如何從多模塊Maven項目添加依賴項

Question

我有一個如下所示的多模塊Maven設置，

+- pom.xml
+- module1/
   +- pom.xml
+- module2/
   +- pom.xml

module2生成一個可執行jar，並將其依賴項復制到lib/目錄。 為此的pom.xml包含，

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-dependency-plugin</artifactId>
    <executions>
        <execution>
            <id>copy-dependencies</id>
            <phase>prepare-package</phase>
            <goals>
                <goal>copy-dependencies</goal>
            </goals>
            <configuration>
                <outputDirectory>${project.build.directory}/module2/lib</outputDirectory>
                <overWriteReleases>false</overWriteReleases>
                <overWriteSnapshots>false</overWriteSnapshots>
                <overWriteIfNewer>true</overWriteIfNewer>
                <includeScope>runtime</includeScope>
            </configuration>
        </execution>
    </executions>
</plugin>
<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <configuration>
        <archive>
            <manifest>
                <addClasspath>true</addClasspath>
                <classpathPrefix>lib/</classpathPrefix>
                <mainClass>com.test.JksUtility</mainClass>
            </manifest>
            <manifestEntries>
                <Class-Path>.</Class-Path>
            </manifestEntries>
        </archive>
        <outputDirectory>${project.build.directory}/module2</outputDirectory>
    </configuration>
</plugin>

當module1引用module2作為依賴項時，該問題變得很明顯。 在module1的pom.xml中，

<dependency>
    <groupId>com.test</groupId>
    <artifactId>jksutil</artifactId>
    <version>${jksutil.version}</version>
</dependency>

當我嘗試運行module1它告訴我它找不到module2任何依賴項，因為它期望.m2存儲庫中lib/目錄下的所有jar。 這是由於上面定義的classpathPrefix 。

例如，對於缺少的依賴項，我將收到以下錯誤消息，

java.io.FileNotFoundException: /Users/test/.m2/repository/com/test/jksutil/1.2.1-SNAPSHOT/lib/argparse4j-0.7.0.jar (No such file or directory)
    at java.util.zip.ZipFile.open(Native Method)
    at java.util.zip.ZipFile.<init>(ZipFile.java:219)
    at java.util.zip.ZipFile.<init>(ZipFile.java:149)
    at java.util.jar.JarFile.<init>(JarFile.java:166)
    at java.util.jar.JarFile.<init>(JarFile.java:130)
    at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:60)
    at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
    at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:338)
    at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:288)
    at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262)
    at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104)
    at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5196)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

除了創建一個胖/胖的罐子以外，還有其他解決辦法嗎？

Answer 1

請嘗試使用Maven Shade Plugin來構建可執行jar https://maven.apache.org/plugins/maven-shade-plugin/index.html