jetty启动时 java.lang.NoClassDefFoundError: org/objectweb/asm/ClassVisitor

2016-03-18 13:07:17.555:WARN:oejuc.AbstractLifeCycle:FAILED o.e.j.w.WebAppContext{/XMJS,file:/D:/Users/Administrator/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp2/wtpwebapps/XMJS/},D:\Users\Administrator\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp2/wtpwebapps/XMJS: java.lang.NoClassDefFoundError: org/objectweb/asm/ClassVisitor java.lang.NoClassDefFoundError: org/objectweb/asm/ClassVisitor at org.eclipse.jetty.annotations.AnnotationConfiguration.createAnnotationParser(AnnotationConfiguration.java:160) at org.eclipse.jetty.annotations.AnnotationConfiguration.configure(AnnotationConfiguration.java:111) at org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:468) at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1237)2016-03-18 13:07:17.555:WARN:oejuc.AbstractLife