));
It would also be wise to check that Eclipse is copying your resources; do a Project > Clean and then look in your Eclipse build output directory to see if persistence.xml is where you expect. I have sometimes run into cases where Eclipse doesn't copy resources for some reason or other.
检查 Eclipse 是否正在复制您的资源也是明智之举；执行 Project > Clean，然后查看 Eclipse 构建输出目录，看看是否persistence.xml 是您期望的位置。我有时会遇到 Eclipse 由于某种原因不复制资源的情况。
