如何从POM自动同步版本至Dockerfile，避免手动更新？

我有一个部署在Docker容器中的Java应用，每次发布新版本时都需要手动更新Dockerfile中的应用版本号，请问是否可以直接从POM文件中获取版本号来实现自动化？

原Dockerfile内容 #

FROM openjdk:17
COPY target/projectName-x.x.x.jar app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

POM文件内容 #

<?xml version="1.0" encoding="UTF-8"?>
<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>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>3.1.5</version>
    <relativePath/> 
</parent>
<groupId>com.groupName</groupId>
<artifactId>projectArtifactId</artifactId>
<version>x.x.x-SNAPSHOT</version>
<name>projectName</name>
<properties>
    <java.version>17</java.version>
</properties>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-rest</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-configuration-processor</artifactId>
        <optional>true</optional>
    </dependency>

    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot</artifactId>
        <version>3.1.5</version>
    </dependency>

</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <image>
                    <builder>paketobuildpacks/builder-jammy-base:latest</builder>
                </image>
                <excludes>
                    <exclude>
                        <groupId>org.projectlombok</groupId>
                        <artifactId>lombok</artifactId>
                    </exclude>
                </excludes>
            </configuration>
        </plugin>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jar-plugin</artifactId>
            <version>3.3.0</version>
            <configuration>
                <archive>
                    <manifest>
                        <mainClass>it.ivannotarstefano.ultimateserver.UltimateServerApplication</mainClass>
                    </manifest>
                </archive>
            </configuration>
        </plugin>
    </plugins>
</build>

解决方案 #

通过在Dockerfile中使用通配符*匹配jar包版本号，无需手动修改版本号即可实现自动化构建：

FROM openjdk:17
COPY target/projectName-*.jar app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

说明 #

Maven构建后生成的jar包文件名会包含POM中定义的版本号，使用通配符*可以匹配任意版本的projectName-*.jar，这样每次更新POM中的版本号后，构建Docker镜像时会自动复制最新版本的jar包，无需手动修改Dockerfile。

内容的提问来源于stack exchange，提问作者Ivan Notarstefano