Maven 如何将依赖项中的特定文件夹复制到 target/classes/myfolder

Question

我有依赖：

<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>swagger-ui</artifactId>
    <version>2.1.4</version>
</dependency>

内招摇-ui-2.1.4.jar有META-INF/resources/webjars/.
我想将 webjars/ 文件夹复制到 target/classes/myfolder

我已阅读 this question 并执行以下操作：

<plugin>
    <artifactId>maven-dependency-plugin</artifactId>
    <executions>
        <execution>
            <phase>install</phase>
            <goals>
                <goal>copy-dependencies</goal>
            </goals>
            <configuration>
                <includeGroupIds>org.webjars</includeGroupIds>
                <includeArtifactIds>swagger-ui</includeArtifactIds>
                <outputDirectory>${project.build.directory}/classes/myfolder</outputDirectory>
            </configuration>
        </execution>
    </executions>
</plugin>

但是它将 swagger-ui-2.1.4.jar 复制到 outputDirectory，这并不是我所需要的。

问题：有没有可能的解决方案？

Answer 1

您很可能不需要 copy-dependencies 但 unpack. Check the official example 了解更多详情。

下面的例子：

<plugin>
    <artifactId>maven-dependency-plugin</artifactId>
    <version>2.10</version>
    <executions>
        <execution>
            <phase>install</phase>
            <goals>
                <goal>unpack</goal>
            </goals>
            <configuration>
                <artifactItems>
                    <artifactItem>
                        <groupId>org.webjars</groupId>
                        <artifactId>swagger-ui</artifactId>
                        <version>2.1.4</version>
                        <type>jar</type>
                        <overWrite>false</overWrite>
                        <outputDirectory>${project.build.directory}/classes/myfolder</outputDirectory>
                        <includes>META-INF/resources/**/*.*</includes>
                    </artifactItem>
                </artifactItems>
            </configuration>
        </execution>
    </executions>
</plugin>

将在 ${project.build.directory}/classes/myfolder 下复制 META-INF/resources 的内容，基本上是 webjars 文件夹。但是，您还将获得 META-INF/resources 树结构。

为了准确实现您的意图（仅将依赖项的子文件夹内容复制到某个文件夹），您需要使用两个插件：maven-dependency-plugin 和 maven-resources-plugin，如下所示：

<plugin>
    <artifactId>maven-dependency-plugin</artifactId>
    <version>2.10</version>
    <executions>
        <execution>
            <phase>install</phase>
            <goals>
                <goal>unpack</goal>
            </goals>
            <configuration>
                <artifactItems>
                    <artifactItem>
                        <groupId>org.webjars</groupId>
                        <artifactId>swagger-ui</artifactId>
                        <version>2.1.4</version>
                        <type>jar</type>
                        <overWrite>false</overWrite>
                        <outputDirectory>${project.build.directory}/tmp</outputDirectory>
                        <includes>META-INF/resources/**/*.*</includes>
                    </artifactItem>
                </artifactItems>
            </configuration>
        </execution>
    </executions>
</plugin>
<plugin>
    <artifactId>maven-resources-plugin</artifactId>
    <version>3.0.1</version>
    <executions>
        <execution>
            <id>copy-resources</id>
            <!-- here the phase you need -->
            <phase>install</phase>
            <goals>
                <goal>copy-resources</goal>
            </goals>
            <configuration>
                <outputDirectory>${project.build.directory}/classes/myfolder</outputDirectory>
                <resources>
                    <resource>
                        <directory>${project.build.directory}/tmp/META-INF/resources</directory>
                    </resource>
                </resources>
            </configuration>
        </execution>
    </executions>
</plugin>

maven-dependency-plugin 会将我们想要的目录树复制到 target\tmp 文件夹，然后 maven-resources-plugin 只会将我们想要的子文件夹复制到最终目录。

请注意，这两个插件都将在 install 阶段执行，但它们的声明顺序对于获得最终期望的结果非常重要。

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