Maven JAR 插件跳过生成的资源文件夹答案

【问题标题】：Maven JAR plugin skipping generated-resources folderMaven JAR 插件跳过生成的资源文件夹
【发布时间】：2017-11-09 05:31:55
【问题描述】：

我在尝试运行一个简单的 AngularJS Spring Boot 项目时遇到了一个奇怪的问题（在整理了this thread 中提到的问题之后）。以下是我的 Maven POM。我面临的问题是，虽然 Wro4j 插件能够在 generated-resources 下生成 JS/CSS 文件，尽管在 build/resources 下我提供了要打包的路径，generated-resources 下的文件没有被打包在“static”文件夹下的 JAR 中（仅出现我的自定义 JS 文件和 index.html 文件那里）。如何纠正？

    <modelVersion>4.0.0</modelVersion>
    <artifactId>spring-angularjs</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>  

    <parent>
        <groupId>org.test</groupId>
        <artifactId>my-microservice-parent</artifactId>
        <version>0.1.0-SNAPSHOT</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <wro4j.version>1.8.0</wro4j.version>
        <java.version>1.8</java.version>
        <bootstrap.version>3.3.7-1</bootstrap.version>
        <angularjs.version>1.5.9</angularjs.version>
        <jquery.version>3.1.1-1</jquery.version>
    </properties>

    <dependencies>  
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>angularjs</artifactId>
            <version>${angularjs.version}</version>
        </dependency>
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jasmine</artifactId>
            <version>2.0.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>
    </dependencies> 

    <build>
        <resources>         
            <resource>
                <directory>${project.build.directory}/generated-resources</directory>
            </resource>
            <resource>
                <directory>${project.basedir}/src/main/resources</directory>
            </resource>
        </resources>
        <plugins>           
            <plugin>
                <artifactId>maven-resources-plugin</artifactId>
                <executions>
                    <execution>
                        <!-- Serves *only* to filter the wro.xml so it can get an absolute 
                            path for the project -->
                        <id>copy-resources</id>
                        <phase>validate</phase>
                        <goals>
                            <goal>copy-resources</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${basedir}/target/wro</outputDirectory>
                            <resources>
                                <resource>
                                    <directory>src/main/wro</directory>
                                    <filtering>true</filtering>
                                </resource>
                            </resources>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>ro.isdc.wro4j</groupId>
                <artifactId>wro4j-maven-plugin</artifactId>
                <version>${wro4j.version}</version> 
                <executions>
                  <execution>
                    <phase>compile</phase>
                    <goals>
                      <goal>run</goal>
                    </goals>
                  </execution>
                </executions>
                <configuration>
                    <wroManagerFactory>ro.isdc.wro.maven.plugin.manager.factory.ConfigurableWroManagerFactory</wroManagerFactory>
                    <cssDestinationFolder>${project.build.directory}/generated-resources/static/css</cssDestinationFolder>
                    <jsDestinationFolder>${project.build.directory}/generated-resources/static/js</jsDestinationFolder>
                    <wroFile>${project.build.directory}/wro/wro.xml</wroFile>
                    <!--
                    <extraConfigFile>${basedir}/src/main/wro/wro.properties</extraConfigFile>
                    <contextFolder>${basedir}/src/main/wro</contextFolder>
                    -->
                    <extraConfigFile>${project.build.directory}/wro/wro.properties</extraConfigFile>
                    <contextFolder>${project.build.directory}/wro</contextFolder>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.webjars</groupId>
                        <artifactId>jquery</artifactId>
                        <version>${jquery.version}</version>
                    </dependency>
                    <dependency>
                        <groupId>org.webjars</groupId>
                        <artifactId>angularjs</artifactId>
                        <version>${angularjs.version}</version>
                    </dependency>
                    <dependency>
                        <groupId>org.webjars</groupId>
                        <artifactId>bootstrap</artifactId>
                        <version>${bootstrap.version}</version>
                    </dependency>
                </dependencies>
            </plugin>

