boot与cloud版本

springboot:提供了快速开发微服务的能力
springcloud提供了微服务治理的能力（服务注册与发现、服务降级、限流、熔断、网关、负载均衡、配置中心...），为微服务开发提供了全家桶服务

springboot的版本查看地址：Spring Boot

springcloud的版本查看地址：Spring Cloud

详细版本对应信息查看：https://start.spring.io/actuator/info

SpringCloud-alibaba

Springcloud与springcloud-alibaba关系

◆ 我们通常说的SpringCloud，泛指Spring Cloud Netflix，也是springcloud第一代
◆ SpringCloud Alibaba是SpringCloud的子项目，是阿里巴巴结合自身微服务实践，
◆ SpringCloud Alibaba符合SpringCloud标准，依赖于springcloud

确定版本

确定方式：通过查看springcloud alibaba 官网确定

https://github.com/alibaba/spring-cloud-alibaba/wiki/版本说明

https://github.com/alibaba/spring-cloud-alibaba/wiki/

这里使用：

springcloud-alibaba: 2.2.5.RELEASE

springcloud: Hoxton.SR8

springboot: 2.3.2.RELEASE

创建父工程

父工程锁定springboot、springcloud、springcloud-alibaba版本

下图为示例项目模块父项目用maven项目就可以

下图是父项目的pom.xml cloud1的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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

<!--    自己的gva坐标-->
    <groupId>com.qianfeng</groupId>
    <artifactId>cloud1</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>pom</packaging>

<!--    描述哪一些子模块-->
    <modules>
        <module>goods</module>
        <module>orders</module>
        <module>commons</module>
    </modules>

<!--    表示自己父项目springboot版本-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

<!--依赖管理 描述了springcloud 和springcloudAlibaba的版本-->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.5.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Hoxton.SR8</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

        </dependencies>
    </dependencyManagement>

</project>

服务提供者

项目的goods older相当于是一个nacos客户端

goods的pom.xml

描述父项目父项目里面写上关联子项目才算关联成功

<?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>

<!--   描述父项目-->
    <parent>
        <groupId>com.qianfeng</groupId>
        <artifactId>cloud1</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <groupId>com.qianfeng</groupId>
    <artifactId>goods</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>goods</name>
    <description>goods</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <!--    web的场景依赖    -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--     端点监控的场景依赖   -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--     nacos场景依赖   -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter</artifactId>
            <scope>test</scope>

        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

下图是goods的配置文件这是一个springboot项目

spring:
  application:
    name: goods
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
        username: nacos
        password: nacos


server:
  port: 9001

下图是goods一个controller controller的包要写在goods下面访问时访问配置的9001

@RestController
@RequestMapping("/goods")
public class GoodsController {

    @RequestMapping("/getOne")
    public Goods getOne(Integer gid){

        Goods goods = new Goods(gid, "小浣熊", 1);

        return goods;
    }

}

order的pom.xml跟goods的xml一样导依赖描述父项目只是配置文件端口改为9002

commons是一个管理实体类的项目模块 pom文件如下是一个maven项目

<?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">
    <parent>
        <artifactId>cloud1</artifactId>
        <groupId>com.qianfeng</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>

    <artifactId>commons</artifactId>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

    </dependencies>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

</project>