这个例外的可能原因是什么？

Question

运行java程序时出现以下错误:

Exception in thread "main" java.lang.UnsatisfiedLinkError: t2cPingDatabase
        at oracle.jdbc.driver.T2CConnection.t2cPingDatabase(Native Method)
        at oracle.jdbc.driver.T2CConnection.doPingDatabase(T2CConnection.java:503)
        at oracle.jdbc.driver.PhysicalConnection.pingDatabase(PhysicalConnection.java:4886)
        at oracle.jdbc.driver.PhysicalConnection.pingDatabase(PhysicalConnection.java:4899)
        at oracle.jdbc.pool.OracleImplicitConnectionCache.testDatabaseConnection(OracleImplicitConnectionCache.java:2174)
        at oracle.jdbc.pool.OracleImplicitConnectionCache.performPooledConnectionTask(OracleImplicitConnectionCache.java:1343)
        at oracle.jdbc.pool.OracleImplicitConnectionCache.doForEveryCachedConnection(OracleImplicitConnectionCache.java:1208)
        at oracle.jdbc.pool.OracleImplicitConnectionCache.refreshCacheConnections(OracleImplicitConnectionCache.java:1848)
        at oracle.jdbc.pool.OracleConnectionCacheManager.refreshCache(OracleConnectionCacheManager.java:480)
        at tkpjb7382521.refreshConnectionPool(tkpjb7382521.java:199)
        at tkpjb7382521.test(tkpjb7382521.java:115)
        at tkpjb7382521.run(tkpjb7382521.java:46)
        at sqlj.qa.harness.AppJdbcHarness.RunTestCase(AppJdbcHarness.java:158)
        at sqlj.qa.harness.AppJdbcHarness.main(AppJdbcHarness.java:79)

可能的原因是什么？

Answer 1

当Java无法找到jar中引用的本机方法时,会抛出此错误.所以我的猜测是你正在使用本机(OCI)Oracle JDBC驱动程序,缺少或配置不正确的Oracle客户端配置,或者你的URL不正确,或者你只是缺少tnsnames.ora文件中的条目.

最简单的解决方案可能只是使用Oracle瘦JDBC驱动程序,而不需要安装Oracle TNS客户端.