注释很详细，直接上代码

项目结构

内容

父项目 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>

    <!-- 项目信息 -->
    <groupId>com.amoorzheyu</groupId>
    <artifactId>Maven_Study</artifactId>
    <version>1.0-SNAPSHOT</version>

    <!--  模块信息:子模块  -->
    <modules>
        <module>Maven_Study_1</module>
        <module>Maven_Study_2</module>
    </modules>

    <!--  父模块打包方式：pom  -->
    <packaging>pom</packaging>

    <!--  编译信息  -->
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <!--  依赖信息：会传递给子模块  -->
    <dependencies>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <version>8.3.0</version>

            <!--  排除依赖:无需版号  -->
            <exclusions>
                <exclusion>
                    <groupId>com.mysql</groupId>
                    <artifactId>protobuf:protobuf</artifactId>
                </exclusion>
            </exclusions>

            <!--  依赖范围有4种：provided、compile、runtime、test
                  provided：在编译和测试时需要，在打包时无需该依赖
                  compile：在编译、测试、打包时需要该依赖
                  runtime：在测试、打包时需要该依赖
                  test：在测试时需要该依赖
                  scope默认为compile
             -->
            <scope>provided</scope>
        </dependency>
    </dependencies>
</project>

子项目1 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>
    <parent>
        <groupId>com.amoorzheyu</groupId>
        <artifactId>Maven_Study</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>Maven_Study_1</artifactId>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

</project>