Maven 需要为托管依赖项 spring-boot-configuration-processor 指定插件版本

Question

I have a maven project with modules. The parent for my root project is spring-boot-starter-parent , which provides a lot of dependency management.

In my module, I use spring-boot-configuration-processor , which is one of the dependencies managed by spring-boot-starter-parent (well, actually managed by its parent, spring-boot-dependencies ).

If I don't specify the version in the plugins section, my build fails with:

Resolution of annotationProcessorPath dependencies failed: For artifact {org.springframework.boot:spring-boot-configuration-processor:null:jar}: The version cannot be empty. -> [Help 1]

So, I am forced to have the plugins section look like this:

<plugins>
    <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
    </plugin>
    <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
            <annotationProcessorPaths>
                <path>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-configuration-processor</artifactId>
                    <version>2.6.0</version>
                </path>
            </annotationProcessorPaths>
        </configuration>
    </plugin>
</plugins>

However, I would prefer to reference the inherited version. Although spring-boot-dependencies has a lot of properties for the versions of various dependencies, it does not have a property for the version of spring-boot-configuration-processor . Nor does it include spring-boot-configuration-processor in plugin management.

How do I use the inherited version of this plugin instead of having to explicitly specify the version myself?

Answer 1

You need to inherit from parent POM:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>{YOUR_VERSION}</version>
</parent>

Answer 2

I do believe instead of configuring maven-compiler-plugin you just need to declare spring-boot-configuration-processor as a dependency of your project with scope=provided - the purpose of annotationProcessorPaths and annotationProcessors parameters of maven-compiler-plugin is not to add annotation processor, but to force the compiler to use defined annotation processors only.

<plugins>
...
    <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
    </plugin>
...
</plugins>

<dependencies>
...
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-configuration-processor</artifactId>
        <scope>provided</scope>
    </dependency>
...
</dependencies>