解决springboot oracle本地运行没问题，部署线上报 java.lang.ClassNotFoundException: oracle.jdbc.OracleDriver

1. 问题原因

由于线上使用的19c版本的oracle数据库，升级客户端程序后报错(优快云)，根据报错提示后将程序中的oracle6替换为oracle8后报此错误！

2. 报错提示

ERROR com.alibaba.druid.pool.DruidDataSource:905 - {dataSource-2} init error
java.sql.SQLException: oracle.jdbc.OracleDriver
    at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:600)
    at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:817)
    at com.baomidou.dynamic.datasource.DynamicDataSourceCreator.createDruidDataSource(DynamicDataSourceCreator.java:288)
    at com.baomidou.dynamic.datasource.DynamicDataSourceCreator.createDataSource(DynamicDataSourceCreator.java:154)
    at com.baomidou.dynamic.datasource.provider.AbstractDataSourceProvider.createDataSourceMap(AbstractDataSourceProvider.java:42)
    at com.baomidou.dynamic.datasource.provider.YmlDynamicDataSourceProvider.loadDataSources(YmlDynamicDataSourceProvider.java:47)
    at com.baomidou.dynamic.datasource.DynamicRoutingDataSource.afterPropertiesSet(DynamicRoutingDataSource.java:205)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1855)

Caused by: java.sql.SQLException: oracle.jdbc.OracleDriver
    at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:600)
    at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:817)
    at com.baomidou.dynamic.datasource.DynamicDataSourceCreator.createDruidDataSource(DynamicDataSourceCreator.java:288)
    ... 68 common frames omitted

3. 解决办法

在jdk 下面的 jre/lib/ext 里面放入oracle jar包 即可解决