Spring项目Docker打包时Maven报No goals specified错误求助

问题场景 #

我尝试使用Docker结合Maven为Spring项目构建镜像，Dockerfile与pom.xml位于项目根目录，本地通过Spring工具构建正常，但Docker环境下执行构建时出现报错。

Dockerfile内容 #

FROM maven:3.8.5-openjdk-17-slim AS BUILD
COPY src /app/src/
COPY pom.xml /app/
WORKDIR /app
RUN mvn clean package

pom.xml配置 #

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>ProyectoDiagrama</groupId>
  <artifactId>ProyectoDiagrama</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.3</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
  
  <properties>
      <java.version>17</java.version>
  </properties>
  <dependencies>
      <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
                <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>

        </dependency>
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.1-api</artifactId>
            <version>1.0.2.Final</version>
        </dependency>
        
        <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-validation</artifactId>
</dependency>

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
</dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
  </dependencies>
  
  <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>

            </plugin>
        </plugins>
    </build>
</project>

构建错误信息 #

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.187 s
[INFO] Finished at: 2023-05-02T09:56:32Z
[INFO] ------------------------------------------------------------------------
[ERROR] No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -> [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/NoGoalSpecifiedException

排查与解决方案 #

1. 检查pom.xml是否被正确复制到容器 #

• 查看项目根目录的.dockerignore文件，确保没有将pom.xml列入排除列表
• 执行Docker构建时，确认当前终端工作目录是项目根目录（与pom.xml同级），再运行docker build .
• 可在Dockerfile中添加调试命令，验证容器内是否存在pom.xml：

  FROM maven:3.8.5-openjdk-17-slim AS BUILD
  COPY src /app/src/
  COPY pom.xml /app/
  WORKDIR /app
  RUN ls -l /app  # 查看目录内容，确认pom.xml存在
  RUN mvn clean package
  

2. 明确指定Maven的pom.xml路径 #

修改Dockerfile中的RUN命令，强制指定pom.xml的路径，避免Maven找不到项目配置：

RUN mvn -f /app/pom.xml clean package

3. 验证Maven环境兼容性 #

虽然本地构建正常，但容器内Maven版本（3.8.5）与本地可能存在细微差异，可尝试更换为与本地一致的Maven镜像版本，或者添加-U参数强制更新依赖：

RUN mvn -U clean package

内容的提问来源于stack exchange，提问作者Redox