JBoss 在开发环境中找不到 PostgreSQL 的 JDBC 驱动程序

Question

现在，我正在做这个 EJB 教程： http://programming.manessinger.com/tutorials/an-eclipse-glassfish-java-ee-6-tutorial/#heading_toc_j_23，但是我使用 JBoss 7.0 代替 GlassFish，使用 PostgreSQL 和 Hibernate 作为持久性提供程序而不是 DerbyDB。我的问题是，我无法部署 EAR 并测试 Web 服务（这是我在教程 ATM 中的位置），因为 JBoss 给了我以下错误：

ERROR [org.jboss.msc.service.fail] (MSC service thread 1-7) MSC00001: Failed to start service jboss.persistenceunit."JEETutorialEAR.ear/JEETutorialEJB.jar#JEETutorialEJB": org.jboss.msc.service.StartException in service jboss.persistenceunit."JEETutorialEAR.ear/JEETutorialEJB.jar#JEETutorialEJB": Failed to start service
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1780) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_27]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_27]
    at java.lang.Thread.run(Thread.java:662) [:1.6.0_27]
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: JEETutorialEJB] Unable to build EntityManagerFactory
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:908)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:884)
    at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:73)
    at org.jboss.as.jpa.service.PersistenceUnitService.createContainerEntityManagerFactory(PersistenceUnitService.java:143)
    at org.jboss.as.jpa.service.PersistenceUnitService.start(PersistenceUnitService.java:77)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1824) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1759) [jboss-msc-1.0.1.GA.jar:1.0.1.GA]
    ... 3 more
Caused by: org.hibernate.HibernateException: Specified JDBC Driver org.postgresql.Driver class not found
    at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:102)
    at org.hibernate.service.internal.BasicServiceRegistryImpl.configureService(BasicServiceRegistryImpl.java:80)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:145)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:118)
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:208)
    at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:85)
    at org.hibernate.service.internal.BasicServiceRegistryImpl.configureService(BasicServiceRegistryImpl.java:80)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:145)
    at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:118)
    at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:70)
    at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2253)
    at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2249)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1720)
    at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:76)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:899)
    ... 9 more
Caused by: java.lang.ClassNotFoundException: org.postgresql.Driver from [Module "org.hibernate:main" from local module loader @624b035d (roots: C:\Users\myname\jboss-as-web-7.0.2.Final\modules)]
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:191) [jboss-modules.jar:1.0.2.GA]
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:361) [jboss-modules.jar:1.0.2.GA]
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:333) [jboss-modules.jar:1.0.2.GA]
    at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:310) [jboss-modules.jar:1.0.2.GA]
    at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:103) [jboss-modules.jar:1.0.2.GA]
    at java.lang.Class.forName0(Native Method) [:1.6.0_27]
    at java.lang.Class.forName(Class.java:169) [:1.6.0_27]
    at org.hibernate.internal.util.ReflectHelper.classForName(ReflectHelper.java:191)
    at org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:99)
    ... 23 more

我的 persistence.xml：

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/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">
    <persistence-unit name="JEETutorialEJB" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
            <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/jeetutorial"/>
            <property name="hibernate.connection.user" value="postgres"/>
            <property name="hibernate.connection.password" value="postgres"/>
            <property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
            <property name="hibernate.default_schema" value="public"/>
            <property name="hibernate.default_catalog" value="jeetutorial"/>
            <property name="hibernate.connection.username" value="postgres"/>
        </properties>
    </persistence-unit>
</persistence>

我在项目路径中添加了 PostgreSQL JDBC 驱动程序。我做到了，这里建议什么：http://jan. zawodny.pl/blog/2011/07/jboss-7-postgresql-9 没有数据源配置（我猜这是在启动服务器期间由 Eclipse 完成的）。

Answer 1

您需要手动部署驱动程序，例如在独立模式下将其复制到
$JBOSS/standalone/deployments/ 。无需将其打包为模块。

在 AS7.1 的未来版本中，将可以再次使用经典的 -ds.xml 文件来创建数据源。但这只是一条评论:)