JFinal.start(）启动出错?报错

@JFinal 你好，想跟你请教个问题：
用jetty-server-8.1.8.jar 和 JFinal-bin-with-src-1.2.jar 或者demo里的jar时  用start启动时会报错

好像不支持java ee 6.0，删掉6.0的包或者用5.0就行   当用 JFinal-1.1.6-bin.jar 和jetty-server-6.1.26.jar时就没问题也可以支持6.0   弄晕了。。

Starting JFinal 1.2
Starting scanner at interval of 5 seconds.
Starting web server on port: 8084
Exception in thread "main" java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/Object;Ljava/lang/Throwable;)V
at org.eclipse.jetty.util.log.JettyAwareLogger.log(JettyAwareLogger.java:607)
at org.eclipse.jetty.util.log.JettyAwareLogger.warn(JettyAwareLogger.java:431)
at org.eclipse.jetty.util.log.Slf4jLog.warn(Slf4jLog.java:69)
at org.eclipse.jetty.util.component.AbstractLifeCycle.setFailed(AbstractLifeCycle.java:204)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:74)
at com.jfinal.server.JettyServer.doStart(JettyServer.java:114)
at com.jfinal.server.JettyServer.start(JettyServer.java:63)
at com.jfinal.core.JFinal.start(JFinal.java:164)
at zust.jfinal.config.StartWeb.main(StartWeb.java:10)