            <plugin>
                <groupId>com.github.searls</groupId>
                <artifactId>jasmine-maven-plugin</artifactId>
                <version>2.0</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>test</goal>
                        </goals>
                    </execution>
                </executions>       
                <dependencies>
                    <dependency>
                        <groupId>org.webjars</groupId>
                        <artifactId>angularjs</artifactId>
                        <version>${angularjs.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

</project>

以下是 Maven 构建日志（对于 mvn clean package）：

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building spring-angularjs 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ spring-angularjs ---
[INFO] Deleting C:\projects\spring-angularjs\target
[INFO] 
[INFO] --- maven-resources-plugin:2.6:copy-resources (copy-resources) @ spring-angularjs ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 3 resources
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ spring-angularjs ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\projects\spring-angularjs\target\generated-resources
[INFO] Copying 3 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ spring-angularjs ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 3 source files to C:\projects\spring-angularjs\target\classes
[INFO] 
[INFO] --- wro4j-maven-plugin:1.8.0:run (default) @ spring-angularjs ---
[INFO] C:\projects\spring-angularjs\target/wro
[INFO] Executing the mojo: 
[INFO] Wro4j Model path: C:\projects\spring-angularjs\target\wro\wro.xml
[INFO] targetGroups: null
[INFO] minimize: true
[INFO] ignoreMissingResources: null
[INFO] parallelProcessing: false
[INFO] buildDirectory: C:\projects\spring-angularjs\target
[INFO] destinationFolder: C:\projects\spring-angularjs\target
[INFO] jsDestinationFolder: C:\projects\spring-angularjs\target\generated-resources\static\js
[INFO] cssDestinationFolder: C:\projects\spring-angularjs\target\generated-resources\static\css
[INFO] The following groups will be processed: [angular-bootstrap]
[INFO] folder: C:\projects\spring-angularjs\target\generated-resources\static\css
[INFO] processing group: angular-bootstrap.css
[WARNING] Less warnings are:
[WARNING] 10:1 Cannot link source map. Css result location is not know and could not be deduced from input less source..
[INFO] file size: angular-bootstrap.css -> 145074 bytes
[INFO] C:\projects\spring-angularjs\target\generated-resources\static\css\angular-bootstrap.css (145074 bytes)
[INFO] folder: C:\projects\spring-angularjs\target\generated-resources\static\js
[INFO] processing group: angular-bootstrap.js
[INFO] file size: angular-bootstrap.js -> 254638 bytes
[INFO] C:\projects\spring-angularjs\target\generated-resources\static\js\angular-bootstrap.js (254638 bytes)
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ spring-angularjs ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory C:\projects\spring-angularjs\src\test\resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ spring-angularjs ---
[INFO] No sources to compile
[INFO] 
[INFO] --- maven-surefire-plugin:2.18.1:test (default-test) @ spring-angularjs ---
[INFO] No tests to run.
[INFO] 
[INFO] --- jasmine-maven-plugin:2.0:test (default) @ spring-angularjs ---
[INFO] jetty-8.1.14.v20131031
[INFO] Started SelectChannelConnector@0.0.0.0:60402
[INFO] Executing Jasmine Specs
[INFO] Resolved artifact C:\Users\XXXXX\.m2\repository\com\github\klieber\phantomjs\2.0.0\phantomjs-2.0.0-windows.zip from remote-repos-vr (https://vrartifactory.eficode.com/remote-repos-vr, default, releases+snapshots)
[INFO] Extracting C:\Users\XXXXX\.m2\repository\com\github\klieber\phantomjs\2.0.0\phantomjs-2.0.0-windows.zip\phantomjs-2.0.0-windows\bin\phantomjs.exe to C:\projects\spring-angularjs\target\phantomjs\phantomjs-2.0.0-windows\bin\phantomjs.exe
[INFO] 
-------------------------------------------------------
 J A S M I N E   S P E C S
-------------------------------------------------------
[INFO] 

