java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory

Myeclipse 8.6使用tomcat7时间。执行javaweb如报告了以下错误项：

java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory
	at org.apache.catalina.startup.Bootstrap.<clinit>(Bootstrap.java:60)
Caused by: java.lang.ClassNotFoundException: org.apache.juli.logging.LogFactory
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
	... 1 more

据说原由于眼下的Myeclipse内核为Eclipse3.5.*不能直接支持tomcat7

解决的方法：

1、更换tomcat7为tomcat6

2、加入apache-tomcat-7.0.42/bin/tomcat-juli.jar那jar包来tomcat类路径，例如下面的附图：