我正在尝试将服务器应用程序转换为Maven项目，并使用Maven将其导出为.jar。将项目导入eclipse并使用Maven插件转换后，我得到了一个POM文件。在运行mvn包之后，项目中存在许多涉及.jar库依赖项的错误。
我将这些依赖项添加到POM中，并添加了一个允许导出可运行的.jar文件的插件。我的POM文件如下：
<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>160422_v3_Metadecoder</groupId>
<artifactId>160422_v3_Metadecoder</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<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>com.class.ws.classServer</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>gson-2.6.2</groupId>
<artifactId>gson-2.6.2</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\gson-2.6.2.jar</systemPath>
</dependency>
<dependency>
<groupId>classDecLib</groupId>
<artifactId>classDecLib</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\classDecLib.jar</systemPath>
</dependency>
<dependency>
<groupId>logging-interceptor-2.7.5</groupId>
<artifactId>logging-interceptor-2.7.5</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\logging-interceptor-2.7.5.jar</systemPath>
</dependency>
<dependency>
<groupId>javaClientAPI-1302</groupId>
<artifactId>javaClientAPI-1302</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\javaClientAPI-1302.jar</systemPath>
</dependency>
<dependency>
<groupId>javaClientAPI-2202</groupId>
<artifactId>javaClientAPI-2202</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\javaClientAPI-2202.jar</systemPath>
</dependency>
<dependency>
<groupId>joda-time-2.9.3</groupId>
<artifactId>joda-time-2.9.3</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\joda-time-2.9.3.jar</systemPath>
</dependency>
<dependency>
<groupId>okhttp-2.7.5</groupId>
<artifactId>okhttp-2.7.5</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\okhttp-2.7.5.jar</systemPath>
</dependency>
<dependency>
<groupId>swagger-annotations-1.5.9</groupId>
<artifactId>swagger-annotations-1.5.9</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\swagger-annotations-1.5.9.jar</systemPath>
</dependency>
<dependency>
<groupId>cdi-websocket-9.3.6.v20151106</groupId>
<artifactId>cdi-websocket-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\cdi-websocket-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>servlet-api-3.1</groupId>
<artifactId>servlet-api-3.1</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\servlet-api-3.1.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-xml-9.3.6.v20151106</groupId>
<artifactId>jetty-xml-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-xml-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-webapp-9.3.6.v20151106</groupId>
<artifactId>jetty-webapp-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-webapp-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-util-9.3.6.v20151106</groupId>
<artifactId>jetty-util-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-util-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-servlet-9.3.6.v20151106</groupId>
<artifactId>jetty-servlet-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-servlet-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-server-9.3.6.v20151106</groupId>
<artifactId>jetty-server-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-server-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-security-9.3.6.v20151106</groupId>
<artifactId>jetty-security-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-security-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-schemas-3.1</groupId>
<artifactId>jetty-schemas-3.1</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-schemas-3.1.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-rewrite-9.3.6.v20151106</groupId>
<artifactId>jetty-rewrite-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-rewrite-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-quickstart-9.3.6.v20151106</groupId>
<artifactId>jetty-quickstart-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-quickstart-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-proxy-9.3.6.v20151106</groupId>
<artifactId>jetty-proxy-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-proxy-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-plus-9.3.6.v20151106</groupId>
<artifactId>jetty-plus-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-plus-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-nosql-9.3.6.v20151106</groupId>
<artifactId>jetty-nosql-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-nosql-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-jndi-9.3.6.v20151106</groupId>
<artifactId>jetty-jndi-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-jndi-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-jmx-9.3.6.v20151106</groupId>
<artifactId>jetty-jmx-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-jmx-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-jaspi-9.3.6.v20151106</groupId>
<artifactId>jetty-jaspi-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-jaspi-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-jaas-9.3.6.v20151106</groupId>
<artifactId>jetty-jaas-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-jaas-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-io-9.3.6.v20151106</groupId>
<artifactId>jetty-io-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-io-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-infinispan-9.3.6.v20151106</groupId>
<artifactId>jetty-infinispan-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-infinispan-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-http-9.3.6.v20151106</groupId>
<artifactId>jetty-http-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-http-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-deploy-9.3.6.v20151106</groupId>
<artifactId>jetty-deploy-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-deploy-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-continuation-9.3.6.v20151106</groupId>
<artifactId>jetty-continuation-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-continuation-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-client-9.3.6.v20151106</groupId>
<artifactId>jetty-client-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-client-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-annotations-9.3.6.v20151106</groupId>
<artifactId>jetty-annotations-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-annotations-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>jetty-alpn-server-9.3.6.v20151106</groupId>
<artifactId>jetty-alpn-server-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\jetty-alpn-server-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>gcloud-session-manager-9.3.6.v20151106</groupId>
<artifactId>gcloud-session-manager-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\gcloud-session-manager-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>cdi-servlet-9.3.6.v20151106</groupId>
<artifactId>cdi-servlet-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\cdi-servlet-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>websocket-servlet-9.3.6.v20151106</groupId>
<artifactId>websocket-servlet-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\websocket\websocket-servlet-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>websocket-server-9.3.6.v20151106</groupId>
<artifactId>websocket-server-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\websocket\websocket-server-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>websocket-common-9.3.6.v20151106</groupId>
<artifactId>websocket-common-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\websocket\websocket-common-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>websocket-client-9.3.6.v20151106</groupId>
<artifactId>websocket-client-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\websocket\websocket-client-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>websocket-api-9.3.6.v20151106</groupId>
<artifactId>websocket-api-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\websocket\websocket-api-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>javax.websocket-api-1.0</groupId>
<artifactId>javax.websocket-api-1.0</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\websocket\javax.websocket-api-1.0.jar</systemPath>
</dependency>
<dependency>
<groupId>javax-websocket-server-impl-9.3.6.v20151106</groupId>
<artifactId>javax-websocket-server-impl-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\websocket\javax-websocket-server-impl-9.3.6.v20151106.jar</systemPath>
</dependency>
<dependency>
<groupId>javax-websocket-client-impl-9.3.6.v20151106</groupId>
<artifactId>javax-websocket-client-impl-9.3.6.v20151106</artifactId>
<version>1.0.0</version>
<scope>system</scope>
<systemPath>${project.basedir}\lib\websocket\javax-websocket-client-impl-9.3.6.v20151106.jar</systemPath>
</dependency>
</dependencies>
</project>
项目正确构建但是当我运行java -jar example.jar时，出现的.jar会出现以下错误：
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/jetty/server/Handler
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.server.Handler
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
对于可能导致这种情况的任何建议都会非常感激。
编辑：我将我的插件更改为：
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.4.1</version>
<configuration>
<!-- get all project dependencies -->
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<!-- MainClass in mainfest make a executable jar -->
<archive>
<manifest>
<mainClass>com.class.ws.classServer</mainClass>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<!-- bind to the packaging phase -->
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
尝试使用导出的JAR获取所有jar依赖项，但这会产生相同的输出。
答案 0 :(得分：3)
在你的pom的构建部分，你需要以下插件来包含你的jar的类路径的依赖项，然后它们应该使用这个配置位于target / lib文件夹中）：
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/lib</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
编辑：以下是该部分的pom应该是什么样子（当然您可以根据需要修改插件的设置）：
<build>
<plugins>
<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>org.my.main.class</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<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>${project.build.directory}/lib</outputDirectory>
<overWriteReleases>false</overWriteReleases>
<overWriteSnapshots>false</overWriteSnapshots>
<overWriteIfNewer>true</overWriteIfNewer>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>