Myeclipse 8.6使用tomcat7时，运行javaweb项目报出如下错误：

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

解决办法：

1、更换tomcat7为tomcat6

2、添加apache-tomcat-7.0.42/bin/tomcat-juli.jar该jar包到tomcat的类路径中，如下图：