java ssh jdbc 链接 oracle 问题。新手弄了两天了，999
之前是链接mysql的。客户突然要改成oracle数据库。搞了两天了还没能链接成功。大家帮忙看下，知道的说下，感激不尽。
启动tomcat:
NFO: Initializing Spring root WebApplicationContext
[2013-05-14 11:27:56,265] [com.mchange.v2.async.ThreadPoolAsynchronousRunner] WARN - com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1e131e5 -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks!
[2013-05-14 11:27:56,265] [com.mchange.v2.async.ThreadPoolAsynchronousRunner] WARN - com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@1e131e5 -- APPARENT DEADLOCK!!! Complete Status:
Managed Threads: 3
Active Threads: 3
Active Tasks:
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@1252b15 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0)
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@12faccf (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1)
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@fa5f28 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2)
Pending Tasks:
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@17d7924
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@9c6ad9
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@12ae998
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@4e0d38
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@45ea27
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@fa694
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@18176ff
Pool thread stack traces:
Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0,5,main]
java.lang.Thread.sleep(Native Method)
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805)
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1,5,main]
java.lang.Thread.sleep(Native Method)
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805)
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2,5,main]
java.lang.Thread.sleep(Native Method)
com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805)
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
[2013-05-14 11:28:05,531] [com.mchange.v2.resourcepool.BasicResourcePool] WARN - com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@fa5f28 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.sql.SQLException: Io 异常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=153092352)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334)
at oracle.jdbc.ttc7.TTC7Protocol.handleIOException(TTC7Protocol.java:3649)
at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:353)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:368)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:549)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:349)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:135)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
[2013-05-14 11:28:05,546] [com.mchange.v2.resourcepool.BasicResourcePool] WARN - com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@12faccf -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.sql.SQLException: Io 异常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=153092352)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334)
at oracle.jdbc.ttc7.TTC7Protocol.handleIOException(TTC7Protocol.java:3649)
at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:353)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:368)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:549)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:349)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:135)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
[2013-05-14 11:28:05,546] [org.hibernate.util.JDBCExceptionReporter] WARN - SQL Error: 0, SQLState: null
[2013-05-14 11:28:05,546] [org.hibernate.util.JDBCExceptionReporter] ERROR - Connections could not be acquired from the underlying database!
[2013-05-14 11:28:05,546] [org.hibernate.cfg.SettingsFactory] WARN - Could not obtain connection metadata
java.sql.SQLException: Connections could not be acquired from the underlying database!
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:529)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
at org.springframework.orm.hibernate3.LocalDataSourceConnectionProvider.getConnection(LocalDataSourceConnectionProvider.java:82)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:111)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2101)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1325)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:814)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:732)
at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335)
at
在线等答复，急。 
其中jdbc.properties放在src的根目录下，那段hibernate配置文件时applicationContext中hibernate的配置的东西
