介绍

Spring Cloud 是一个基于 Spring Boot 实现的云应用开发工具，它为开发中的配置管理、服务发现、断路器、智能路由、微代理、控制总线、全局锁、决策竞选、分布式会话和集群状态管理等操作提供了一种简单的开发方式。

springcloud 常用组件

1.创建父工程

创建后目录

2.删除父工程的src目录

3.修改父工程的pom文件

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>org.example</groupId><artifactId>springcloud_demo</artifactId><version>1.0-SNAPSHOT</version><packaging>pom</packaging><!-- 统一售ajar包版本--><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target><junit.version>4.12</junit.version><log4j.version>1.2.17</log4j.version><lombok.version>1.16.18</lombok.version><mysql.version>5.1.47</mysql.version><druid.version>1.1.16</druid.version><mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version></properties><!----><dependencyManagement><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>2.3.12.RELEASE</version><type>pom</type><scope>import</scope></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>Hoxton.SR12</version><type>pom</type><scope>import</scope></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>2.2.8.RELEASE</version><type>pom</type><scope>import</scope></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.37</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>${druid.version}</version></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>${mybatis.spring.boot.version}</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>${lombok.version}</version></dependency></dependencies></dependencyManagement>
</project>

注意画圈 处更改

4 springcloud 版本依赖

在导入依赖版本时 尽可能参考版本，负责很可能出现依赖错误 导致无法启动

官方依赖说明

Spring Cloud Alibaba Version	Spring Cloud Version	Spring Boot Version
2.2.10-RC1*	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.9.RELEASE	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.8.RELEASE	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.7.RELEASE	Spring Cloud Hoxton.SR12	2.3.12.RELEASE
2.2.6.RELEASE	Spring Cloud Hoxton.SR9	2.3.2.RELEASE
2.2.1.RELEASE	Spring Cloud Hoxton.SR3	2.2.5.RELEASE
2.2.0.RELEASE	Spring Cloud Hoxton.RELEASE	2.2.X.RELEASE
2.1.4.RELEASE	Spring Cloud Greenwich.SR6	2.1.13.RELEASE
2.1.2.RELEASE	Spring Cloud Greenwich	2.1.X.RELEASE
2.0.4.RELEASE(停止维护，建议升级)	Spring Cloud Finchley	2.0.X.RELEASE
1.5.1.RELEASE(停止维护，建议升级)	Spring Cloud Edgware	1.5.X.RELEASE

5.创建子模块

父工程->右击->new->module
选择maven创建，注意图片画圈位置

修改子项目的pom 文件，注意引入 <parent> 模块

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><!--注意此处--><parent><artifactId>springcloud_demo</artifactId><groupId>org.example</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>cloud_provider</artifactId><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties>
<!--只引入了web 依赖 根据需求自己引入--><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency></dependencies>
</project>

查看父工程依赖 idae 自动添加了 modules 标签

6 子项目下创建启动类

启动项目即可

@SpringBootApplication
public class ProviderApplication {public static void main(String[] args) {SpringApplication.run(ProviderApplication.class, args);}
}