父工程pom依赖结构图

<?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">

    <!--项目说明：这里作为聚合工程的父工程-->
    <groupId>com.wgd</groupId>
    <artifactId>parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <!--基本信息-->
    <description>Demo project for Spring Boot</description>
    <modelVersion>4.0.0</modelVersion>
    <name>parent</name>
    <packaging>pom</packaging>

    <!--模块说明：这里声明多个模块-->
    <modules>

    </modules>

    <!--版本号-->
    <properties>
        <Gson.version>2.8.5</Gson.version>
        <jackson.version>2.9.8</jackson.version>
    </properties>

    <!--将共有的依赖放在这里-->
    <dependencies>
       <!--GSON-->
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>${Gson.version}</version>
        </dependency>
    </dependencies>

    <!--版本说明：这里统一管理依赖的版本号-->
    <dependencyManagement>
           <!-- 统一管理Spring依赖 -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

           <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>${jackson.version}</version>
            </dependency>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>${compiler.version}</version>
                <configuration>
                    <source>${source.version}</source>
                    <target>${target.version}</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

子工程pom图

<?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>parent</artifactId>
        <groupId>com.wgd</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>common</artifactId>
    <groupId>com.wgd</groupId>
    <version>0.0.1-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
    </dependencies>
</project>