说明：  本书以一个实际项目为主线，介绍云、微服务等概念以及Spring Boot和Spring Cloud等诸多Spring项目，并介绍如何将该项目一步一步地从单体架构重构成微服务架构，最终将这个项目拆分成众多微服务，让它们运行在各自的Docker容器中，实现持续集成/持续部署，并最终自动部署到云环境（亚马逊云）中。
(This book takes a real project as the main thread, introduces the concepts of cloud, micro-service, Spring Boot, Spring Cloud, and many other Spring projects, and describes how to step-by-step restructure the project from a monolithic architecture into a micro-service architecture, eventually splitting the project into a number of micro-services to run in their respective Docker containers. To achieve continuous integration / continuous deployment, and eventually automatically deploy to the cloud environment (Amazon cloud).)