有没有办法强制maven(2.0.9)将所有依赖项包含在一个jar文件中?
我有一个项目的构建到一个单一的jar文件。我希望依赖的类也能复制到jar中。
更新:我知道我不能只在jar文件中包含一个jar文件。我正在寻找一种方法来解包指定为依赖项的jar,并将类文件打包到我的jar中。
有没有办法强制maven(2.0.9)将所有依赖项包含在一个jar文件中?
我有一个项目的构建到一个单一的jar文件。我希望依赖的类也能复制到jar中。
更新:我知道我不能只在jar文件中包含一个jar文件。我正在寻找一种方法来解包指定为依赖项的jar,并将类文件打包到我的jar中。
当前回答
方法1:将依赖的JAR文件复制到target/lib中,然后将它们添加到MANIFEST中的JAR类路径中:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<configuration>
<outputDirectory>${project.build.directory}/lib</outputDirectory>
<excludeTransitive>false</excludeTransitive>
<stripVersion>false</stripVersion>
</configuration>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- Add LIB folder to classPath -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
</manifest>
</archive>
</configuration>
</plugin>
方法2:解包所有依赖项,并将它们的类和资源重新打包到一个平面JAR中。注意:重叠的资源会随机丢失!
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals><goal>single</goal></goals>
</execution>
</executions>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
其他回答
在Maven2中,正确的方法是使用Maven2 Assembly Plugin,它有一个预定义的描述符文件,你可以在命令行中使用:
mvn assembly:assembly -DdescriptorId=jar-with-dependencies
如果你想让这个jar文件可执行,只需要在插件配置中添加要运行的主类:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>my.package.to.my.MainClass</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
如果你想要创建程序集作为正常构建过程的一部分,你应该将单个或单目录目标(程序集目标应该只从命令行运行)绑定到生命周期阶段(包是有意义的),就像这样:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<id>create-my-bundle</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
...
</configuration>
</execution>
</executions>
</plugin>
调整配置元素以满足您的需求(例如使用清单内容)。
我试图做一些类似的事情,但我不希望所有的罐子都包括在内。我想从给定的依赖项中包含一些特定的目录。另外,分类器标签已经被占用,所以我不能做:
<dependencies>
<dependency>
<groupId>your.group.id</groupId>
<artifactId>your.artifact.id</artifactId>
<version>1.0</version>
<type>jar</type>
<classifier>jar-with-dependencies</classifier>
</dependency>
</dependencies>
我使用maven-dependency-plugin和unpack goal 并将我想要的内容解压缩到${project.build。目录}/类,否则将省略 因为它在classes目录中,maven最终将它放在jar中
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>unpack</id>
<phase>prepare-package</phase>
<goals>
<goal>unpack</goal>
</goals>
<configuration>
<artifactItems>
<artifactItem>
<groupId>my.group</groupId>
<artifactId>my.artifact</artifactId>
<classifier>occupied</classifier>
<version>1.0</version>
<type>jar</type>
</artifactItem>
</artifactItems>
<outputDirectory>${project.build.directory}/classes</outputDirectory>
<includes>aaa/**, bbb/**, ccc/**</includes>
</configuration>
</execution>
</executions>
</plugin>
我对月食Luna和m2eclipse的最终解决方案: 自定义类加载器(下载并添加到您的项目,只有5个类) : http://git.eclipse.org/c/jdt/eclipse.jdt.ui.git/plain/org.eclipse.jdt.ui/jar%20in%20jar%20loader/org/eclipse/jdt/internal/jarinjarloader/; 这个类加载器是单jar类加载器中最好的,而且非常快;
< project.mainClass > org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader < / project.mainClass > < project.realMainClass > my.Class < / project.realMainClass >
编辑JIJConstants“Rsrc-Class-Path”为“Class-Path” MVN清洁依赖:复制依赖包 是创建一个jar与依赖lib文件夹与一个瘦类加载器
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.java</include>
<include>**/*.properties</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
<includes>
<include>**/*</include>
</includes>
<targetPath>META-INF/</targetPath>
</resource>
<resource>
<directory>${project.build.directory}/dependency/</directory>
<includes>
<include>*.jar</include>
</includes>
<targetPath>lib/</targetPath>
</resource>
</resources>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>${project.mainClass}</mainClass>
<classpathPrefix>lib/</classpathPrefix>
</manifest>
<manifestEntries>
<Rsrc-Main-Class>${project.realMainClass} </Rsrc-Main-Class>
<Class-Path>./</Class-Path>
</manifestEntries>
</archive>
</configuration>
</plugin>
<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>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
如果你想做一个可执行的jar文件,他们也需要设置主类。所以全构型应该是。
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
<configuration>
<!-- ... -->
<archive>
<manifest>
<mainClass>fully.qualified.MainClass</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
如果你(像我一样)不是特别喜欢上面描述的带依赖的罐子方法, 我更喜欢的maven解决方案是简单地建立一个war项目, 即使你只是在构建一个独立的Java应用程序:
Make a normal maven jar-project, that will build your jar-file (without the dependencies). Also, setup a maven war-project (with only an empty src/main/webapp/WEB-INF/web.xml file, which will avoid a warning/error in the maven-build), that only has your jar-project as a dependency, and make your jar-project a <module> under your war-project. (This war-project is only a simple trick to wrap all your jar-file dependencies into a zip-file.) Build the war-project to produce the war-file. In the deployment-step, simply rename your .war-file to *.zip and unzip it.
你现在应该有一个lib目录(你可以移动到你想要的地方),里面有你的jar和运行应用程序所需的所有依赖项:
java -cp 'path/lib/*' MainClass
(类路径中的通配符在Java-6或更高版本中有效)
我认为这样在maven中设置起来更简单(不需要使用汇编插件),而且可以更清楚地看到应用程序结构(您将在普通视图中看到所有依赖jar的版本号,并避免将所有内容都塞进一个jar文件中)。