flink社区活跃度这些图，老师是从哪里获取的呢？

代码编译执行命令： mvn clean package -DskipTests的时候，报错 [INFO] webapp 0.0.1-SNAPSHOT .............................. FAILURE [01:02 min] [INFO] project-03-sql 1.0-SNAPSHOT ........................ SKIPPED [INFO] recommend_backend 0.0.1-SNAPSHOT ................... SKIPPED [IN---------------------------------------------------------------------- [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 02:26 min [INFO] Finished at: 2023-02-11T16:43:42+08:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.3.3.RELEASE:repackage (repackage) on project demo-fraud-webapp: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.3.3.RELEASE:repackage failed: Unable to find a single main class from the following candidates [com.geekbang.demo.backend.Main, com.ververica.demo.backend.Main] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException [ERROR] [ERROR] After correcting the problems, you can resume the build with the command [ERROR] mvn <args> -rf :demo-fraud-webapp D:\Java_Project\flink_core\geektime-Flink>mvn --version Apache Maven 3.8.1 (05c21c65bdfed0f71a2f2ada8b84da59348c4c5d) Maven home: C:\Program Files\JetBrains\apache-maven-3.8.1\bin\.. Java version: 1.8.0_191, vendor: Oracle Corporation, runtime: C:\Program Files\Java\jdk1.8.0_191\jre Default locale: zh_CN, platform encoding: GBK OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows" D:\Java_Project\flink_core\geektime-Flink>

2022年12月份flink 已经到了1.16了 迭代挺快的