[29/Nov/2014:17:08:30 +0800] JAVA_Error: Failed startup of context c.s.s.w.SaeWebAppContext{/wuareyoung-1,file:/data1/jetty_work/671/wuareyoung/jetty-0.0.0.0-12907-wuareyoung.war-_wuareyoung-1-any-/webapp/},/data1/www/htdocs/671/wuareyoung/1/wuareyoung.war
MultiException[java.lang.UnsupportedClassVersionError: qilu/WeAreYoung/servlet/AddGoodServlet : Unsupported major.minor version 51.0, java.lang.UnsupportedClassVersionError: qilu/WeAreYoung/servlet/CustomerServlet : Unsupported major.minor version 51.0, java.lang.UnsupportedClassVersionError: qilu/WeAreYoung/servlet/JsonServlet : Unsupported major.minor version 51.0, java.lang.UnsupportedClassVersionError: qilu/WeAreYoung/servlet/JsonServlet_Park : Unsupported major.minor version 51.0, java.lang.UnsupportedClassVersionError: qilu/WeAreYoung/servlet/JsonServlet_Park_num : Unsupported major.minor version 51.0, java.lang.UnsupportedClassVersionError: qilu/WeAreYoung/servlet/JsonServlet_Seat : Unsupported major.minor version 51.0, java.lang.UnsupportedClassVersionError: qilu/WeAreYoung/servlet/JsonServlet_User_food : Unsupported major.minor version 51.0, java.lang.UnsupportedClassVersionError: qilu/WeAreYoung/servlet/PasswordModifyServlet : Unsupported major.minor version 51.0, java.lang.UnsupportedClassVersionError: qilu/WeAreYoung/servlet/RegisterServlet : Unsupported major.minor version 51.0]
at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:736)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:245)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1208)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:586)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:449)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:58)
at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStar yq30.javaruntime
搜索一下：Unsupported major.minor version 51.0，有很多相关文章。
http://cloudbbs.org/forum.php?mod=viewthread&tid=6819 这个连接查看 一下。希望对你有帮助 。