1.具体报错如下：
Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project springboot-vue-demo: There are test failures.

Please refer to E:\code\projectDir\study_springboot_vue\study_springboot_vue\target\surefire-reports for the individual test results.
Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
2.分析报错内容：
从这个报错的内容可以了解到，想要得到完整的报错信息，需要到“E:\code\projectDir\study_springboot_vue\study_springboot_vue\target\surefire-reports”这个目录下的这个文件中获取，也就是下图中圈起来的文件打开文件找到报错信息：“Correct the classpath of your application so that it contains compatible versions of the classes org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration$PoolBuilderFactory and org.apache.commons.pool2.impl.GenericObjectPoolConfig
”，也就是版本不兼容
于是我就去pom.xml文件中去寻找刚添加的redis和pool依赖以及创建工程时导入的boot依赖版本，如图所示

将百度得知，版本依赖冲突，于是我就更改了springboot的依赖版本，如图所示
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.7.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent>

clean&compile后重新启动项目，正常运行
最后告诉大家，遇事不要慌，先去接杯水，慢慢百度，然后一下午就过去了