在不启动Jboss或其它应用服务器的情况下运行EJB3程序

自:http://hi.baidu.com/vsandjava/blog/item/de2aa086a0a6393e66096ef7.html

EJB3(中文版) 第八集 Standalone Persistence

2006年11月03日 星期五 05:59

在不启动Jboss或其它应用服务器的情况下运行EJB3程序. Enterprise_JavaBeans_3一书中的ex05_2例子. 1.检查数据库的启动 2.注意事务类型    transaction-type="RESOURCE_LOCAL" 3.用到jboss-EJB-3.0_Embeddable_ALPHA_9包中的Jar包 4.persistence.xml文件内容 <?xml version="1.0" encoding="UTF-8"?> <persistence>     <persistence-unit name="titan" transaction-type="RESOURCE_LOCAL">         <properties>              <property name="hibernate.connection.driver_class" value="org.gjt.mm.mysql.Driver"/>              <property name="hibernate.connection.username" value="root"/>              <property name="hibernate.connection.password" value="1234"/>              <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/titan"/>              <property name="hibernate.hbm2ddl.auto" value="create-drop"/>              <property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider"/>         </properties>     </persistence-unit> </persistence> 5.强调一下Eclipse工作区的路径不能有空格. 6.这里面我们在前面已经介绍过了. 7.实际在数据库中并没有真正的创建表，也没有将数据存入表中。 易出现的异常: Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named titan at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55) at com.lyh.ejb3.clients.StandaloneClient.main(StandaloneClient.java:28) 解决方法:加入jboss-EJB-3.0_Embeddable_ALPHA_9包中的 hibernate-all.jar,jboss-ejb3-all.jar,thirdparty-all.jar三个Jar文件即可. og4j:WARN No appenders could be found for logger (org.hibernate.ejb.Version). log4j:WARN Please initialize the log4j system properly. Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.HibernateException: JDBC Driver class not found: com.mysql.jdbc.Driver at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:217) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:114) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51) at com.lyh.ejb3.clients.StandaloneClient.main(StandaloneClient.java:28) Caused by: org.hibernate.HibernateException: JDBC Driver class not found: com.mysql.jdbc.Driver at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:66) at org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124) at org.hibernate.ejb.InjectionSettingsFactory.createConnectionProvider(InjectionSettingsFactory.java:29) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1933) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1216) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:631) at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:760) at org.hibernate.ejb.Ejb3Configuration.createFactory(Ejb3Configuration.java:151) at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:205) ... 3 more Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:100) at org.hibernate.connection.DriverManagerConnectionProvider.configure(DriverManagerConnectionProvider.java:61) ... 12 more 解决方法:将Mysql数据库的驱动加入到工作区中. log4j:WARN No appenders could be found for logger (org.hibernate.ejb.Version). log4j:WARN Please initialize the log4j system properly. Exception in thread "main" javax.persistence.PersistenceException: org.hibernate.HibernateException: Hibernate Dialect must be explicitly set at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:217) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:114) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51) at com.lyh.ejb3.clients.StandaloneClient.main(StandaloneClient.java:28) Caused by: org.hibernate.HibernateException: Hibernate Dialect must be explicitly set at org.hibernate.dialect.DialectFactory.determineDialect(DialectFactory.java:57) at org.hibernate.dialect.DialectFactory.buildDialect(DialectFactory.java:39) at org.hibernate.cfg.SettingsFactory.determineDialect(SettingsFactory.java:409) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:119) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1933) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1216) at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:631) at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:760) at org.hibernate.ejb.Ejb3Configuration.createFactory(Ejb3Configuration.java:151) at org.hibernate.ejb.Ejb3Configuration.createEntityManagerFactory(Ejb3Configuration.java:205) ... 3 more 上面是没有启动数据库的情况下出现的异常. 我的联系方式: QQ:495585885 Email:liuyuhui_007@yahoo.com.cn 我的博客:http://hi.baidu.com/vsandjava 主页公布的邮箱