Spring-Cloud-Zipkin runs incorrectly about 'Exception in thread "main" java.lang.ClassNotFoundException' - zipkin

Question

I am new in spring-cloud.My projects are about spring-cloud-config, spring-cloud-eureka, spring-cloud-zipkin,I am running projects locally and it is normal.When I put my projects in Ubuntu, the project 'spring-cloud-zipkin' runs incorrectly. The error is about 'Exception in thread "main" java.lang.ClassNotFoundException', thanks for your answer very much.
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and my code:
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in the pom.xml:
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Answer 1

I dont kown can you see my pic and I put my code:
pom.xml:
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.test.itoken.zipkin.ZipKinApplication</mainClass>
</configuration>
</plugin>
</plugins>
</build>
ZipkinApplication.java:
package com.test.itoken.zipkin;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import zipkin.server.internal.EnableZipkinServer;
#SpringBootApplication
#EnableEurekaClient
#EnableZipkinServer
public class ZipkinApplication {
public static void main(String[] args) {
SpringApplication.run(ZipkinApplication.class, args);
}
}
The error:
Exception in thread "main" java.lang.ClassNotFoundException: com.test.itoken.zipkin.ZipKinApplication
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:93)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:46)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)