myecllipse+tomact下运行JFinal出错求解答

严重: Null component Catalina:type=JspMonitor,name=jsp,WebModule=//localhost/ld,J2EEApplication=none,J2EEServer=none
2013-12-2 16:04:18 org.apache.catalina.startup.HostConfig deployDirectory
严重: Error deploying web application directory ld
java.lang.UnsupportedClassVersionError: Bad version number in .class file (unable to load class com.jfinal.core.JFinalFilter) JFinal

补充：Java ,  Eclipse