uploadFile = getFile("coordFile"); 

File file = uploadFile.getFile();

上传提交后，会报以下错误，请问是缺少了什么包？

aused by: java.lang.reflect.InvocationTargetException

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at com.jfinal.aop.Invocation.invoke(Invocation.java:73)

... 40 more

Caused by: java.lang.NoClassDefFoundError: com/oreilly/servlet/multipart/FileRenamePolicy

at com.jfinal.core.Controller.getFiles(Controller.java:767)

at com.jfinal.core.Controller.getFile(Controller.java:777)