七天学会SpringCloud分布式微服务——02——第一个微服务项目

1、建立springboot项目

• 这里springboot版本号随便选，其他都不要选，后面重现选springboot版本号
  

2、修改spring-cloud的pom.xml文件

2.1 去掉无关内容

<url/>
    <licenses>
        <license/>
    </licenses>
    <developers>
        <developer/>
    </developers>
    <scm>
        <connection/>
        <developerConnection/>
        <tag/>
        <url/>
    </scm>

2.2 标明为父工程

增加

 <packaging>pom</packaging>

2.3 springboot版本 3.2.0 + springcloud2023.0.3+springcloudalibaba2023.0.1.3

属性properties改为：

<properties>
		 <java.version>17</java.version>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring-cloud.version>2023.0.3</spring-cloud.version>
        <spring-cloud-alibaba.version>2023.0.1.3</spring-cloud-alibaba.version>
    </properties>

依赖管理声明版本为：

  <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>


            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

        </dependencies>
    </dependencyManagement>

去掉依赖引入，因为是父工程，在具体的子项目引入真正的依赖
去掉以下部分

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>

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

</dependencies>

完整的父工程pom.xml文件为

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <packaging>pom</packaging>

    <!--这一部分改为自己的-->
    <groupId>com.zhenbang</groupId>
    <artifactId>spring-cloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-cloud</name>
    <description>spring-cloud</description>

    <properties>
        <java.version>17</java.version>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring-cloud.version>2023.0.3</spring-cloud.version>
        <spring-cloud-alibaba.version>2023.0.1.3</spring-cloud-alibaba.version>
    </properties>


    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>


            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

        </dependencies>
    </dependencyManagement>



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

</project>

最终是这样的，删除无关文件

3、在spring-cloud项目中新建一个services模块

   <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

普通java就可以，不用选springboot,因为父工程已经已经是springboot项目了，子工程也是了，根本原因就是上面这段！！！

4、在services模块下的pom文件也要加上，因为它也不写具体代码

<packaging>pom</packaging>

可以删除services下的src

5 、在services模块下创建真正的具体微服务模块

在service-product这个具体微服务模块下的pom文件下引入真正的依赖包

   <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

6、修改service-product的微服务主函数

package com.zhenbang;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

7、配置yam文件

先在services pom文件下引入依赖

   <dependencies>
        <!-- Nacos服务发现 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
    </dependencies>

spring:
  application:
    name: service-product

  cloud:
    nacos:
      server-addr: 127.0.0.1:8848

server:
  port: 9000

前提是安装Nacos,本地运行起来!!!