maven 依赖的传递性

1.如图我们有三个项目，项目Age，项目Bge，项目Cge

2.我们使Age项目依赖到Bge项目,Bge项目依赖到Cge项目

Age项目和Bge项目分别执行命令：mvn install 打包*.jar包，且放到本地仓库中

配置项目Bge的xml

<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>com.imooc.Bge</groupId>

  <artifactId>Bge</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

  <name>Bge</name>

  <url>http://maven.apache.org</url>

  <properties>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

  </properties>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

     <dependency>

      <groupId>com.imooc.Age</groupId>

      <artifactId>Age</artifactId>

      <version>0.0.1-SNAPSHOT</version>

    </dependency>

  </dependencies>

</project>

配置项目Cge的xml

<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>com.imooc.Cge</groupId>

  <artifactId>Cge</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

  <name>Cge</name>

  <url>http://maven.apache.org</url>

  <properties>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

  </properties>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

    <dependency>

     <groupId>com.imooc.Bge</groupId>

      <artifactId>Bge</artifactId>

      <version>0.0.1-SNAPSHOT</version>

    </dependency>

  </dependencies>

</project>

发现maven依赖如下图：

证实maven的依赖拥有传递性质！

3.阻止maven的依赖性如项目Cge中，不要出现项目Age，那么我们在项目Cge中配置pom.xml如下

项目Cge的xml配置如下：

<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>com.imooc.Cge</groupId>

  <artifactId>Cge</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

  <name>Cge</name>

  <url>http://maven.apache.org</url>

  <properties>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

  </properties>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

    <dependency>

     <groupId>com.imooc.Bge</groupId>

      <artifactId>Bge</artifactId>

      <version>0.0.1-SNAPSHOT</version>

      <!-- 排除依赖 -->

   <exclusions>

           <exclusion>

            <groupId>com.imooc.Age</groupId>

          <artifactId>Age</artifactId>

           </exclusion>

   </exclusions>

    </dependency>

  </dependencies>

</project>

项目Cge编译后的效果如下：

巴特西

maven 依赖的传递性

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