【Maven_bugs】The project main artifact does not exist

哆啦 AI 梦2024-12-30 14:28

背景：我想使用 maven-shade-plugin 打一个 fat jar 时报了标题中的错误，使用的命令是：org.apache.maven.plugins:maven-shade-plugin:shade -pl :shade-project。项目结构如下图，我想把子模块 shade-project 打成一个 fat jar：

执行命令后控制台打印如下：

Bash 复制代码 
xxx@xxxdeMacBook-Air maven-package-demo % mvn org.apache.maven.plugins:maven-shade-plugin:shade -pl :shade-project
[INFO] Scanning for projects...
[INFO] 
[INFO] ---------------------< cn.myphoenix:shade-project >---------------------
[INFO] Building shade-project 1.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[WARNING] The artifact mysql:mysql-connector-java:jar:8.0.33 has been relocated to com.mysql:mysql-connector-j:jar:8.0.33: MySQL Connector/J artifacts moved to reverse-DNS compliant Maven 2+ coordinates.
[INFO] 
[INFO] --- shade:3.6.0:shade (default-cli) @ shade-project ---
[ERROR] The project main artifact does not exist. This could have the following
[ERROR] reasons:
[ERROR] - You have invoked the goal directly from the command line. This is not
[ERROR]   supported. Please add the goal to the default lifecycle via an
[ERROR]   <execution> element in your POM and use "mvn package" to have it run.
[ERROR] - You have bound the goal to a lifecycle phase before "package". Please
[ERROR]   remove this binding from your POM such that the goal will be run in
[ERROR]   the proper phase.
[ERROR] - You removed the configuration of the maven-jar-plugin that produces the main artifact.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.229 s
[INFO] Finished at: 2024-12-24T21:38:23+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-shade-plugin:3.6.0:shade (default-cli) on project shade-project: Failed to create shaded artifact, project main artifact does not exist. -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

可以看到控制台也打印了 3 个原因，如下所示：

  • You have invoked the goal directly from the command line. This is not supported. Please add the goal to the default lifecycle via an element in your POM and use "mvn package" to have it run.
  • You have bound the goal to a lifecycle phase before "package". Please remove this binding from your POM such that the goal will be run in the proper phase.
  • You removed the configuration of the maven-jar-plugin that produces the main artifact.

总结来说，maven-shade-plugin 的 shade 插件需要借助 maven-jar-plugin 插件的 jar 目标打的 jar 包。官方还推荐了，将 shade 目标绑定到 package 及 package 以后的阶段，然后直接使用 mvn package 命令运行 shade 插件。

然后，我将 shade 目标绑定到了 package 阶段，pom 如下所示：

XML 复制代码 
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>3.6.0</version>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

执行 mvn package -pl :shade-project，但还有报错如下：

Bash 复制代码 
xxx@xxxdeMacBook-Air maven-package-demo % mvn package -pl :shade-project
[INFO] Scanning for projects...
[INFO] 
[INFO] ---------------------< cn.myphoenix:shade-project >---------------------
[INFO] Building shade-project 1.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[WARNING] The artifact mysql:mysql-connector-java:jar:8.0.33 has been relocated to com.mysql:mysql-connector-j:jar:8.0.33: MySQL Connector/J artifacts moved to reverse-DNS compliant Maven 2+ coordinates.
[INFO] 
[INFO] --- resources:3.3.1:resources (default-resources) @ shade-project ---
[INFO] Copying 0 resource from src/main/resources to target/classes
[INFO] 
[INFO] --- compiler:3.13.0:compile (default-compile) @ shade-project ---
[INFO] Recompiling the module because of changed source code.
[INFO] Compiling 1 source file with javac [debug target 8] to target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.340 s
[INFO] Finished at: 2024-12-24T21:46:59+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.13.0:compile (default-compile) on project shade-project: Compilation failure
[ERROR] No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
[ERROR] 
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

