Java 从实体生成表

我正在尝试使用项目右键单击->JPA工具->从实体生成表来从EclipseJuno中的实体生成表

我使用EclipseLink作为JPA提供商 我的应用程序容器是Glassfish 4 我的数据库是嵌入glassfish derby中的数据库

我的应用程序启动时没有错误，并且我能够使用一个简单的测试bean将数据提交到数据库（因此我假设我的连接池和数据源按预期工作）

当我尝试从实体生成表时，出现以下堆栈跟踪错误：

[EL Info]: EclipseLink, version: Eclipsenter code heree Persistence Services - 2.4.0.v20120608-r11652
[EL Severe]: ejb: Local Exception Stack: 
Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.4.0.v20120608-r11652): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/__planificateur].
Internal Exception: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at org.eclipse.persistence.exceptions.ValidationException.cannotAcquireDataSource(ValidationException.java:502)
    at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:109)
    at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162)
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:685)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:213)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:542)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:186)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:278)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:304)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:282)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:85)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:76)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:63)
Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
    at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
    at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
    at javax.naming.InitialContext.lookup(Unknown Source)
    at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:103)
    ... 11 more

Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.4.0.v20120608-r11652): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/__planificateur].
Internal Exception: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:602)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:186)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:278)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:304)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:282)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:85)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:76)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:63)
Caused by: Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.4.0.v20120608-r11652): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/__planificateur].
Internal Exception: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at org.eclipse.persistence.exceptions.ValidationException.cannotAcquireDataSource(ValidationException.java:502)
    at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:109)
    at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162)
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:685)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:213)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:542)
    ... 7 more
Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
    at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
    at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
    at javax.naming.InitialContext.lookup(Unknown Source)
    at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:103)
    ... 11 more

这是我的persistence.xml

<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
             version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
    <persistence-unit name="planificateurepicerie" transaction-type="JTA">
       <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
       <jta-data-source>jdbc/__planificateur</jta-data-source>
       <class>com.whybe.pe.jpa.Ingredient</class>
       <class>com.whybe.pe.jpa.Recette</class>
       <class>com.whybe.pe.jpa.ComposantRecette</class>
       <properties>
            <property name="eclipselink.ddl-generation" value="create-tables" />
            <property name="eclipselink.ddl-generation.output-mode" value="database" />
           <property name="eclipselink.logging.level" value="FINE"/>
       </properties>
    </persistence-unit>
</persistence> 

org.eclipse.persistence.jpa.PersistenceProvider
jdbc/规划
com.whybe.pe.jpa.component
com.whybe.pe.jpa.Recette
com.whybe.pe.jpa.ComposantRecette

我还在数据库开发透视图中设置了数据库，这也很好

在glassfish控制台中，我可以成功ping连接池

关于ddl为什么不能生成

如果你需要更多的细节，让我知道

---

提前谢谢

您正在运行模式下使用

transaction type=“JTA”

作为独立应用程序。JPA在默认上下文中查找JNDI资源名称（等等，当前应用程序中没有上下文，因为它是运行模式独立应用程序）。对于该运行模式，更改为

transaction type=“LOCAL”

。e、 g:

<?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="SamplePU" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
      <property name="javax.persistence.jdbc.url" value="jdbc:derby://localhost:1527/sample"/>
      <property name="javax.persistence.jdbc.password" value="123"/>
      <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver"/>
      <property name="javax.persistence.jdbc.user" value="root"/>
      <property name="eclipselink.logging.level" value="ALL"/>
      <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
    </properties>
  </persistence-unit>
</persistence>

org.eclipse.persistence.jpa.PersistenceProvider
假的

---

但是你用的是玻璃鱼4。在服务器上运行应用程序。如果没有JDNI资源名称，则需要将其添加到JDBC资源中。更简单的方法是使用Glassfish的控制台管理。默认情况下，您可以在

http://localhost:4848

。有关这方面的更多信息，请参见。

谢谢您的回答！“作为独立应用程序运行模式”是什么意思？我将事务类型设置为JTA，因为我希望容器能够管理Metat solution works的事务，所以我将其标记为已应答。我需要找出JTA，否则我无法注入EntityManager