查看“Spring Boot 依赖管理特性”的源代码

https://www.bilibili.com/video/BV19K4y1L7MT/?p=6

=== 父项目做依赖管理 ===
boot-01-helloworld - pom.xml<syntaxhighlight lang="xml">
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.4.RELEASE</version>
    </parent>
</syntaxhighlight>



spring-boot-starter-parent-2.3.4.RELEASE.pom<syntaxhighlight lang="xml">
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-dependencies</artifactId>
    <version>2.3.4.RELEASE</version>
  </parent>
  <artifactId>spring-boot-starter-parent</artifactId>
  <packaging>pom</packaging>
  <name>spring-boot-starter-parent</name>
</syntaxhighlight>


spring-boot-dependencies-2.3.4.RELEASE.pom<syntaxhighlight lang="xml">
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-dependencies</artifactId>
  <version>2.3.4.RELEASE</version>
  <packaging>pom</packaging>
  <properties>
    <activemq.version>5.15.13</activemq.version>
    <antlr2.version>2.7.7</antlr2.version>
    <appengine-sdk.version>1.9.82</appengine-sdk.version>
    <artemis.version>2.12.0</artemis.version>
  ……
  </properties>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.apache.activemq</groupId>
        <artifactId>activemq-amqp</artifactId>
        <version>${activemq.version}</version>
      </dependency>
      ……
    </dependencies>
  </dependencyManagement>

</syntaxhighlight>几乎声明了所有开发中常用依赖的版本号，自动版本仲裁机制


如果对自动仲裁的版本不满意，还可以到当前项目的配置文件里进行自定义：

# 查看 spring-boot-dependencies 里面规定当前依赖的版本用的 key。
# 在当前项目里面重写<syntaxhighlight lang="xml">
    <properties>
        <mysql.version>5.1.43</mysql.version>
    </properties>
</syntaxhighlight>


各种各样的 starter （场景启动器）

https://docs.spring.io/spring-boot/docs/2.7.8/reference/html/using.html#using.build-systems.starters


所有的场景启动器最底层的依赖<syntaxhighlight lang="xml">
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
      <version>2.3.4.RELEASE</version>
      <scope>compile</scope>
    </dependency>
</syntaxhighlight>所以一旦依赖了场景启动器，就不用才引入对 spring-boot-starter 的依赖了