报错原因：环境没有提供编译器，可能编译过程运行在 JRE 上，而不是 JDK 上。

解决方案：https://www.cnblogs.com/wxmdevelop/p/18342861

查看 Maven 版本信息，貌似路径有些问题，如下所示，Maven 没有找到 JDK

Bash 复制代码 
xxx@xxxdeMacBook-Air ~ % mvn -v
Apache Maven 3.9.9 (8e8579a9e76f7d015ee5ec7bfcdc97d260186937)
Maven home: /Users/xxx/softwares/developer/apache-maven-3.9.9
Java version: 1.8.0_421, vendor: Oracle Corporation, runtime: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
Default locale: zh_CN, platform encoding: UTF-8
OS name: "mac os x", version: "15.1", arch: "aarch64", family: "mac"

重新配置 JDK 和 Maven 环境变量：

Bash 复制代码 
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-1.8.jdk/Contents/Home
M2_HOME=/Users/xxx/softwares/developer/apache-maven-3.9.9
PATH=$JAVA_HOME/bin:$M2_HOME/bin:$PATH
CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
export JAVA_HOME
export PATH
export CLASSPATH
export M2_HOME

再次查看 Maven 的版本信息，路径正确：

Bash 复制代码 
xxx@xxxdeMacBook-Air ~ % mvn -v
Apache Maven 3.9.9 (8e8579a9e76f7d015ee5ec7bfcdc97d260186937)
Maven home: /Users/xxx/softwares/developer/apache-maven-3.9.9
Java version: 1.8.0_421, vendor: Oracle Corporation, runtime: /Library/Java/JavaVirtualMachines/jdk-1.8.jdk/Contents/Home/jre
Default locale: zh_CN, platform encoding: UTF-8
OS name: "mac os x", version: "15.1", arch: "aarch64", family: "mac"

