Question

Java的一个fileupload出现的错误：org.apache.commons.fileupload.FileItemFactory

我用的是elipse作为IDE的，控制台弹出的信息如下：

2012-3-26 16:34:24 org.apache.catalina.core.ApplicationContext log
信息: Marking servlet UploadServlet as unavailable
2012-3-26 16:34:24 org.apache.catalina.core.StandardWrapperValve invoke
严重: Allocate exception for servlet UploadServlet
java.lang.ClassNotFoundException: org.apache.commons.fileupload.FileItemFactory
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.newInstance0(Class.java:326)
at java.lang.Class.newInstance(Class.java:308)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1149)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
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:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
at java.lang.Thread.run(Thread.java:662)

Answer 1

java.lang.ClassNotFoundException: org.apache.commons.fileupload.FileItemFactory这个的意思是说没有找到FileItemFactory这个类。估计是你没导入包吧。上面有几个网友已经贴出包名了，你导入试试看吧。

Answer 2

java.lang.ClassNotFoundException: org.apache.commons.fileupload.FileItemFactory

classnotfound 类未找到

缺少包 org.apache.commons.fileupload.FileItemFactory下面的类

追问

不缺啊。

追答

至于你信不信，反正java没有找到位于包
org.apache.commons.fileupload
下面的类FileItemFactory

Answer 3

缺少像这样的jar包
commons-fileupload-1.2.1.jar

Answer 4

包加全了吗？