Results: 0 specs, 0 failures, 0 pending

[INFO] stopped o.e.j.s.h.ContextHandler{/webjars,file:/C:/projects/spring-angularjs/}
[INFO] stopped o.e.j.s.h.ContextHandler{/classpath,file:/C:/projects/spring-angularjs/}
[INFO] stopped o.e.j.s.h.ContextHandler{/,file:/C:/projects/spring-angularjs/}
[INFO] stopped o.e.j.s.h.ContextHandler{/spec,file:/C:/projects/spring-angularjs/}
[INFO] stopped o.e.j.s.h.ContextHandler{/src,file:/C:/projects/spring-angularjs/}
[INFO] 
[INFO] --- maven-jar-plugin:2.5:jar (default-jar) @ spring-angularjs ---
[INFO] Building jar: C:\projects\spring-angularjs\target\spring-angularjs-0.0.1-SNAPSHOT.jar
[INFO] 
[INFO] --- spring-boot-maven-plugin:1.3.8.RELEASE:repackage (default) @ spring-angularjs ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 32.848 s
[INFO] Finished at: 2017-11-09T16:04:39+05:30
[INFO] Final Memory: 98M/503M
[INFO] ------------------------------------------------------------------------

【问题讨论】：

您的项目似乎配置正确。您可以粘贴您的 Maven 构建日志以查看运行了哪些目标以及如何运行？这可能有助于诊断您的问题。
感谢皮埃尔通读。我编辑了我的问题以添加构建日志。感谢您的帮助。
似乎您的文件已生成。你能提供调试输出吗？添加 -X 标志：mvn clean package -X
是的，我已经在我的问题中提到“Wro4j 插件能够在生成的资源下生成 JS/CSS 文件”。但它们没有被打包在 JAR 中。
是的，调试输出将显示有关包含和排除文件夹的更多信息。

标签： angularjs spring maven spring-boot

【解决方案1】：

wro4j-maven-plugin:run 运行在compile 阶段，在process-resources 阶段之后，所有资源都复制到${project.build.outputDirectory}（默认为target/classes）。只有该文件夹中的文件包含在您的 JAR 中，但您的 CSS/JS 文件是在Maven 尝试将它们复制到 outputDirectory 之后生成的，因此永远不会被添加。

您只需配置 Wro4j 插件即可在 generate-resources 阶段运行：

       <plugin>
            <groupId>ro.isdc.wro4j</groupId>
            <artifactId>wro4j-maven-plugin</artifactId>
            <version>${wro4j.version}</version> 
            <executions>
              <execution>
                <phase>generate-resources</phase>
                <goals>
                  <goal>run</goal>
                </goals>
              </execution>
            </executions>
       ...
       </plugin>

如果由于某些原因无法在 compile 之前生成文件（可能需要编译您的代码），您将不得不使用 Maven 资源插件手动将资源添加到项目构建输出目录中之后它们是按照您在评论中所做的那样生成的 - 尽管我建议在 prepare-package 阶段使用 ${project.build.outputDirectory} 进行生成，例如：

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-resources-plugin</artifactId>
    <version>3.0.2</version>
    <execution>
        <id>copy-resources-post-compile</id>
        <phase>prepare-package</phase>
        <goals>
            <goal>copy-resources</goal>
        </goals>
        <configuration>
            <outputDirectory>${project.build.outputDirectory}</outputDir‌ector‌y>
            <resources>
                <resource>
                    <directory>${project.build.directory}/generated-res‌ources</directory>
                </resource>
            </resources>
        </configuration>
    </execution>
</plugin>

编辑：要了解有关 Maven 生命周期、阶段和目标的更多信息，请参阅 Intro to Build Lifecycle 和 this tutorial 很好地解释了事情。另请查看default bindings 以查看默认运行哪些插件，具体取决于您的包装。

【讨论】：

非常感谢 Pierre 花时间通过聊天查看所有调试日志。感激不尽！可悲的是，在 generate-resources 阶段运行 Wro4j 也不起作用（我将调查原因）。然后我在 maven-resource 插件执行中进行了更改，将阶段更改为 prepare-package 并且效果很好。再次非常感谢。如果可能的话，你能指点我一些很好的教程，在那里我可以详细了解所有 Maven 阶段吗？
乐于提供帮助，喜欢解决技术问题；）我用文档和教程编辑了我的答案。我建议您通过 Google 左右推动您的研究以获取更多信息。