SpringCloud和SpringBoot对应的版本选型

SpringBoot版本选择：

官网地址：https://spring.io/projects/spring-boot

 SpringBoot官方目前最新最稳定版：2.3.1，如果单独使用SpringBoot的话，建议就可以选择官方指定的最新最稳定版。

但是，如果需要和SpringCloud整合，就得看SpringCloud的版本需要适配SpringBoot的哪个版本了。

SpringCloud版本选择：

官网地址：https://spring.io/projects/spring-cloud

SpringCloud采用了 英国伦敦地铁站 的名称来命名，并由地铁站名称首字母 A-Z 一次类推的形式来发布迭代版本。例如 Angel 是第一个版本，Brixton 是第二个版本...，目前最新版本是Hoxton。

另外，当SpringCloud的发布内容积累到临界点或者一个重大BUG被解决后，会发布一个“service releases” 版本，简称 SRX 版本，比如当前的 Hoxton SR6，就是SpringCloud发布的Hoxton版本的第6个SRX版本。

一步到位选择SpringBoot版本的办法：https://spring.io/projects/spring-cloud#learn

不知道为啥，我从第一个页面看到的是Hoxton SR6版本，点进去后成了SR5版本，估计是刚发布SR6版本，对应的还没更新...

通过下面其他方式，也可以看到对应的版本信息，但是没有上面这个详细： 

在 https://spring.io/projects/spring-cloud#overview  中指定了不同的SpringCloud版本对应的SpringBoot版本：

官网建议：Hoxton版本的SpringCloud，需要对应2.2.x 版本的SpringBoot。

更详细的版本对应查看方法：

查看地址：https://start.spring.io/actuator/info

返回内容：

 这里就可以看到详细的对应关系。

{
  "git": {
    "branch": "2221108afdb26533bcbde43d88651c3a0735c92b",
    "commit": {
      "id": "2221108",
      "time": "2020-07-01T13:12:10Z"
    }
  },
  "build": {
    "version": "0.0.1-SNAPSHOT",
    "artifact": "start-site",
    "versions": {
      "spring-boot": "2.3.1.RELEASE",
      "initializr": "0.9.0.BUILD-SNAPSHOT"
    },
    "name": "start.spring.io website",
    "time": "2020-07-01T13:13:18.488Z",
    "group": "io.spring.start"
  },
  "bom-ranges": {
    "azure": {
      "2.0.10": "Spring Boot >=2.0.0.RELEASE and <2.1.0.RELEASE",
      "2.1.10": "Spring Boot >=2.1.0.RELEASE and <2.2.0.M1",
      "2.2.4": "Spring Boot >=2.2.0.M1 and <2.3.0.M1",
      "2.3.1": "Spring Boot >=2.3.0.M1"
    },
    "codecentric-spring-boot-admin": {
      "2.0.6": "Spring Boot >=2.0.0.M1 and <2.1.0.M1",
      "2.1.6": "Spring Boot >=2.1.0.M1 and <2.2.0.M1",
      "2.2.3": "Spring Boot >=2.2.0.M1"
    },
    "solace-spring-boot": {
      "1.0.0": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1",
      "1.1.0": "Spring Boot >=2.3.0.M1"
    },
    "solace-spring-cloud": {
      "1.0.0": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1"
    },
    "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 <2.1.16.BUILD-SNAPSHOT",
      "Greenwich.BUILD-SNAPSHOT": "Spring Boot >=2.1.16.BUILD-SNAPSHOT and <2.2.0.M4",
      "Hoxton.SR6": "Spring Boot >=2.2.0.M4 and <2.3.2.BUILD-SNAPSHOT",
      "Hoxton.BUILD-SNAPSHOT": "Spring Boot >=2.3.2.BUILD-SNAPSHOT and <2.4.0.M1",
      "2020.0.0-SNAPSHOT": "Spring Boot >=2.4.0.M1"
    },
    "spring-cloud-alibaba": {
      "2.2.1.RELEASE": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1"
    },
    "spring-cloud-services": {
      "2.0.3.RELEASE": "Spring Boot >=2.0.0.RELEASE and <2.1.0.RELEASE",
      "2.1.7.RELEASE": "Spring Boot >=2.1.0.RELEASE and <2.2.0.RELEASE",
      "2.2.3.RELEASE": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1"
    },
    "spring-statemachine": {
      "2.0.0.M4": "Spring Boot >=2.0.0.RC1 and <=2.0.0.RC1",
      "2.0.0.M5": "Spring Boot >=2.0.0.RC2 and <=2.0.0.RC2",
      "2.0.1.RELEASE": "Spring Boot >=2.0.0.RELEASE"
    },
    "vaadin": {
      "10.0.17": "Spring Boot >=2.0.0.M1 and <2.1.0.M1",
      "14.2.3": "Spring Boot >=2.1.0.M1 and <2.4.0-M1"
    },
    "wavefront": {
      "2.0.0-SNAPSHOT": "Spring Boot >=2.1.0.RELEASE"
    }
  },
  "dependency-ranges": {
    "okta": {
      "1.2.1": "Spring Boot >=2.1.2.RELEASE and <2.2.0.M1",
      "1.4.0": "Spring Boot >=2.2.0.M1 and <2.4.0-M1"
    },
    "mybatis": {
      "2.0.1": "Spring Boot >=2.0.0.RELEASE and <2.1.0.RELEASE",
      "2.1.3": "Spring Boot >=2.1.0.RELEASE and <2.4.0-M1"
    },
    "geode": {
      "1.2.8.RELEASE": "Spring Boot >=2.2.0.M5 and <2.3.0.M1",
      "1.3.0.RELEASE": "Spring Boot >=2.3.0.M1 and <2.4.0-M1"
    },
    "camel": {
      "2.22.4": "Spring Boot >=2.0.0.M1 and <2.1.0.M1",
      "2.25.1": "Spring Boot >=2.1.0.M1 and <2.2.0.M1",
      "3.3.0": "Spring Boot >=2.2.0.M1 and <2.3.0.M1",
      "3.4.0": "Spring Boot >=2.3.0.M1 and <2.4.0-M1"
    },
    "open-service-broker": {
      "2.1.3.RELEASE": "Spring Boot >=2.0.0.RELEASE and <2.1.0.M1",
      "3.0.4.RELEASE": "Spring Boot >=2.1.0.M1 and <2.2.0.M1",
      "3.1.1.RELEASE": "Spring Boot >=2.2.0.M1 and <2.4.0-M1"
    }
  }
}