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我想在運行時創建的EntityManager,所以我可以從config.xml中錯誤EclipseLink-4021在運行時創建EntityManager時爲什麼?
這裏設置不同的用戶名和密碼是創造了EntityManager
map.put(PersistenceUnitProperties.JDBC_USER, SystemConfig.getConfig().getString("jdbcUser"));
map.put(PersistenceUnitProperties.JDBC_PASSWORD, SystemConfig.getConfig().getString("jdbcPassword"));
map.put(PersistenceUnitProperties.JDBC_URL, SystemConfig.getConfig().getString("jdbcUrl"));
map.put(PersistenceUnitProperties.JDBC_DRIVER, "net.sourceforge.jtds.jdbc.Driver");
EntityManager eMgr = Persistence.createEntityManagerFactory("myPU", map).createEntityManager();
在UNIX我的程序結構的代碼: 〜/測試/ myProgram.jar 〜/測試/ lib目錄/ *。JAR但是(所有圖書館和了jdbc.jar這裏)
當我運行該文件夾/測試程序裏面的程序工作正常/ 當我在根目錄下運行程序〜/我得到Ex ception [EclipseLink-4021]。 任何想法爲什麼?
注意:最終我需要使用cron作業來安排程序。
[EL Info]: 2013-05-06 12:10:18.989--ServerSession(1729331687)--EclipseLink, version: Eclipse Persistence Services - 2.4.1.v20121003-ad44345
[EL Severe]: ejb: 2013-05-06 12:10:19.002--ServerSession(1729331687)--Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.4.1.v20121003-ad44345): org.eclipse.persistence.exceptions.DatabaseException
Exception Description: Unable to acquire a connection from driver [net.sourceforge.jtds.jdbc.Driver], user [null] and URL [null]. Verify that you have set the expected driver class and URL. Check your login, persistence.xml or sessions.xml resource. The jdbc.driver property should be set to a class that is compatible with your database platform
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.4.1.v20121003-ad44345): org.eclipse.persistence.exceptions.DatabaseException
Exception Description: Unable to acquire a connection from driver [net.sourceforge.jtds.jdbc.Driver], user [null] and URL [null]. Verify that you have set the expected driver class and URL. Check your login, persistence.xml or sessions.xml resource. The jdbc.driver property should be set to a class that is compatible with your database platform
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 dcsmailcheck.MailResend.<init>(MailResend.java:61)
at dcsmailcheck.Main.main(Main.java:49)
Caused by: Exception [EclipseLink-4021] (Eclipse Persistence Services - 2.4.1.v20121003-ad44345): org.eclipse.persistence.exceptions.DatabaseException
Exception Description: Unable to acquire a connection from driver [net.sourceforge.jtds.jdbc.Driver], user [null] and URL [null]. Verify that you have set the expected driver class and URL. Check your login, persistence.xml or sessions.xml resource. The jdbc.driver property should be set to a class that is compatible with your database platform
at org.eclipse.persistence.exceptions.DatabaseException.unableToAcquireConnectionFromDriverException(DatabaseException.java:376)
at org.eclipse.persistence.sessions.DefaultConnector.connect(DefaultConnector.java:91)
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:215)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:542)
... 6 more
是的,謝謝。它混淆了我在其他情況下,如果SystemConfig.getConfig()有問題,它會給出一個錯誤,「jdbcUser」或任何不可訪問或不存在等,但在上述情況下使用時,它不會提示該錯誤,而是提示EclipseLink錯誤... – codeIsFun 2013-05-08 01:20:01