Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory

Question

some problems with java and slf4j Made project using idea and it is ok. But in case I try to make jar with gradle I have some problems.

build.gradle

Answer 1

JVM cannot find dependencies on classpath because they're not on classpath obviously. By default Gradle and Maven add just your classes to a jar and you have to specify paths to the dependencies manually with the -cp argument. If you want to build a fat jar you can use ShadowJar with Gradle and Shade with Maven.

Answer 2

dependencies {
    compile group: 'commons-collections', name: 'commons-collections', version: '3.2'
    testCompile group: 'junit', name: 'junit', version: '4.+'
    compile 'ch.qos.logback:logback-core:1.1.6'
    compile 'ch.qos.logback:logback-classic:1.1.6'
    compile 'org.slf4j:slf4j-api:1.7.18'
}

Answer 3

Thanks Michael for remembering about fat jar. After your comment tried to google: "gradle build fat jar" and after it modified my build.gradle

jar {
    from {
        configurations.compile.collect {
            it.isDirectory() ? it : zipTree(it)
        }
    }
    manifest {
        attributes 'Main-Class': 'Test'
    }
}