无法找到或加载带有gradle生成的jar文件的主类

Question

我在这个阶段坚持了几个小时，不知道我错过了什么。也许有人看到了明显的错误...

在第一步中，我用Gradle构建一个jar文件：

jar {
    manifest {
        attributes(
                'Main-Class': 'ch.hsr.ebos.offliss.server.Main',
                "Class-Path": configurations.compile.collect { it.getName() }.join(' ')
        )
    }
    from {
        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    }
}

java -jar build/libs/server.jar 
Error: Could not find or load main class ch.hsr.ebos.offliss.server.Main

Manifest-Version: 1.0
Class-Path: 
Main-Class: ch.hsr.ebos.offliss.server.Main

• https://gitlab.com/hsr-ebs/poc/blob/feature/offliss-server-jar/ebos/offliss/server/build.gradle
• https://gitlab.com/hsr-ebs/poc/blob/feature/offliss-server-jar/ebos/offliss/server/src/main/java/ch/hsr/ebos/offliss/server/main.java

Answer 1

通过将gradle构建配置更改为：

jar {
    manifest {
        attributes(
                'Main-Class': 'ch.hsr.ebos.offliss.server.Main'
        )
    }
}


task fatJar(type: Jar) {
    manifest.from jar.manifest
    classifier = 'all'
    from {
        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
    } {
        exclude "META-INF/*.SF"
        exclude "META-INF/*.DSA"
        exclude "META-INF/*.RSA"
    }
    with jar
}