在我看来,maven 依赖插件在计算依赖列表时行为不当。
假设这 3 个项目:
base1:
<?xml version="1.0" encoding="UTF-8"?>
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>mygroup</groupId>
<artifactId>base1</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.3</version>
</dependency>
</dependencies>
</project>
base2:
<?xml version="1.0" encoding="UTF-8"?>
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>mygroup</groupId>
<artifactId>base2</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
</dependencies>
</project>
合并:
<?xml version="1.0" encoding="UTF-8"?>
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>mygroup</groupId>
<artifactId>combined</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>mygroup</groupId>
<artifactId>base1</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>mygroup</groupId>
<artifactId>base2</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
base1 和 base2 都依赖于 commons-lang,但每个版本都不同!
组合取决于 base1 和 base2。
打电话时mvn dependency:list
结合起来,我希望在 2.3 和 2.6 版本中看到 base1、base2 和 commons-lang,因为两者都被使用。
然而实际输出是:
[INFO] The following files have been resolved:
[INFO] commons-lang:commons-lang:jar:2.3:compile
[INFO] mygroup:base1:jar:1.0-SNAPSHOT:compile
[INFO] mygroup:base2:jar:1.0-SNAPSHOT:compile
它甚至不使用版本号最高的 common-lang,而只是使用它第一个找到的那个。
我怎样才能避免这种情况?我需要所有依赖项。