maven-dependency-plugin:解包错误

Question

我正在尝试从依赖jar文件中提取一些.exe文件,并将它们放在$ {project.build.directory}/classes /下.

但是当我执行时:

mvn clean编译依赖:unpack

我得到:

无法执行目标org.apache.maven.plugins:maven-dependency-plugin:2.10:unpack(default-cli)项目简单:需要artifact或artifactItems - > [帮助1

我已经验证了依赖项在我的本地存储库中可用.

在我的示例pom中,我使用junit作为示例,但无论我列出哪个依赖项,我都会得到相同的错误.

pom.xml中:

<build>
  <pluginManagement>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <version>2.10</version>
        <executions>
          <execution>
            <id>unpack</id>
            <phase>package</phase>
            <goals>
              <goal>unpack</goal>
            </goals>
            <configuration>
              <artifactItems>
                <artifactItem>
                  <groupId>junit</groupId>
                  <artifactId>junit</artifactId>
                  <version>4.10</version>
                  <type>jar</type>
                  <overWrite>false</overWrite>
  <outputDirectory>${project.build.directory}/classes/externaltools</outputDirectory>                   
                  <includes>**/*.txt</includes>
                </artifactItem>
              </artifactItems>   
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </pluginManagement>
</build>

Answer 1

问题是由于您无法一起使用mvn clean compile dependency:unpack和<executions>标记.

在页面底部的文档Maven Depdendency Plugin中,您可以阅读:

如果您打算使用以下命令在命令行上配置此mojo以执行:mvn dependency:unpack您不得将配置放在executions标记内.您的配置应如下所示:

<project>
  [...]
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <version>2.10</version>
        <configuration>
          <artifactItems>
            <artifactItem>
              <groupId>[ groupId ]</groupId>
              <artifactId>[ artifactId ]</artifactId>
              <version>[ version ]</version>
              <type>[ packaging ]</type>
              <classifier> [classifier - optional] </classifier>
              <overWrite>[ true or false ]</overWrite>
              <outputDirectory>[ output directory ]</outputDirectory>
              <destFileName>[ filename ]</destFileName>
              <includes>[ comma separated list of file filters ]</includes>
              <excludes>[ comma separated list of file filters ]</excludes>
            </artifactItem>
          </artifactItems>
          <!-- other configurations here -->
        </configuration>
      </plugin>
    </plugins>
  </build>
  [...]
</project>

我试过删除<execution>标签,并完美地工作!