发现了一些有关此问题的其他问题,但似乎没有一个问题可以解决我的问题。
我有一个外部JAR需要包含在我生成的jar中。我目前正在这样做:
<dependency>
<groupId>be.april.meter</groupId>
<artifactId>JRPiCam</artifactId>
<version>1.1.1</version>
<scope>system</scope>
<systemPath>${project.basedir}/src/main/resources/jrpicam-1.1.1.jar</systemPath>
</dependency>
当在IDE中运行我的主类时,一切正常,因为它应该是。然而,当尝试运行Maven生成JAR时,我收到NoClassDefFoundError
错误。我已经尝试过生成一个“胖子”和“阴影”。罐子和所有的东西,但没有一个帮助。
我还尝试使用Maven Install Plugin(https://eureka.ykyuen.info/2014/06/10/maven-include-system-scope-dependency-in-maven-assembly-plugin/)安装jar,但这会产生与我当前解决方案完全相同的错误。
可在此处找到完整的pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>be.april.meter</groupId>
<artifactId>April-Meter</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<!-- Build an executable JAR -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>be.april.meter.Main</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.10.0</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.10.0</version>
</dependency>
<dependency>
<groupId>be.april.meter</groupId>
<artifactId>JRPiCam</artifactId>
<version>1.1.1</version>
<scope>system</scope>
<systemPath>${project.basedir}/src/main/resources/jrpicam-1.1.1.jar</systemPath>
</dependency>
</dependencies>
提前致谢。
- 编辑:似乎log4j也不会加载。我通过添加:
来修复此问题<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>
<includeScope>compile</includeScope>
<outputDirectory>${project.build.directory}/lib/</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
这会导致JRPiCam jar与log4j depdendencies一起位于/ lib输出目录中,但JRPiCam仍然无法正常工作。
答案 0 :(得分:1)
您可以尝试使用maven程序集插件。我刚刚验证过,它也适用于外部依赖项。运行时会创建一个可执行jar。
mvn clean install
<modelVersion>4.0.0</modelVersion>
<groupId>com.spring</groupId>
<artifactId>maven-test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<java.version>10</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>1.9.5</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.10.0</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.10.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>com.test.MyMain</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>10</source>
<target>10</target>
</configuration>
</plugin>
</plugins>
</build>
答案 1 :(得分:0)
我通过将jar上传到私有Nexus Repo来修复此问题。真正解决的其他解决方案&#39;主要问题随时欢迎..