Cannot load driver class: oracle.jdbc.OracleDriver

错误信息

Caused by: java.lang.IllegalStateException: Cannot load driver class: oracle.jdbc.OracleDriver
	at org.springframework.util.Assert.state(Assert.java:97) ~[spring-core-5.2.9.RELEASE.jar:5.2.9.RELEASE]
	at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.determineDriverClassName(DataSourceProperties.java:223) ~[spring-boot-autoconfigure-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.initializeDataSourceBuilder(DataSourceProperties.java:175) ~[spring-boot-autoconfigure-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration.createDataSource(DataSourceConfiguration.java:43) ~[spring-boot-autoconfigure-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari.dataSource(DataSourceConfiguration.java:85) ~[spring-boot-autoconfigure-2.3.4.RELEASE.jar:2.3.4.RELEASE]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_152]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_152]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_152]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_152]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
	... 73 common frames omitted

错误截图

原因
解决Maven导入oracle驱动包失败
解决方法（2种）
一、手动导入
下载好jar包ojdbc8-19.7.0.0.jar 手动安装

mvn install:install-file -Dfile=C:\Users\Administrator\Downloads\ojdbc8-19.7.0.0.jar -DgroupId=com.oracle -DartifactId=ojdbc8 -Dversion=19.7.0.0 -Dpackaging=jar

-Dile是jar包的路径
二、替换依赖项
原依赖项报错：

<dependency>
    <groupId>com.oracle</groupId>
    <artifactId>ojdbc8</artifactId>
    <version>19.7.0.0</version>
    <scope>provided</scope>
</dependency>

使用其他依赖项替换即可：

<!-- oracle连接驱动 -->
  <dependency>
      <groupId>com.oracle.database.jdbc</groupId>
      <artifactId>ojdbc6</artifactId>
      <version>11.2.0.4</version>
  </dependency>