JFinal上传文件时用getFile()方法报错

2017-09-14 19:27:35
[ERROR]-[Thread: http-bio-8087-exec-2]-[com.jfinal.core.ActionHandler.handle()]: /upload
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at com.jfinal.aop.Invocation.invoke(Invocation.java:87)
    at com.wlkj.interceptor.GlobalInterceptor.intercept(GlobalInterceptor.java:19)
    at com.jfinal.aop.Invocation.invoke(Invocation.java:67)
    at com.jfinal.core.ActionHandler.handle(ActionHandler.java:82)
    at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:74)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:285)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.jfinal.aop.Invocation.invoke(Invocation.java:73)
    ... 21 more
Caused by: java.lang.NoClassDefFoundError: com/oreilly/servlet/multipart/FileRenamePolicy
    at com.jfinal.core.Controller.getFiles(Controller.java:774)
    at com.jfinal.core.Controller.getFile(Controller.java:779)
    at com.wlkj.controller.FileUploadController.index(FileUploadController.java:17)
    ... 26 more
Caused by: java.lang.ClassNotFoundException: com.oreilly.servlet.multipart.FileRenamePolicy
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
    ... 29 more

原因是缺少cos.jar包，补上即可。