Maven Jar的类未找到异常 [英] Class Not Found Exception for a Maven Jar
问题描述
我使用maven管理项目中的依赖项.这是我的pom.xml pom.xml
I use maven to manage dependency in my project. This is my pom.xml pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.prasanna</groupId>
<artifactId>fft-java</artifactId>
<version>1.0.0</version>
<packaging>jar</packaging>
<name>fft-java</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<dependency>
<groupId>com.github.wendykierp</groupId>
<artifactId>JTransforms</artifactId>
<version>3.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<!-- Build an executable JAR -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>com.prasanna.TestFFT</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
我的应用程序中只有一个Java类.当我从应用程序运行类时,它会按预期运行.而如果我创建一个mvn package
并尝试以java -jar test-fft.jar
的身份从终端运行它,则会得到一个java.lang.ClassNotFoundException: org.jtransforms.fft.DoubleFFT_2D
I have only one java class in my application. When I run my class from my application, it runs as expected. Whereas if I make a mvn package
and try to run it from the terminal as java -jar test-fft.jar
, I get a java.lang.ClassNotFoundException: org.jtransforms.fft.DoubleFFT_2D
但是这个DoubleFFT_2D是我添加的JTransforms依赖项的一部分.我将如何运行这个罐子?
But this DoubleFFT_2D is a part of JTransforms dependency that I have added. How would I run this jar?
推荐答案
<build>
<plugins>
<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>Mydir/lib</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<outputDirectory>MyDir</outputDirectory>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib</classpathPrefix>
<mainClass>com.test.entryClassOfJarHavingMainMethod</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
使用pom.xml中的这些配置来创建带有lib文件夹的jar,并将其打包为jar
Use these configuration in pom.xml to create jar with lib folder and package as a jar
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