json在线格式化
https://www.bejson.com/
在线yam和properties转换
https://www.toyaml.com/index.html
maven仓库
https://mvnrepository.com/tags/maven
spring官网
https://spring.io/projects/spring-kafka#overview
springCloudAlibaba文档
https://spring-cloud-alibaba-group.github.io/github-pages/hoxton/en-us/index.html