1. 学习之前要知道的
springcloud 应用的技术
2. springboot 和 springcloud 的版本选型
官网介绍：https://spring.io/projects/spring-cloud/#overview
生成新的Spring Cloud项目
最简单的入门方法是访问start.spring.io，选择您的Spring Boot版本和要使用的Spring Cloud项目。生成项目时，这会将相应的Spring Cloud BOM版本添加到您的Maven / Gradle文件中。
将Spring Cloud添加到现有的Spring Boot应用程序
如果您现有的Spring Boot应用程序想要将Spring Cloud添加到该应用程序，则第一步是确定您应该使用的Spring Cloud版本。您在应用中使用的版本将取决于您使用的Spring Boot的版本
本文将使用 springboot 2.3.0.RELEASE 和 springcloud Hoxton.SR11 构建 springcloud 项目
springboot 与 springcloud 版本选择
更详细的介绍参考： https://start.spring.io/actuator/info
{
"git": {
"branch": "1e4d6a48a9df249322972d9c1c6de3d3e38db0e8",
"commit": {
"id": "1e4d6a4",
"time": "2021-05-21T13:52:17Z"
}
},
"build": {
"version": "0.0.1-SNAPSHOT",
"artifact": "start-site",
"versions": {
"spring-boot": "2.5.0",
"initializr": "0.11.0-SNAPSHOT"
},
"name": "start.spring.io website",
"time": "2021-05-21T13:53:46.862Z",
"group": "io.spring.start"
},
"bom-ranges": {
"azure": {
"2.2.4": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1",
"3.2.0": "Spring Boot >=2.3.0.M1 and <2.4.0-M1",
"3.4.0": "Spring Boot >=2.4.0.M1 and <2.5.0-M1"
},
"codecentric-spring-boot-admin": {
"2.2.4": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1",
"2.3.1": "Spring Boot >=2.3.0.M1 and <2.5.0-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 and <2.5.0-M1"
},
"solace-spring-cloud": {
"1.0.0": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1",
"1.1.1": "Spring Boot >=2.3.0.M1 and <2.4.0-M1",
"2.0.0": "Spring Boot >=2.4.0.M1 and <2.5.0-M1"
},
"spring-cloud": {
"Hoxton.SR11": "Spring Boot >=2.2.0.RELEASE and <2.3.12.BUILD-SNAPSHOT",
"Hoxton.BUILD-SNAPSHOT": "Spring Boot >=2.3.12.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": "Spring Boot >=2.4.0.M4 and <=2.4.0",
"2020.0.2": "Spring Boot >=2.4.1 and <2.5.0-M1",
"2020.0.3-SNAPSHOT": "Spring Boot >=2.4.7-SNAPSHOT"
},
"spring-cloud-alibaba": {
"2.2.1.RELEASE": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1"
},
"spring-cloud-gcp": {
"2.0.0": "Spring Boot >=2.4.0-M1 and <2.5.0-M1"
},
"spring-cloud-services": {
"2.2.6.RELEASE": "Spring Boot >=2.2.0.RELEASE and <2.3.0.RELEASE",
"2.3.0.RELEASE": "Spring Boot >=2.3.0.RELEASE and <2.4.0-M1",
"2.4.1": "Spring Boot >=2.4.0-M1 and <2.5.0-M1"
},
"spring-geode": {
"1.2.12.RELEASE": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1",
"1.3.11.RELEASE": "Spring Boot >=2.3.0.M1 and <2.4.0-M1",
"1.4.6": "Spring Boot >=2.4.0-M1 and <2.5.0-M1",
"1.5.0": "Spring Boot >=2.5.0-M1"
},
"vaadin": {
"14.6.1": "Spring Boot >=2.1.0.RELEASE and <2.5.0-M1"
},
"wavefront": {
"2.0.2": "Spring Boot >=2.1.0.RELEASE and <2.4.0-M1",
"2.1.1": "Spring Boot >=2.4.0-M1 and <2.5.0-M1",
"2.2.0-RC1": "Spring Boot >=2.5.0-M1"
}
},
"dependency-ranges": {
"native": {
"0.9.0": "Spring Boot >=2.4.3 and <2.4.4",
"0.9.1": "Spring Boot >=2.4.4 and <2.4.5",
"0.9.2": "Spring Boot >=2.4.5 and <2.5.0-M1",
"0.10.0-SNAPSHOT": "Spring Boot >=2.5.0-M1 and <2.6.0-M1"
},
"okta": {
"1.4.0": "Spring Boot >=2.2.0.RELEASE and <2.4.0-M1",
"1.5.1": "Spring Boot >=2.4.0-M1 and <2.4.1",
"2.0.1": "Spring Boot >=2.4.1 and <2.5.0-M1"
},
"mybatis": {
"2.1.4": "Spring Boot >=2.1.0.RELEASE and <2.5.0-M1"
},
"camel": {
"3.3.0": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1",
"3.5.0": "Spring Boot >=2.3.0.M1 and <2.4.0-M1",
"3.10.0": "Spring Boot >=2.4.0.M1 and <2.5.0-M1"
},
"open-service-broker": {
"3.1.1.RELEASE": "Spring Boot >=2.2.0.RELEASE and <2.3.0.M1",
"3.2.0": "Spring Boot >=2.3.0.M1 and <2.4.0-M1",
"3.3.0": "Spring Boot >=2.4.0-M1 and <2.5.0-M1"
}
}
}
3. 步骤
（1）建 module
（2）改 pom
（3）写 yml
（4）主启动类
（5）业务代码
pom.xml
<?xml version="1.0" encoding="utf-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.test.wl</groupId>
<artifactId>springcloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<modules>
<module>cloud-provider-payment8001</module>
</modules>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.0.RELEASE</version>
</parent>
<!-- 统一jar包管理 -->
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.traget>1.8</maven.compiler.traget>
<junit.version>4.12</junit.version>
<log4j.version>1.2.17</log4j.version>
<lombok.version>1.18.12</lombok.version>
<mysql.version>8.0.23</mysql.version>
<druid.verison>1.1.22</druid.verison>
<mybatis.spring.boot.version>2.1.4</mybatis.spring.boot.version>
<spring.boot.starter.web>2.3.0.RELEASE</spring.boot.starter.web>
<spring.boot.starter.jdbc>2.3.0.RELEASE</spring.boot.starter.jdbc>
<spring.boot.starter.actuator>2.3.0.RELEASE</spring.boot.starter.actuator>
<spring.boot.starter.test>2.3.0.RELEASE</spring.boot.starter.test>
<spring.boot.devtools>2.3.0.RELEASE</spring.boot.devtools>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>2.3.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Hoxton.SR11</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>2.2.1.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
<version>${spring.boot.starter.jdbc}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.verison}</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis.spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${spring.boot.starter.web}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
<version>${spring.boot.starter.actuator}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>${spring.boot.starter.test}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<version>${spring.boot.devtools}</version>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.3.0.RELEASE</version>
<configuration>
<fork>true</fork>
<addResources>true</addResources>
</configuration>
</plugin>
</plugins>
</build>
</project>
跟尚硅谷大佬（阳哥）一起学 springcloud
视频链接：https://www.bilibili.com/video/BV18E411x7eT?from=search&seid=11397380345672811627
我的项目地址：https://gitee.com/wl_projects/springcloud.git
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