maven工程，启动main方法报错，slf4j 和 log4j冲突？

Question

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".SLF4J: Defaulting to no-operation (NOP) logger implementationSLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory at com.espertech.esper.client.Configuration.<clinit>(Configuration.java:40) at esper.TransationChecker.<init>(TransationChecker.java:31) at esper.InitEsper.main(InitEsper.java:17)Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) ... 3 more

Answer 1

并不是冲突，而是你少包或者少配置了

commons-logging.jar