org.springframework.jdbc.support.MetaDataAccessException: JDBC DatabaseMetaData method not implemented by JDBC driver - upgrade your driver; nested exception is java.lang.AbstractMethodError: oracle.jdbc.driver.T4CConnection.isValid(I)Z at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:334) ~[spring-jdbc-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.jdbc.support.JdbcUtils.extractDatabaseMetaData(JdbcUtils.java:356) ~[spring-jdbc-5.1.9.RELEASE.jar:5.1.9.RELEASE] ... ... Caused by: java.lang.AbstractMethodError: oracle.jdbc.driver.T4CConnection.isValid(I)Z at com.zaxxer.hikari.pool.PoolBase.checkDriverSupport(PoolBase.java:454) ~[HikariCP-3.2.0.jar:na] at com.zaxxer.hikari.pool.PoolBase.setupConnection(PoolBase.java:421) ~[HikariCP-3.2.0.jar:na] ... ... ...
解决办法:
把数据库驱动改一下,我用的JDK1.8 依赖用的是<artifactId>ojdbc14</artifactId> ,改为 <artifactId>ojdbc8</artifactId> 就可以了
原文：https://www.cnblogs.com/taopanfeng/p/11319377.html