jar文件Maven Java app中的错误ClassNotFoundException

我尝试打包我的应用程序时出错。如果一个用户在不打包的情况下运行应用程序，它将非常有效。我读了很多有同样问题的帖子，但任何解决方法都对我有用。我正在尝试将我的服务器端应用程序上载到服务器

我对java spring boot有点陌生

xml是

    <?xml version="1.0" encoding="UTF-8"?>
    <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>GastosApp</groupId>
<artifactId>GastosApp</artifactId>
<version>1.0-SNAPSHOT</version>


<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.3.RELEASE</version>
</parent>
<properties>
    <java.version>1.8</java.version>
    <start-class>Gastos.Application</start-class>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
        <version>2.0.4.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>io.jsonwebtoken</groupId>
        <artifactId>jjwt</artifactId>
        <version>0.6.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.mobile</groupId>
        <artifactId>spring-mobile-device</artifactId>
        <version>1.1.5.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>javax.persistence</groupId>
        <artifactId>persistence-api</artifactId>
        <version>1.0.2</version>
    </dependency>

</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <fork>true</fork>
                <mainClass>Gastos.Application</mainClass>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>3.0.0</version>
            <configuration>
                <archive>
                    <manifest>
                        <addClasspath>true</addClasspath>
                        <mainClass>Gastos.Application</mainClass>
                    </manifest>
                </archive>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

<repositories>
    <repository>
        <id>spring-releases</id>
        <name>Spring Releases</name>
        <url>https://repo.spring.io/libs-release</url>
    </repository>
</repositories>

<pluginRepositories>
    <pluginRepository>
        <id>spring-releases</id>
        <name>Spring Releases</name>
        <url>https://repo.spring.io/libs-release</url>
    </pluginRepository>
</pluginRepositories>
</project>

---

您不应该自己打包Springboot应用程序。Springboot为包提供了一个Maven插件。请参见创建新类，该类将实现CommandLineRunner并将该类标记为组件

第一个提示永远不要混合使用spring启动部件的版本…因为您的父版本有2.0.3.RELEASE，而您的spring启动程序安全版本有2.0.4.RELEASE…此外，为什么要用版本定义持久性api？是由spring启动父级定义的…（如果我没记错的话）…除此之外，为什么要使用maven汇编插件？spring boot maven插件可以处理这个问题……顺便说一句：如果没有主类的代码，很难说出什么？……找不到哪个类？@xyz main classe您可以添加一些吗stacktrace@khmarbaise好的，我添加了主类。

@SpringBootApplication
public class Application implements CommandLineRunner {
    @Autowired
    private UserRepository repository;

    public static void main(String[] args){
        SpringApplication.run(Application.class, args);
    }

    @Override
    public void run(String... args) throws Exception{
        System.out.println("Users found with findAll():");
        System.out.println("-------------------------------");
        for (User user : repository.findAll()) {
            System.out.println(user);
        }
        System.out.println();
    }
}