Maven 清洁 : excluding directory inside target from being deleted

Question

我尝试了很多变体，但无法实现此目的。一个示例(子 pom.xml):

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-clean-plugin</artifactId>
    <configuration>
        <filesets>
            <fileset>
                <directory>target</directory>
                <useDefaultExcludes>true</useDefaultExcludes>
                <excludes>
                    <exclude>myFolder</exclude>
                </excludes>
            </fileset>
        </filesets>
    </configuration>
</plugin>

Maven 总是尝试删除我的文件夹。为什么？

Answer 1

正如 @AR.3 在答案 here 中所建议的那样，clean 阶段和目标是 -

By default, it discovers and deletes the directories configured inproject.build.directory, project.build.outputDirectory,project.build.testOutputDirectory, andproject.reporting.outputDirectory.

不过，如果您想排除特定文件夹被删除，您可以按照相反的方法(一个简单的技巧)来执行以下操作 -

<plugin>
       <groupId>org.apache.maven.plugins</groupId>
       <artifactId>maven-clean-plugin</artifactId>
       <version>3.0.0</version>
       <configuration>
           <excludeDefaultDirectories>true</excludeDefaultDirectories>
           <filesets>
                <fileset>
                    <directory>target</directory>
                    <followSymlinks>false</followSymlinks>
                    <useDefaultExcludes>true</useDefaultExcludes>
                    <includes>
                          <include><!--everything other that what you want to exclude--></include>
                    </includes>
                 </fileset>
            </filesets>
        </configuration>
</plugin>

有关 similar link 中的 excludeDefaultDirectories 的更多信息-

Disables the deletion of the default output directories configured fora project. If set to true, only the files/directories selected via theparameter filesets will be deleted.

编辑

确实可以使用直接方法排除特定文件夹的删除:

<configuration>
    <excludeDefaultDirectories>true</excludeDefaultDirectories>
        <filesets>
            <fileset>
                <directory>target</directory>
                <includes>
                    <include>**</include>
                </includes>
                <excludes>
                    <exclude><!-- folder to exclude --></exclude>
                </excludes>
            </fileset>
        </filesets>
</configuration>