[英]Maven Assembly Plugin NoClassDefFoundError
我知道有几篇关于这个特定问题的帖子,但我不知何故没有找到合适的解决方案,很抱歉提出一个之前已经被问过多次的问题:
当我使用 Maven 程序集插件并尝试执行输出 jar 时,出现 NoClassDefFoundError 异常。
我的 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>pm.maven-test</groupId>
<artifactId>packaging</artifactId>
<version>1.0.0</version>
<name>packaging-test</name>
<properties>
<maven.compiler.source>1.8.0</maven.compiler.source>
<maven.compiler.target>1.8.0</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<!-- package as described in assembly.xml next to POM -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<descriptors>
<descriptor>assembly.xml</descriptor>
</descriptors>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>com.pm.cli.Application</mainClass>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<id>assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- package as Jar -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
<configuration>
<archive>
<manifest>
<mainClass>com.pm.cli.Application</mainClass>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
我的程序集.xml:
<assembly
xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
<!-- id -->
<id>dist</id>
<baseDirectory>011_packaging</baseDirectory>
<formats>
<format>tar.gz</format>
</formats>
<fileSets>
<fileSet>
<!-- executable scripts -->
<outputDirectory>bin</outputDirectory>
<directory>${project.basedir}/standalone/bin</directory>
<fileMode>0744</fileMode>
<directoryMode>0755</directoryMode>
</fileSet>
<fileSet>
<!-- instructions -->
<outputDirectory>/</outputDirectory>
<directory>${project.basedir}/standalone</directory>
<includes>
<include>readme.txt</include>
</includes>
</fileSet>
</fileSets>
<dependencySets>
<dependencySet>
<!-- jars -->
<outputDirectory>lib</outputDirectory>
</dependencySet>
</dependencySets>
我的项目设置:
我尝试了几种变体,但没有一个起作用.... 提前致谢;-)
以下更改解决了我的问题:
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>pm.maven-test</groupId>
<artifactId>packaging</artifactId>
<version>1.0.0</version>
<build>
<plugins>
<plugin>
<!-- package as described in assembly.xml next to POM -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<descriptors>
<descriptor>assembly.xml</descriptor>
</descriptors>
</configuration>
<executions>
<execution>
<id>assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- package as Jar -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
<configuration>
<archive>
<manifest>
<mainClass>com.pm.cli.Application</mainClass>
<addClasspath>true</addClasspath>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<!-- Compiler Plugin to set JDK Compiler Configuration -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<!-- actual dependencies -->
<dependencies>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
程序集.xml:
<assembly
xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
<!-- id -->
<id>dist</id>
<baseDirectory>011_packaging</baseDirectory>
<!-- packaging assembly containers -->
<formats>
<format>tar.gz</format>
</formats>
<!-- export directories and files -->
<fileSets>
<fileSet>
<!-- executable scripts -->
<outputDirectory>bin</outputDirectory>
<directory>${project.basedir}/standalone/bin</directory>
<fileMode>0744</fileMode>
<directoryMode>0755</directoryMode>
</fileSet>
<fileSet>
<!-- instructions -->
<outputDirectory>/</outputDirectory>
<directory>${project.basedir}/standalone</directory>
<includes>
<include>readme.txt</include>
</includes>
</fileSet>
</fileSets>
<!-- packaging -->
<dependencySets>
<dependencySet>
<!-- jars -->
<outputDirectory>lib</outputDirectory>
</dependencySet>
</dependencySets>
看起来区别在于build/plugs/plugin/configuration,在该部分之后添加了以下内容:
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>com.pm.cli.Application</mainClass>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
</manifest>
</archive>
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