Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:209)
at oracle.net.nt.ConnOption.connect(ConnOption.java:123)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:353)
... 18 more
[DEBUG][com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.(BasicResourcePool.java:1794)]-Continuing acquisition series. pending_acquires [3], attempts_remaining: 26
[DEBUG][com.mchange.v2.async.ThreadPoolAsynchronousRunner.postRunnable(ThreadPoolAsynchronousRunner.java:236)]-com.mchange.v2.async.ThreadPoolAsynchronousRunner@1649ef3: Adding task to queue -- com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@1409410
[DEBUG][com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.(BasicResourcePool.java:1794)]-Continuing acquisition series. pending_acquires [3], attempts_remaining: 26
[DEBUG][com.mchange.v2.async.ThreadPoolAsynchronousRunner.postRunnable(ThreadPoolAsynchronousRunner.java:236)]-com.mchange.v2.async.ThreadPoolAsynchronousRunner@1649ef3: Adding task to queue -- com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@18fa481
[DEBUG][com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.(BasicResourcePool.java:1794)]-Continuing acquisition series. pending_acquires [3], attempts_remaining: 26
[DEBUG][com.mchange.v2.async.ThreadPoolAsynchronousRunner.postRunnable(ThreadPoolAsynchronousRunner.java:236)]-com.mchange.v2.async.ThreadPoolAsynchronousRunner@1649ef3: Adding task to queue -- com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@1b16d6c
[DEBUG][com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1898)]-An exception occurred while acquiring a poolable resource. Will retry.
java.sql.SQLRecoverableException: IO 错误: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:419)
at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:536)
at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:228)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:521)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:146)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:195)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:184)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:200)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1086)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1073)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:44)
at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:648)
导入无法使用的原因有很多
java.net.ConnectException: Connection refused: connect。
该异常发生在客户端进行new Socket(ip, port)操作时，该异常发生的原因是或者具有ip地址的机器不能找到（也就是说从当前机器不存在到指定ip路由），或者是该ip存在，但找不到指定的端口进行监听。出现该问题，首先检查客户端的ip和port是否写错了，如果正确则从客户端ping一下服务器看是否能ping通，如果能ping通（服务服务器端把ping禁掉则需要另外的办法），则看在服务器端的监听指定端口的程序是否启动。
这是解释 那么如此看来 是否你的某些配置文件没有改从而导致实际访问路径是有问题的从而无法访问
我猜应该是你的数据库和你导入的项目的数据库的配置不一样导致的
看下你的dataSource中的数据库连接url，应该是这个配置有问题