重新执行 mvn package -pl :shade-project，成功：

Bash 复制代码 
xxx@xxxdeMacBook-Air maven-package-demo % mvn package -pl :shade-project
[INFO] Scanning for projects...
[WARNING] 
[WARNING] Some problems were encountered while building the effective model for cn.myphoenix:shade-project:jar:1.0-SNAPSHOT
[WARNING] 'dependencies.dependency.systemPath' for cn.myphoenix:big-marketing-wheel:jar should use a variable instead of a hard-coded path /Users/xxx/desktop/big-marketing-wheel-1.0-SNAPSHOT.jar @ line 55, column 25
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING] 
[INFO] 
[INFO] ---------------------< cn.myphoenix:shade-project >---------------------
[INFO] Building shade-project 1.0-SNAPSHOT
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[WARNING] The artifact mysql:mysql-connector-java:jar:8.0.33 has been relocated to com.mysql:mysql-connector-j:jar:8.0.33: MySQL Connector/J artifacts moved to reverse-DNS compliant Maven 2+ coordinates.
[INFO] 
[INFO] --- resources:3.3.1:resources (default-resources) @ shade-project ---
[INFO] Copying 0 resource from src/main/resources to target/classes
[INFO] 
[INFO] --- compiler:3.13.0:compile (default-compile) @ shade-project ---
[INFO] Recompiling the module because of changed source code.
[INFO] Compiling 1 source file with javac [debug target 8] to target/classes
[INFO] 
[INFO] --- resources:3.3.1:testResources (default-testResources) @ shade-project ---
[INFO] skip non existing resourceDirectory /Users/xxx/Code_Workspace/IDEA_Workspace/maven_project/maven-package-demo/shade-project/src/test/resources
[INFO] 
[INFO] --- compiler:3.13.0:testCompile (default-testCompile) @ shade-project ---
[INFO] Nothing to compile - all classes are up to date.
[INFO] 
[INFO] --- surefire:3.2.5:test (default-test) @ shade-project ---
[INFO] No tests to run.
[INFO] 
[INFO] --- jar:3.4.1:jar (default-jar) @ shade-project ---
[INFO] Building jar: /Users/xxx/Code_Workspace/IDEA_Workspace/maven_project/maven-package-demo/shade-project/target/shade-project-1.0-SNAPSHOT.jar
[INFO] 
[INFO] --- shade:3.6.0:shade (default) @ shade-project ---
[INFO] Including org.mybatis:mybatis:jar:3.5.16 in the shaded jar.
[INFO] Including com.mysql:mysql-connector-j:jar:8.0.33 in the shaded jar.
[INFO] Including com.google.protobuf:protobuf-java:jar:3.21.9 in the shaded jar.
[INFO] Dependency-reduced POM written at: /Users/xxx/Code_Workspace/IDEA_Workspace/maven_project/maven-package-demo/shade-project/dependency-reduced-pom.xml
[WARNING] mybatis-3.5.16.jar, mysql-connector-j-8.0.33.jar, protobuf-java-3.21.9.jar, shade-project-1.0-SNAPSHOT.jar define 1 overlapping resource: 
[WARNING]   - META-INF/MANIFEST.MF
[WARNING] maven-shade-plugin has detected that some files are
[WARNING] present in two or more JARs. When this happens, only one
[WARNING] single version of the file is copied to the uber jar.
[WARNING] Usually this is not harmful and you can skip these warnings,
[WARNING] otherwise try to manually exclude artifacts based on
[WARNING] mvn dependency:tree -Ddetail=true and the above output.
[WARNING] See https://maven.apache.org/plugins/maven-shade-plugin/
[INFO] Replacing original artifact with shaded artifact.
[INFO] Replacing /Users/xxx/Code_Workspace/IDEA_Workspace/maven_project/maven-package-demo/shade-project/target/shade-project-1.0-SNAPSHOT.jar with /Users/xxx/Code_Workspace/IDEA_Workspace/maven_project/maven-package-demo/shade-project/target/shade-project-1.0-SNAPSHOT-shaded.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.203 s
[INFO] Finished at: 2024-12-24T22:09:13+08:00
[INFO] ------------------------------------------------------------------------
相关推荐
青木川崎10 小时前
java进阶之maven
java·开发语言·maven
Young丶18 小时前
SpringBoot Maven 项目 pom 中的 plugin 插件用法整理
spring boot·后端·maven
晚安~~21 小时前
共享充电宝系统｜Java｜SSM｜VUE｜ 前后端分离
java·开发语言·tomcat·maven
像素之间2 天前
maven的中国镜像有哪些
java·maven
帅气的人1232 天前
proto maven 编译 组件
java·maven
栗筝i2 天前
Maven 详细配置：Maven settings 配置文件的详细说明
java·maven
customer082 天前
【开源免费】基于SpringBoot+Vue.JS海滨学院班级回忆录系统（JAVA毕业设计）
java·vue.js·spring boot·后端·spring cloud·maven·intellij-idea
栗筝i2 天前
Maven 详细配置：Maven 项目 POM 文件解读
java·maven
iteye_103922 天前
Apache PDFBox添加maven依赖,pdf转成图片
pdf·maven·apache
尘浮生2 天前
Java项目实战II基于微信小程序的家庭大厨（开发文档+数据库+源码）
java·开发语言·数据库·微信小程序·小程序·maven
热门推荐
01渗透测试之SQLMAP工具详解 kali自带SQLmap解释 重点sqlmap --tamper 使用方式详解 搞完你就很nice了02半导体应用系统一些小知识收集(strip&wafer mapping,EAP&scada)03HCIA-datacom数通题库和录播视频资料04【bug记录】清除僵尸进程，释放GPU显存05新手学习VR全景需要知道的几个问题06校验 GPT-4 真实性的三个经典问题：快速区分 GPT-3.5 与 GPT-4，并提供免费测试网站07【模型压缩】 LPPN论文阅读笔记08ubuntu22.04.5本地apt源部署09优化手机性能，解决卡顿问题：关闭这3个微信开关，释放内存空间10音频——I2S TDM 模式(六)