(求救)struts2上传图片文件
做了个简单的Struts2增加user页面，可以选择上传图片，图片能上传上来到指定的文件夹，也能在index页面正常显示，只是在后台报了很多错误，而且添加一次之后再添加就不起作用了...报的错误一样...
我贴一下报错的代码
2011-12-13 22:28:11 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: Unable to parse request
org.apache.commons.fileupload.FileUploadException
at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:381)
at org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest.parse(JakartaMultiPartRequest.java:93)
at org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper.<init>(MultiPartRequestWrapper.java:75)
at org.apache.struts2.dispatcher.Dispatcher.wrapRequest(Dispatcher.java:708)
at org.apache.struts2.dispatcher.ng.PrepareOperations.wrapRequest(PrepareOperations.java:131)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:83)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
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:291)
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:619)
Caused by: java.io.IOException
at org.apache.coyote.http11.InternalAprInputBuffer.fill(InternalAprInputBuffer.java:798)
at org.apache.coyote.http11.InternalAprInputBuffer$SocketInputBuffer.doRead(InternalAprInputBuffer.java:827)
at org.apache.coyote.http11.filters.IdentityInputFilter.doRead(IdentityInputFilter.java:116)
at org.apache.coyote.http11.InternalAprInputBuffer.doRead(InternalAprInputBuffer.java:738)
at org.apache.coyote.Request.doRead(Request.java:428)
at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:304)
at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:410)
at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:327)
at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:193)
at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStream.java:977)
at org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:887)
at java.io.InputStream.read(InputStream.java:85)
at org.apache.commons.fileupload.util.Streams.copy(Streams.java:94)
at org.apache.commons.fileupload.util.Streams.copy(Streams.java:64)
at org.apache.commons.fileupload.MultipartStream.readBodyData(MultipartStream.java:593)
at org.apache.commons.fileupload.MultipartStream.discardBodyData(MultipartStream.java:619)
at org.apache.commons.fileupload.MultipartStream.skipPreamble(MultipartStream.java:638)
at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.findNextItem(FileUploadBase.java:961)
at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:942)
at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:331)
at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:349)
... 17 more
Caused by:
java.io.IOException
at org.apache.coyote.http11.InternalAprInputBuffer.fill(InternalAprInputBuffer.java:798)