https://repo.spring.io/release/org/springframework/
https://repo.spring.io/release/org/springframework/boot/spring-boot/1.5.15.RELEASE/
https://repo.spring.io/release/org/springframework/boot/spring-boot-autoconfigure/1.5.15.RELEASE/
原文：https://www.cnblogs.com/xiluhua/p/9418633.html