SpringCloud-整体学习(一)SpringCloud简介+版本选择

学习网址：https://www.bilibili.com/video/BV18E411x7eT

SpringCloud简介：

Spring cloud是一个基于Spring Boot实现的服务治理工具包，在微服务架构中用于管理和协调服务的
微服务：就是把一个单体项目,拆分为多个微服务,每个微服务可以独立技术选型,独立开发,独立部署,独立运维.并且多个服务相互协调,相互配合,最终完成用户的价值.
Spring Cloud是一系列框架的有序集合。它利用Spring Boot的开发便利性巧妙地简化了分布式系统基础设施的开发，如服务发现注册、配置中心、消息总线、负载均衡、断路器、数据监控等，都可以用Spring Boot的开发风格做到一键启动和部署。
(https://blog.csdn.net/June_FlyingFrost/article/details/89790656)

为什么要用springcloud？

架构的演变
https://blog.csdn.net/tyyh08/article/details/83016457

五大重要组件
服务发现——Netflix Eureka
客服端负载均衡——Netflix Ribbon/Feign
服务网关——Netflix Zuul
断路器——Netflix Hystrix
分布式配置——Spring Cloud Config

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版本选择(目前暂定版本)
https://start.spring.io/actuator/info
把返回的json串，解析完成后可查看对应信息。

"spring-cloud": {
      "Finchley.M2": "Spring Boot >=2.0.0.M3 and <2.0.0.M5",
      "Finchley.M3": "Spring Boot >=2.0.0.M5 and <=2.0.0.M5",
      "Finchley.M4": "Spring Boot >=2.0.0.M6 and <=2.0.0.M6",
      "Finchley.M5": "Spring Boot >=2.0.0.M7 and <=2.0.0.M7",
      "Finchley.M6": "Spring Boot >=2.0.0.RC1 and <=2.0.0.RC1",
      "Finchley.M7": "Spring Boot >=2.0.0.RC2 and <=2.0.0.RC2",
      "Finchley.M9": "Spring Boot >=2.0.0.RELEASE and <=2.0.0.RELEASE",
      "Finchley.RC1": "Spring Boot >=2.0.1.RELEASE and <2.0.2.RELEASE",
      "Finchley.RC2": "Spring Boot >=2.0.2.RELEASE and <2.0.3.RELEASE",
      "Finchley.SR4": "Spring Boot >=2.0.3.RELEASE and <2.0.999.BUILD-SNAPSHOT",
      "Finchley.BUILD-SNAPSHOT": "Spring Boot >=2.0.999.BUILD-SNAPSHOT and <2.1.0.M3",
      "Greenwich.M1": "Spring Boot >=2.1.0.M3 and <2.1.0.RELEASE",
      "Greenwich.SR6": "Spring Boot >=2.1.0.RELEASE and <2.1.999.BUILD-SNAPSHOT",
      "Greenwich.BUILD-SNAPSHOT": "Spring Boot >=2.1.999.BUILD-SNAPSHOT and <2.2.0.M4",
      "Hoxton.SR9": "Spring Boot >=2.2.0.M4 and <2.3.7.BUILD-SNAPSHOT",
      "Hoxton.BUILD-SNAPSHOT": "Spring Boot >=2.3.7.BUILD-SNAPSHOT and <2.4.0.M1",
      "2020.0.0-M3": "Spring Boot >=2.4.0.M1 and <=2.4.0.M1",
      "2020.0.0-M4": "Spring Boot >=2.4.0.M2 and <=2.4.0-M3",
      "2020.0.0-M5": "Spring Boot >=2.4.0.M4 and <2.4.1-SNAPSHOT",
      "2020.0.0-SNAPSHOT": "Spring Boot >=2.4.1-SNAPSHOT"
    }

技术组件选择推荐

springcloud文档
https://docs.spring.io/spring-cloud/docs/Hoxton.SR9/reference/html/
springboot文档
https://docs.spring.io/spring-boot/docs/2.2.3.RELEASE/reference/htmlsingle/