java - 如何使用包含依赖项子集的 Maven 生成可执行 jar？

Question

我有一个具有多个依赖项的 Maven SWT 项目:依赖项 1、依赖项 2、依赖项 3、....、依赖项 n。

我想制作一个仅包含项目和依赖项 1 和依赖项 2 的可执行 jar，但其他依赖项将复制到/lib 目录中。

这是我的程序集配置:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-assembly-plugin</artifactId>
  <version>2.2-beta-5</version>
  <dependencies>
    <dependency>
      <groupId>com.company</groupId>
      <artifactId>dependency1</artifactId>
      <version>1.0-SNAPSHOT</version>
    </dependency>
    <dependency>
      <groupId>com.company</groupId>
      <artifactId>dependency2</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>
  <configuration>
    <descriptors>
      <descriptor>mvnDescript.xml</descriptor>
    </descriptors>
    <archive>
      <manifest>
        <addClasspath>true</addClasspath>
        <mainClass>${project.build.mainClass}</mainClass>
      </manifest>
    </archive>
  </configuration>
  <executions>
    <execution>
      <id>make-my-jar-with-dependencies</id>
      <phase>package</phase>
      <goals>
        <goal>single</goal>
      </goals>
    </execution>
  </executions>
</plugin>

和 mvnDescript.xml :

<assembly
  xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
  <formats>
    <format>dir</format>
  </formats>
  <includeBaseDirectory>false</includeBaseDirectory>
  <dependencySets>
    <dependencySet>
      <outputDirectory>/</outputDirectory>
      <unpack>false</unpack>
      <includes>
        <include>${artifact}</include>
      </includes>
    </dependencySet>
    <dependencySet>
      <outputDirectory>/lib</outputDirectory>
      <unpack>false</unpack>
      <excludes>
        <exclude>${artifact}</exclude>
      </excludes>
    </dependencySet>
  </dependencySets>
</assembly>

Answer 1

要创建这样的可执行 jar，您应该了解您将依赖项定义为 maven-assembly-plugin 的类路径的元素。这不是你想做的。 您的项目应该改为定义这些依赖项。当然，您应该使用最新版本的插件。

  <dependencies>
    <dependency>
      <groupId>com.company</groupId>
      <artifactId>dependency1</artifactId>
      <version>1.0-SNAPSHOT</version>
    </dependency>
    <dependency>
      <groupId>com.company</groupId>
      <artifactId>dependency2</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-assembly-plugin</artifactId>
  <version>2.4</version>
  <configuration>
      <descriptorRefs>
        <descriptorRef>jar-with-dependencies</descriptorRef>
      </descriptorRefs>
    </configuration>
    <archive>
      <manifest>
        <addClasspath>true</addClasspath>
        <mainClass>${project.build.mainClass}</mainClass>
      </manifest>
    </archive>
  </configuration>
  <executions>
    <execution>
      <id>jar-with-deps</id>
      <phase>package</phase>
      <goals>
        <goal>single</goal>
      </goals>
    </execution>
  </executions>
</plugin>