hibernate问题，贴上来

（1）hibernate警告 Could not obtain connection metadata
运行时报错如下：
2005-12-1 13:29:19 org.hibernate.connection.DriverManagerConnectionProvider configure
信息: using driver: oracle.jdbc.driver.OracleDriver at URL: jdbc:oracle:thin:@localhost:1521:icts
2005-12-1 13:29:19 org.hibernate.connection.DriverManagerConnectionProvider configure
信息: connection properties: {user=system, password=****}
2005-12-1 13:29:19 org.hibernate.cfg.SettingsFactory buildSettings
警告: Could not obtain connection metadata
java.sql.SQLException: Io 异常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=150999297)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:180)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:222)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:335)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:361)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:442)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:321)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:140)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:110)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:118)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1505)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1053)
at test.Test.insertAdmin(Test.java:31)
at test.Test.myTest(Test.java:54)
at test.Test.main(Test.java:59)
2005-12-1 13:29:19 org.hibernate.cfg.SettingsFactory buildSettings
信息: JDBC batch size: 15
......

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连接数据库有问题。检查用户名称与密码及数据库全局名称。

（2）报错：CUSTOMER is not mapped
错在这里：List list = session.createQuery("from CUSTOMER").list();
注意这里from后面对应的是类名，而不是数据库表名。
因为Customer类和表CUSTOMERS做了映射，在sql的检索中不是从数据库中取，而是从类中，这也是ORM的思想。
（3）报错：Could not bind factory to JNDI
此错误是配置文件的问题，如果hibernate配置文件有session_factory_name这个变量，<session-factory name="foo"> 会试图将一个SessionFactory实例以foo为名bind到jndi上，而有的application container不支持jndi绑定。把这个变量去掉即可。

评论

1 楼 去你姑 2010-06-29  

这个必须顶，解决问题了