在myeclilpse6.0中启动tomcat7.0.5报错java.lang.NoClassDefFoundError: or... .........

java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory
 at org.apache.catalina.startup.Bootstrap.<clinit>(Bootstrap.java:56)
Caused by: java.lang.ClassNotFoundException: org.apache.juli.logging.LogFactory
 at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
 at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
 ... 1 more

----------------------------------------解决方法-------------------------------------------------------

打开myeclipse，Preferentces->MyEclipse->Servers->Tomcat->Tomcat 6.x 
,载入Tomcat7.0.5，在"Paths"下，点击“Add JAR/ZIP”,加载tomcat7下的……/bin/tomcat-juli.jar。点击“OK”.