如何使用maven将一个兄弟模块中的类包含在jar中？ [英] How can I use maven to include classes from a sibling module in a jar?

问题描述

我有一个Maven项目，一个父模块和两个孩子：服务和 API 。 服务模块是一个WAR，包含项目的所有源文件，而 API 模块纯粹存在于从Service模块构建一个包含类的子集的jar，并将该jar部署到本地的maven repo。

我尝试过一个组合的 maven-dependency-plugin 和 maven -assembly-plugin 复制服务 war，并将其包含在部署的 API JAR，但是我很难找到一种方法来从服务模块中获取一组特定的类，而不需要在整个胖的WAR中进行操作。

从 API 的pom.xml：

  ;插件> 
< plugin> 
< groupId> org.apache.maven.plugins< / groupId> 
< artifactId> maven-dependency-plugin< / artifactId> 
<执行> 
< execution> 
< id> copy-dependencies< / id> 
< phase> package< / phase> 
< goals> 
< goal> copy-dependencies< / goal> 
< / goals> 
< configuration> 
< excludeGroupIds> ...< / excludeGroupIds> 
< outputDirectory> $ {project.build.directory} / lib< / outputDirectory> 
< / configuration> 
< / execution> 
< / executions> 
< / plugin> 
< plugin> 
< artifactId> maven-assembly-plugin< / artifactId> 
<执行> 
< execution> 
< goals> 
< goal> single< / goal> 
< / goals> 
< phase> package< / phase> 
< / execution> 
< / executions> 
< configuration> 
< descriptors> 
< descriptor> assembly.xml< / descriptor> 
< / descriptors> 
< / configuration> 
< / plugin> 
< / plugins> 
  

我已经考虑过使用 maven-jar-插件从服务模块的pom，但这似乎是不好的做法。建议？

解决方案

您应该从战争中取出实施细节并放在一个单独的模块中。

 
。 
├──pom.xml 
├──service-api 
 | ├──pom.xml 
 | └──src 
 | └──main 
 | └──java 
 | └──com 
 | └──stackoverflow 
 | └──SomeDao.java 
├──service-impl 
 | ├──pom.xml 
 | └──src 
 | └──main 
 | └──java 
 | └──com 
 | └──stackoverflow 
 | └──SomeDaoImpl.java 
└──service-web 
├──pom.xml 
└──src 
└──main 
└──webapp 
└──WEB-INF 
└──web.xml 
 

让服务-impl 取决于 service-api 。而 service-web 将取决于 service-impl 。

I have Maven project with a parent module and two children: Service and API. The Service module is a WAR and contains all of the source files for the project, while the API module exists purely to build a jar containing a subset of classes from the Service module, and to deploy that jar to a local maven repo.

I've tried a combo of the maven-dependency-plugin and the maven-assembly-plugin to copy over the Service war and include it in the deployed API JAR, but I'm struggling to find a way to pull in just a specific set of classes from the Service module without roping in the entire fat WAR.

From API's pom.xml:

<plugins>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-dependency-plugin</artifactId>
    <executions>
      <execution>
        <id>copy-dependencies</id>
        <phase>package</phase>
        <goals>
          <goal>copy-dependencies</goal>
        </goals>
        <configuration>
          <excludeGroupIds>...</excludeGroupIds>
          <outputDirectory>${project.build.directory}/lib</outputDirectory>
        </configuration>
      </execution>
    </executions>
  </plugin>
  <plugin>
    <artifactId>maven-assembly-plugin</artifactId>
    <executions>
      <execution>
        <goals>
          <goal>single</goal>
        </goals>
        <phase>package</phase>
      </execution>
    </executions>
    <configuration>
      <descriptors>
        <descriptor>assembly.xml</descriptor>
      </descriptors>
    </configuration>
  </plugin>
</plugins>

I've thought about building the slim JAR using the maven-jar-plugin from the Service module's pom, but this seems like bad practice. Suggestions?

解决方案

You should rather take out the implementation details from the war and put in a separate module.

.
├── pom.xml
├── service-api
|   ├── pom.xml
|   └── src
|       └── main
|           └── java
|               └── com
|                   └── stackoverflow
|                       └── SomeDao.java
├── service-impl
|   ├── pom.xml
|   └── src
|       └── main
|           └── java
|               └── com
|                   └── stackoverflow
|                       └── SomeDaoImpl.java
└── service-web
    ├── pom.xml
    └── src
        └── main
            └── webapp
                └── WEB-INF
                    └── web.xml

Let service-impl depend on service-api. And service-web will depend on the service-impl.

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