java.lang.NoClassDefFoundError: edu/emory/mathcs/backport/java/util/concurrent/B

在junit.test里提示错误：nested exception is java.lang.NoClassDefFoundError: edu/emory/mathcs/backport/java/util/concurrent/BlockingQueue
原因：没有包含：backport-util-concurrent.jar
上面情况还会导致在启动tomcat时出现以下错误：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [Beans.xml]: Invocation of init method failed; nested exception is net.sf.ehcache.CacheException: Error configuring from file:/D:/Eclipse/Work/workspace/.metadata/.me_tcat/webapps/SSH/WEB-INF/classes/ehcache.xml. Initial cause was Error configuring from input stream. Initial cause was Invalid byte 1 of 1-byte UTF-8 sequence.