LORA上的maven中的java.lang.ClassNotFoundException

（我知道之前已经提出过这个问题，但我无法用这些答案解决这个问题）
我'm pretty new to java and I'尝试编写一些代码来访问并使用https://console.thethingsnetwork.org/中的数据 mvn -X -f "C:\xampp\perl\vendor\lib\Apache\apache-maven-3.5.3\bin\data-mqtt\pom.xml" clean compile exec:java
我明白了（来自终端的调试/错误）

java.lang.ClassNotFoundException：java.lang.ClassLoader.loadClass（ClassLoader.java:566）java.lang.ClassLoader.findClass（ClassLoader.java：466 ：499）在java.lang.Thread.run上的org.codehaus.mojo.exec.ExecJavaMojo $ 1.run（ExecJavaMojo.java:270）（Thread.java:844）[INFO] --------- -------------------------------------------------- ------------- [INFO] BUILD FAILURE [INFO] ----------------------------- ------------------------------------------- [INFO]总时间：5.844 s [INFO]完成时间：2018-06-18T10：47：08 02:00 [INFO] ---------------------------- -------------------------------------------- [ERROR]无法执行目标org.codehaus.mojo：exec-maven-plugin：1.6.0：java（default-cli）on project data-mqtt：执行Java类时发生异常 . App - > [Help 1] org.apache.maven.lifecycle.LifecycleExecutionException：无法在项目数据上执行目标org.codehaus.mojo：exec-maven-plugin：1.6.0：java（default-cli）：mqtt：执行Java类时发生异常 . 在Org.apache.maache.maven.maven上的org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:213）上的org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:154）上的应用程序 . lifecycle.internal.MojoExecutor.execute（MojoExecutor.java:146）在org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject（LifecycleModuleBuilder.java:117）在org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject（ LifecycleModuleBuilder.java:81）在org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build（SingleThreadedBuilder.java:56）在org.apache.maven.lifecycle.internal.LifecycleStarter.execute（LifecycleStarter.java： 128）org.apache.maven.DefaultMaven.doExecute（DefaultMaven.java:305）atg.apache.maven.DefaultMaven.doExecute（DefaultMaven.java:192）org.apache.maven.DefaultMaven.execute（DefaultMaven.java） ：105）org.apache.maven.cli.MavenCli.execute（MavenCli.java:956）org.apache.maven.cli.MavenCli.doMain（MavenCli.jav）一：290）在org.apache.maven.cli.MavenCli.main（MavenCli.java:194）在jdk.internal.reflect.NativeMethodAccessorImpl.invoke0（本机方法）在jdk.internal.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl . java：62）at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）at java.lang.reflect.Method.invoke（Method.java:564）at org.codehaus.plexus.classworlds.launcher.Launcher .launchEnhanced（Launcher.java:289）org.codehaus.plexus.classworlds.launcher.Launcher.launch（Launcher.java:229）org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode（Launcher.java:415） ）org.codehaus.plexus.classworlds.launcher.Launcher.main（Launcher.java:356）引起：org.apache.maven.plugin.MojoExecutionException：执行Java类时发生异常 . 在Org.caphaus.mojo.exec.ExecJavaMojo.execute（ExecJavaMojo.java:339）上的org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo（DefaultBuildPluginManager.java:137）org.apache.maven.lifecycle.internal上的应用程序 . mojoExecutor.execute（MojoExecutor.java:208）org.apache.maven.life.internal.MojoExecutor.execute（MojoExecutor.java:154）org.apache.maven.lifecycle.internal.MojoExecutor.execute（MojoExecutor.java： 146）在org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject（LifecycleModuleBuilder.java:117）在org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject（LifecycleModuleBuilder.java:81）在org.apache.maven .lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build（SingleThreadedBuilder.java:56）在org.apache.maven.lifecycle.internal.LifecycleStarter.execute（LifecycleStarter.java:128）在org.apache.maven.DefaultMaven.doExecute （DefaultMaven.java:305）org.apache.maven.DefaultMaven.doExecute（DefaultMaven.java:192）at org .apache.maven.DefaultMaven.execute（DefaultMaven.java:105）org.apache.maven.cli.MavenCli.execute（MavenCli.java:956）org.apache.maven.cli.MavenCli.doMain（MavenCli.java） ：290）在org.apache.maven.cli.MavenCli.main(MavenCli.java:194）atjdk.internal.reflect.NativeMethodAccessorImpl.invoke0（Native Method）位于jdk.internal.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62），位于java的jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） . lang.reflect.Method.invoke（Method.java:564）org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced（Launcher.java:289）at org.codehaus.plexus.classworlds.launcher.Launcher.launch（ Launcher.java:229）org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode（Launcher.java:415）at org.codehaus.plexus.classworlds.launcher.Launcher.main（Launcher.java:356）引起的：java.lang.ClassNotFoundException：java.lang.ClassLoader.loadClass（ClassLoader.java:566）中java.lang.ClassLoader.findClass（ClassLoader.java：466）的java.lang.ClassLoader.findClass（ClassLoader.java：466） ：499）在java.lang.Thread.run上的org.codehaus.mojo.exec.ExecJavaMojo $ 1.run（ExecJavaMojo.java:270）（Thread.java:844）

到目前为止，这是我的App.java

`
public class App {
public static Client client;

public static void main(String[] args) {
    String region = "eu";
    String appId = "stuf1";
    String accessKey = "stuf2";

   try {
        client = new Client(region, appId, accessKey);
    } catch (URISyntaxException var5) {
        System.out.println(var5);
    }
    client.onError((_error) -> {
        System.out.println("error: " + _error.getMessage());
    });
    client.onConnected((_client) -> {
        System.out.println("connected !");
    });
}}

和我的pom.xml

<repositories>
    <repository>
      <id>Codehaus Mojo</id>
      <name>Codehaus Mojo</name>
      <url>https://oss.sonatype.org/content/repositories/codehaus- 
      snapshots/</url>
      </repository>
  </repositories>
    <build>
    <plugins>
    <plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>exec-maven-plugin</artifactId>
    <version>1.6.0</version>
          <configuration>
            <classpathScope>test</classpathScope>
            <mainClass>App</mainClass>
          </configuration>
          <executions>
            <execution>
              <id>run-App.java</id>
              <phase>integration-test</phase>
              <goals><goal>java</goal></goals>
            </execution>
          </executions>
        </plugin>
        <plugin>
          <artifactId>maven-assembly-plugin</artifactId>

          <configuration>
            <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>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
         <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.7.0</version>
          <configuration>
            <staleMillis>1</staleMillis>
            <useIncrementalCompilation>false</useIncrementalCompilation>
          </configuration>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.21.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-jar-plugin</artifactId>
          <version>3.0.2</version>
        </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>
      </plugins>
    </pluginManagement>
  </build>
</project>

如果有人可以帮助我，如果您需要更多细节，我们将不胜感激 .