在进行Spring Cloud相关的微服务开发时，特别是尝鲜Spring Cloud的新版本时，有很多问题都是对应的Spring Boot版本不匹配导致的。我也一度比较困惑，在Spring的官网上也没看到有对应关系。

其实Spring Start给了一个查询，Spring Boot和Spring Cloud的版本对应，可以获取到Cloud适用的Boot版本范围，比如说Spring Cloud Hoxton适用的Boot版本是"Spring Boot >=2.2.0.M4 and <2.3.2.BUILD-SNAPSHOT"，这就很方便了，不至于升级的时候没把握。

查询返回的数据，格式化后如下：

{
	"git": {
		"branch": "c68416883aa87c01ec06e873c69509264d043cbe",
		"commit": {
			"id": "c684168",
			"time": "2020-06-25T07:55:52Z"
		}
	},
	"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": "2020-06-25T13:30:32.867Z",
		"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",
			"14.2.2": "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"
		}
	}
}