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父工程pom文件，主要定义了依赖的版本号

<?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>sentineldemo</artifactId><version>1.0-SNAPSHOT</version><packaging>pom</packaging><modules><module>order-service</module><module>product-service</module></modules><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version><spring-boot.version>2.7.18</spring-boot.version><spring-cloud.version>2021.0.8</spring-cloud.version><spring-cloud-alibaba.version>2021.0.5.0</spring-cloud-alibaba.version><spring-framework.version>5.3.33</spring-framework.version></properties><!-- 依赖声明--><dependencyManagement><dependencies><!-- SpringFramework的依赖配置--><dependency><groupId>org.springframework</groupId><artifactId>spring-framework-bom</artifactId><version>${spring-framework.version}</version><type>pom</type><scope>import</scope></dependency><!-- SpringCloud 微服务 --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency><!-- SpringCloud Alibaba 微服务 --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>${spring-cloud-alibaba.version}</version><type>pom</type><scope>import</scope></dependency><!-- SpringBoot 依赖配置 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>${spring-boot.version}</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><dependencies><!-- bootstrap 启动器 SpringBoot2.4之后不会默认加载bootstrap.yaml 所以要引入这个依赖 --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-bootstrap</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><configuration><source>${java.version}</source><target>${java.version}</target><encoding>${project.build.sourceEncoding}</encoding></configuration></plugin></plugins><pluginManagement><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><version>${spring-boot.version}</version><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></pluginManagement></build><repositories><repository><id>public</id><name>aliyun nexus</name><url>https://maven.aliyun.com/repository/public</url><releases><enabled>true</enabled></releases></repository></repositories><pluginRepositories><pluginRepository><id>public</id><name>aliyun nexus</name><url>https://maven.aliyun.com/repository/public</url><releases><enabled>true</enabled></releases><snapshots><enabled>false</enabled></snapshots></pluginRepository></pluginRepositories>
</project>

子工程按需引入，不再需要版本号<version>，也没有<properties>属性