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  1. ,
    via github.com by Unknown author

    This is because SLF4J jar file needs to be added into your application's classpath. In order to fix this issue you have to provide one of the various SLF4J implementation .jar files in the classpath, as well as the interface .jar file.

  2. ,

    you can change your scala version to 2.11.11

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via Stack Overflow by Richard
, 1 year ago
java.lang.ClassNotFoundException: org.slf4j.LoggerFactory	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)	at spark.Service.(Service.java:47)	at spark.Spark$SingletonHolder.(Spark.java:49)	at spark.Spark.getInstance(Spark.java:53)	at spark.Spark.(Spark.java:59)	at undefined.MavenTest01.main(MavenTest01.java:20)