Hi Dave and Allen,
Thank you for quick reply.
Frankly speaking, I'm not familiarity with using stream and could not come
up with some ideas.
When I coded with java.io.PipedInputStream/PipedOutputStream
like follwoing, I could download an empty file with IllegalStateException.
If anyone give an example how to code,I will really appreciate.
Thanks.
### sample code ###
public class FileDownload extends ActionSupport{
public InputStream inputStream;
public String download() throws Exception {
PipedOutputStream pipeOut = new PipedOutputStream();
PipedInputStream pipeIn = null;
try {
pipeIn = new PipedInputStream(pipeOut);
this.inputStream = pipeIn;
String str = new String("111");
byte[] data = str.getBytes("UTF-8");
pipeOut.write(data);
//the following code does not response to client.
// pipeOut.write(111);
// pipeOut.write(data,0,data.length );
} catch (IOException e) {
e.printStackTrace();
} finally {
//close stream
}
return "success";
}
}
#######
#### IllegalStateException ###
java.lang.IllegalStateException
at
org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:405)
at
org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:770)
at
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:505)
at
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Thread.java:619)
###############
--- Allen Lee <[email protected]> wrote:
> Sometimes I'll create a temp file via File.createTempFile and open an
> InputStream for that but you could just as easily use one of these
> techniques:
>
> http://ostermiller.org/convert_java_outputstream_inputstream.html
>
> 2010/9/15 <[email protected]>:
> > I would like to collect the data by accessing database and create
> the
> > contents for a download file.
> >
> > Without creating the real file for InputStream that the struts2
> convention
> > proposes to use for download, how to code?
> >
> > Regards.
> >
> > --------------------------------------
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> > http://pr.mail.yahoo.co.jp/ie8/
> >
> >
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> >
> >
>
>
>
> --
> Allen Lee
> Center for the Study of Institutional Diversity [http://csid.asu.edu]
> Arizona State University | P.O. Box 872402 | Tempe, Arizona
> 85287-2402
> Office: 480.727.0401 | Fax: 480.965.7671
>
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>
>
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