我已经使用 Netbeans 在 Java 中的 OSX 中创建了一个项目,并与使用 github 在 Windows 上工作的同事一起工作。
一旦他们克隆了项目,就会出现以下错误,这表明它无法使用 eclipse 连接到 derby 数据库。
Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named MovieDatabasePU
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:85)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
at moviedatabase.MovieDatabase.deleteFromDB(MovieDatabase.java:126)
at moviedatabase.MovieDatabase.main(MovieDatabase.java:48)
C:\Users\Mixalis\Documents\NetBeansProjects\Homework3\Ergasia3\nbproject\build-impl.xml:1076: The following error occurred while executing this line:
C:\Users\Mixalis\Documents\NetBeansProjects\Homework3\Ergasia3\nbproject\build-impl.xml:830: Java returned: 1
BUILD FAILED (total time: 2 seconds)
我检查了 Stack 上描述的所有类似问题,但 persistence.xml 是正确的,它位于 src/META-INF 文件夹中的 META-INF 文件夹中。
下面是持久化文件结构。
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="MovieDatabasePU" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>moviedatabase.entities.FavoriteList</class>
<class>moviedatabase.entities.Genre</class>
<class>moviedatabase.entities.Movie</class>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:derby://localhost:1527/person"/>
<property name="javax.persistence.jdbc.user" value="pli24"/>
<property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver"/>
<property name="javax.persistence.jdbc.password" value="pli24"/>
</properties>
</persistence-unit>
</persistence>
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