maven依赖冲突

一、短路优先

1、基本原则

A->B->C->X（jar）

A->B->X（jar）

这里会选择第2条路径

2、实例

nage依赖于bge，shanji依赖于nage

bge：

<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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd";>

  <modelVersion>4.0.0</modelVersion>

 

  <groupId>com.hongxing</groupId>

  <artifactId>hongxing-bge</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

 

  <name>hongxing-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>commons-io</groupId>

       <artifactId>commons-io</artifactId>

       <version>2.4</version>

       </dependency>

  </dependencies>

</project>

nage：

<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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd";>

  <modelVersion>4.0.0</modelVersion>

 

  <groupId>com.hongxing</groupId>

  <artifactId>hongxing-nage</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

 

  <name>hongxing-nage</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>commons-io</groupId>

       <artifactId>commons-io</artifactId>

       <version>2.0</version>

       </dependency>

     <dependency>

              <groupId>com.hongxing</groupId>

              <artifactId>hongxing-bge</artifactId>

              <version>0.0.1-SNAPSHOT</version>

    </dependency>

  </dependencies>

</project>

shanji：

<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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd";>

  <modelVersion>4.0.0</modelVersion>

 

  <groupId>com.hongxing</groupId>

  <artifactId>hongxing-shanji</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

 

  <name>hongxing-shanji</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.hongxing</groupId>

       <artifactId>hongxing-nage</artifactId>

       <version>0.0.1-SNAPSHOT</version>

    </dependency>

  </dependencies>

</project>

此时shanji依赖于2.0版本

19.png

 

二 路径相同，先声明先优先

shanji依赖于bge，shanji依赖于nage，bge和nage没有关系

bge：

<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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd";>

  <modelVersion>4.0.0</modelVersion>

 

  <groupId>com.hongxing</groupId>

  <artifactId>hongxing-bge</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

 

  <name>hongxing-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>commons-io</groupId>

       <artifactId>commons-io</artifactId>

       <version>2.4</version>

       </dependency>

  </dependencies>

</project>

nage：

<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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd";>

  <modelVersion>4.0.0</modelVersion>

 

  <groupId>com.hongxing</groupId>

  <artifactId>hongxing-nage</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

 

  <name>hongxing-nage</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>commons-io</groupId>

       <artifactId>commons-io</artifactId>

       <version>2.0</version>

       </dependency>

  </dependencies>

</project>

shanji：

<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/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd";>

  <modelVersion>4.0.0</modelVersion>

 

  <groupId>com.hongxing</groupId>

  <artifactId>hongxing-shanji</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <packaging>jar</packaging>

 

  <name>hongxing-shanji</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.hongxing</groupId>

              <artifactId>hongxing-bge</artifactId>

              <version>0.0.1-SNAPSHOT</version>

       </dependency>

    <dependency>

       <groupId>com.hongxing</groupId>

              <artifactId>hongxing-nage</artifactId>

              <version>0.0.1-SNAPSHOT</version>

        </dependency>

       

  </dependencies>

</project>

此时shanji依赖于2.4版本