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oracle版本：11.2.0.2
?连接方式：spring jdbctemplate连接数据库，通过ClassPathXmlApplicationContext("vodbossContext.xml")加载配置文件。
在做单元测试包如下错误：
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (违反协议)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:82)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:577)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:792)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:850)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:858)
at com.topdvte.vodsea.client.dao.VodCustDao.insert(VodCustDao.java:21)
at com.topdvte.vodsea.client.dao.VodCustDaoTest.testInsert(VodCustDaoTest.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:232)
at junit.framework.TestSuite.run(TestSuite.java:227)
at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:81)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (违反协议)
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1225)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:113)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79)
... 25 more
Caused by: java.sql.SQLException: 违反协议
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:180)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:222)
at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:944)
at oracle.jdbc.ttc7.O3log.receive2nd(O3log.java:521)
at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:262)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:307)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:442)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:321)
at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:294)
at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1247)
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1221)
... 28 more
这个问题查了大半天，对一下几点做出：
1、jdbc配置出错
2、用户密码不对
3、查看oracle错误日志，不是很会查看
4、oracle驱动版本不对
对上面的每项都做了验证，还是不对，后来重启了下eclipse，就OK了
最终确定是oracle驱动版本不对
为啥要重启后才能生效，这个问题一直没有明白，有谁知道可以告知。
总结：
错误信息提示就已经报错问题出在jdbc oracle包中，没有抓准，导致找错方向，白忙活了。
Caused by: java.sql.SQLException: 违反协议
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:180)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:222)
at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:944)
at oracle.jdbc.ttc7.O3log.receive2nd(O3log.java:521)
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原文地址：http://www.cnblogs.com/copo/p/5127385.html
