如何将所有依赖项放在runnable jar的单独文件夹中？

本文介绍了如何将所有依赖项放在runnable jar的单独文件夹中？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在使用 mvn package 来创建一个可运行的jar，其中包含所有依赖项，运行正常。 但我更喜欢将所有外部依赖项打包在一个单独的文件夹中。那么我需要改变什么呢？

I'm using mvn package to create a runnable jar with all dependencies packed inside, which runs fine. But I'd prefer to have all external dependencies packed in a separate folder. What would I have to change therefore?

<plugin> <artifactId>maven-assembly-plugin</artifactId> <version>2.4</version> <configuration> <descriptorRefs> <descriptorRef>jar-with-dependencies</descriptorRef> </descriptorRefs> <archive> <manifest> <mainClass>my.MainApp</mainClass> </manifest> </archive> </configuration> <executions> <execution> <id>make-assembly</id> <phase>package</phase> <goals> <goal>single</goal> </goals> </execution> </executions> </plugin>

推荐答案

使用 maven-dependencies -plugin 指定 copy-dependencies 执行的输出目录。

Use the maven-dependencies-plugin to specify an output directory for the copy-dependencies execution.

<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-dependency-plugin</artifactId> <version>2.5.1</version> <executions> <execution> <id>copy-dependencies</id> <phase>package</phase> <goals> <goal>copy-dependencies</goal> </goals> <configuration> <outputDirectory>${project.build.directory}/lib/</outputDirectory> </configuration> </execution> </executions> </plugin>

更新：

要让jar知道在哪里找到 lib 文件夹，您可以将其指定为 Class-Path 清单中的值使用 maven-jar-plugin

To let the jar know where to find the lib folder, you can specify this as a Class-Path value in the manifest using the maven-jar-plugin

<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId> <configuration> <archive> <manifest> <addClasspath>true</addClasspath> <classpathPrefix>lib/</classpathPrefix> <mainClass>foo.bar.MainClass</mainClass> </manifest> </archive> </configuration> </plugin>

希望这会有所帮助。