Maven需要下载解压并添加到classpath，如果不明可以参考https://www.cnblogs.com/xiandedanteng/p/11403480.html
然后在命令行窗口执行：
mvn install:install-file -Dfile=D:jarsojdbc6.jar -DgroupId=com.oracle -DartifactId=ojdbc6 -Dversion=11.2.0.3 -Dpackaging=jar -DgeneratePom=true
上面粗体就是我本机上ojdbc6.jar的全路径名，大家要拿下去执行请务必记得修改。
执行效果如下：
C:Usershorn1>mvn install:install-file -Dfile=D:jarsojdbc6.jar -DgroupId=com.oracle -DartifactId=ojdbc6 -Dversion=11.2.0.3 -Dpackaging=jar -DgeneratePom=true [INFO] Scanning for projects... Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom (3.9 kB at 467 B/s) Downloading from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-install-plugin/2.4/maven-install-plugin-2.4.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-install-plugin/2.4/maven-install-plugin-2.4.pom (6.4 kB at 2.4 kB/s) [INFO] [INFO] ------------------< org.apache.maven:standalone-pom >------------------- [INFO] Building Maven Stub Project (No POM) 1 [INFO] --------------------------------[ pom ]--------------------------------- [INFO] [INFO] --- maven-install-plugin:2.4:install-file (default-cli) @ standalone-pom --- Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-utils/3.0.5/plexus-utils-3.0.5.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-utils/3.0.5/plexus-utils-3.0.5.pom (2.5 kB at 1.5 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus/3.1/plexus-3.1.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus/3.1/plexus-3.1.pom (19 kB at 4.9 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-digest/1.0/plexus-digest-1.0.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-digest/1.0/plexus-digest-1.0.pom (1.1 kB at 1.5 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-components/1.1.7/plexus-components-1.1.7.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-components/1.1.7/plexus-components-1.1.7.pom (5.0 kB at 1.9 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus/1.0.8/plexus-1.0.8.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus/1.0.8/plexus-1.0.8.pom (7.2 kB at 1.3 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-container-default/1.0-alpha-8/plexus-container-default-1.0-alpha-8.pom Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-container-default/1.0-alpha-8/plexus-container-default-1.0-alpha-8.pom (7.3 kB at 3.1 kB/s) Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-utils/3.0.5/plexus-utils-3.0.5.jar Downloading from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-digest/1.0/plexus-digest-1.0.jar Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-digest/1.0/plexus-digest-1.0.jar (12 kB at 10.0 kB/s) Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-utils/3.0.5/plexus-utils-3.0.5.jar (230 kB at 14 kB/s) [INFO] Installing D:jarsojdbc6.jar to C:Usershorn1.m2 epositorycomoracleojdbc611.2.0.3ojdbc6-11.2.0.3.jar [INFO] Installing C:Usershorn1AppDataLocalTempmvninstall120007549088651343.pom to C:Usershorn1.m2 epositorycomoracleojdbc611.2.0.3ojdbc6-11.2.0.3.pom [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 48.504 s [INFO] Finished at: 2019-11-10T12:47:51+08:00 [INFO] ------------------------------------------------------------------------
看到Build Success就表示成功了。如果是Build failed也不要着急，隔天说不定就好了。昨天我的机器上就加载不进去，今天就莫名其妙好了。
成功后本地maven库是这样的：
之后在pom.xml中这样配就行了。
<dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>11.2.0.3</version> </dependency>
最后在Eclipse里验证一下：
如果这一步还不成功，那么按以前的办法加载外部jar包也行。
最后感谢以下两位小伙伴的网文：
https://www.cnblogs.com/zhuwenjoyce/p/10923547.html
https://blog.csdn.net/qq_38263715/article/details/80698499
--END-- 2019年11月10日12:57:52