我是 Spring 和 Maven 的新手。
我正在尝试运行一个简单应用程序的 jar,但收到以下错误:
java -jar target/gs-rest-service-0.0.1-SNAPSHOT.jar
Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/boot/SpringApplication
at hello.Application.main(Application.java:10)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.SpringApplication
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 1 more
这是 pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>gs-rest-service</groupId>
<artifactId>gs-rest-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>MyApp</name>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<mainClass>hello.Application</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.10.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
<version>1.5.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
<version>1.5.5.RELEASE</version>
</dependency>
</dependencies>
</project>
这是需要 SpringApplication 的主类:
package hello;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
我还可以看到 org.springframework.boot.SpringApplication 恰好位于 Maven 依赖项库中应有的位置。
所以我不太确定到底发生了什么导致了这个错误。
任何想法?
您可以尝试升级版本maven-jar-plugin
to 3.0.2
and
<project>
...
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
<configuration>
<archive>
<manifestFile>${project.build.outputDirectory}/META-INF/MANIFEST.MF</manifestFile>
</archive>
</configuration>
...
</plugin>
</plugins>
</build>
...
</project>
如果出现此错误,那么您可以按照this https://stackoverflow.com/questions/574594/how-can-i-create-an-executable-jar-with-dependencies-using-mavenstackoverflow 链接,问题来自soemirno
您可以在哪里获得有关此问题的专家的合适答案。
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