启动jetty时异常(jetty7+eclipse-indigo+maven3)

启动jetty时异常(jetty7+eclipse-indigo+maven3)
使用：Eclipse Jetty Launcher Site - http://eclipse-jetty.sourceforge.net/update/ 集成jetty7
异常如下：
Launching Jetty with port 8080, context / and webapp path src/main/webapp
Exception in thread "main" java.lang.NoClassDefFoundError: org/mortbay/jetty/Server
at net.sourceforge.eclipsejetty.launch.JettyLauncherMain.launch(JettyLauncherMain.java:61)
at net.sourceforge.eclipsejetty.launch.JettyLauncherMain.main(JettyLauncherMain.java:50)