但是这时候连登录界面都打不开,打开时提示如下错误: UIServer错误:Servlet execution threw an exception [url=]隐藏错误详细[/url]URI:/x5/portal/login.w错误码:500java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at com.justep.classloader.JustepURLClassLoader.a(Unknown Source) at com.justep.classloader.JustepURLClassLoader.a(Unknown Source) at com.justep.classloader.b.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at com.justep.classloader.JustepURLClassLoader.findClass(Unknown Source) at com.justep.classloader.Model$b.findClass(Unknown Source) at com.justep.classloader.Model$a.b(Unknown Source) at com.justep.classloader.Model$a.a(Unknown Source) at com.justep.classloader.Model.getModelClass(Unknown Source) at com.justep.ui.serializer.FreeMarker.processFreemarkerMapFromJava(Unknown Source) at com.justep.ui.serializer.FreeMarker.generateView4w(Unknown Source) at com.justep.ui.serializer.FreeMarker.execute(Unknown Source) at com.justep.ui.WindowServer.freemarker(Unknown Source) at com.justep.ui.WindowServer.service(Unknown Source) at com.justep.ui.servlet.MainServlet.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:595)