问题：

Java无法运行程序，因为Java.lang.NoClassDefoundError[duplicate]

郭麒

2023-03-14

java -jar C:\Users\Alexander\Projects/Simulator/target/simulator-1.0-SNAPSHOT.jar 1 "2018-01-01 00:00:00"

但这将导致以下错误：

Error: Unable to initialize main class com.simulator.drivers.MainDriver
Caused by: java.lang.NoClassDefFoundError: org/jooq/TableLike

下面是我现在拥有的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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.simulator</groupId>
  <artifactId>simulator</artifactId>
  <version>1.0-SNAPSHOT</version>
  <properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <junit.version>5.6.0</junit.version>
    <maven-enforcer-plugin.version>3.0.0-M3</maven-enforcer-plugin.version>
    <maven-checkstyle-plugin.version>3.1.0</maven-checkstyle-plugin.version>
    <checkstyle.version>8.29</checkstyle.version>
    <checkstyle-rules.version>4.0.1</checkstyle-rules.version>
    <maven-surefire-plugin.version>3.0.0-M4</maven-surefire-plugin.version>
    <jacoco-maven-plugin.version>0.8.4</jacoco-maven-plugin.version>
    <maven-javadoc-plugin.version>3.0.0</maven-javadoc-plugin.version>
    <coveralls-maven-plugin.version>4.3.0</coveralls-maven-plugin.version>
    <!-- JaCoCo thresholds. Increase gradually as you add tests. -->
    <jacoco.unit-tests.limit.instruction-ratio>0%</jacoco.unit-tests.limit.instruction-ratio>
    <jacoco.unit-tests.limit.branch-ratio>0%</jacoco.unit-tests.limit.branch-ratio>
    <jacoco.unit-tests.limit.class-complexity>20</jacoco.unit-tests.limit.class-complexity>
    <jacoco.unit-tests.limit.method-complexity>5</jacoco.unit-tests.limit.method-complexity>

    <java.version>1.8</java.version>
    <maven.compiler.version>3.8.1</maven.compiler.version>
  </properties>
  <dependencies>
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.3.1</version>
    </dependency>
    <dependency>
        <groupId>com.googlecode.json-simple</groupId>
        <artifactId>json-simple</artifactId>
        <version>1.1</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.12.1</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.23</version>
    </dependency>
  <dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-math3</artifactId>
    <version>3.6.1</version>
  </dependency>    
  <dependency>
    <groupId>commons-codec</groupId>
    <artifactId>commons-codec</artifactId>
    <version>1.10</version>
  </dependency>
  <dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.6</version>
  </dependency>
  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>test</scope>
  </dependency>
    <dependency>
      <groupId>org.jooq</groupId>
      <artifactId>jooq</artifactId>
      <version>3.14.9</version>
    </dependency>
    <dependency>
      <groupId>com.squareup.retrofit2</groupId>
      <artifactId>converter-jackson</artifactId>
      <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.8.0</version>
    </dependency>
    <dependency>
        <groupId>com.squareup.retrofit2</groupId>
        <artifactId>retrofit</artifactId>
        <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpclient</artifactId>
      <version>4.5.13</version>
        </dependency>
  </dependencies>
  <build>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <!--<plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>-->
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-jar-plugin</artifactId>
          <configuration>
            <archive>
              <manifest>
                <addClasspath>true</addClasspath>
                <mainClass>com.simulator.drivers.MainDriver</mainClass>
              </manifest>
            </archive>
          </configuration>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-shade-plugin</artifactId>
          <version>2.1</version>
          <executions>
            <execution>
              <phase>package</phase>
              <goals>
                <goal>shade</goal>
              </goals>
              <configuration>
                <transformers>
                  <transformer
                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                  </transformer>
                </transformers>
              </configuration>
            </execution>
          </executions>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
        <plugin>
          <artifactId>maven-site-plugin</artifactId>
          <version>3.7.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-project-info-reports-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>${maven.compiler.version}</version>
          <configuration>
            <release>15</release>
            <encoding>UTF-8</encoding>
            <source>${java.version}</source>
            <target>${java.version}</target>
          </configuration>
        </plugin>
        <plugin>
          <groupId>org.codehaus.mojo</groupId>
          <artifactId>exec-maven-plugin</artifactId>
          <version>1.2.1</version>
          <configuration>
            <mainClass>com.simulator.drivers.MainDriver</mainClass>
          </configuration>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
  <reporting>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-javadoc-plugin</artifactId>
        <version>${maven-javadoc-plugin.version}</version>
      </plugin>
    </plugins>
  </reporting>
  <profiles>
    <!-- Publish coverage report to Coveralls, only when running in Travis. -->
    <profile>
      <id>travis</id>
      <activation>
        <property>
          <name>env.TRAVIS</name>
        </property>
      </activation>
      <build>
        <plugins>
          <plugin>
            <groupId>org.eluder.coveralls</groupId>
            <artifactId>coveralls-maven-plugin</artifactId>
            <version>${coveralls-maven-plugin.version}</version>
          </plugin>
        </plugins>
      </build>
    </profile>
  </profiles>
</project>

我已经纠结了几天了，我不明白为什么会这样。看起来JOOQ依赖项没有与jar合并，所以我找到了这个插件，但这也没有起到作用。有人能帮我解决这个问题吗？

Manifest-Version: 1.0
Archiver-Version: Plexus Archiver
Created-By: Apache Maven 3.8.1
Built-By: Alexander
Build-Jdk: 15.0.2
Class-Path: gson-2.3.1.jar json-simple-1.1.jar jackson-databind-2.12.1.j
 ar jackson-annotations-2.12.1.jar jackson-core-2.12.1.jar mysql-connect
 or-java-8.0.23.jar protobuf-java-3.11.4.jar commons-math3-3.6.1.jar com
 mons-codec-1.10.jar commons-lang3-3.6.jar jooq-3.14.9.jar reactive-stre
 ams-1.0.2.jar jaxb-api-2.3.1.jar javax.activation-api-1.2.0.jar convert
 er-jackson-2.9.0.jar commons-io-2.8.0.jar retrofit-2.9.0.jar okhttp-3.1
 4.9.jar okio-1.17.2.jar httpclient-4.5.13.jar httpcore-4.4.13.jar commo
 ns-logging-1.2.jar
Main-Class: com.simulator.drivers.MainDriver

宗安翔

2023-03-14

JAR不包含外部依赖项。

我建议您通过以下方式将依赖项与jar捆绑在一起：

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-dependency-plugin</artifactId>
    <executions>
        <execution>
            <id>copy-libs</id>
            <phase>prepare-package</phase>
            <goals>
                <goal>copy-dependencies</goal>
            </goals>
            <configuration>
                <outputDirectory>${project.build.directory}/libs</outputDirectory>
                <overWriteReleases>false</overWriteReleases>
                <overWriteSnapshots>false</overWriteSnapshots>
                <overWriteIfNewer>true</overWriteIfNewer>
                <overWriteIfNewer>true</overWriteIfNewer>
                <includeScope>runtime</includeScope>
                <excludeScope>test</excludeScope>
            </configuration>
        </execution>
    </executions>
</plugin>

插件会为您将libs文件夹添加到类路径中。

Java无法运行程序，因为Java.lang.NoClassDefoundError[duplicate]

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