警告: SQL Error: 0, SQLState: null
2010-4-20 13:34:50 org.hibernate.util.JDBCExceptionReporter logExceptions
严重: Cannot create PoolableConnectionFactory
2010-4-20 13:34:50 org.hibernate.cfg.SettingsFactory buildSettings
警告: Could not obtain connection metadata
org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory, cause: 
java.sql.SQLException: Io 异常: The Network Adapter could not establish the connection
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)
    at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:441)
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
    at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:82)
    at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:300)
    at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:838)
    at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:821)
    at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:518)
    ..