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Цитата(LSD @ 23.8.2006, 10:41)

А можно просто сгенерировать пользователю веб страничку где дать ссылку на файл.

Код

java.lang.NullPointerException
    at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)
    at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)
    at oracle.adfinternal.view.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:157)
    at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
    at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
    at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.0.0) ].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:64)
    at oracle.adfinternal.view.faces.webapp.AdfFacesFilterImpl._invokeDoFilter(AdfFacesFilterImpl.java:367)    
    at oracle.adfinternal.view.faces.webapp.AdfFacesFilterImpl._doFilterImpl(AdfFacesFilterImpl.java:336)    
    at oracle.adfinternal.view.faces.webapp.AdfFacesFilterImpl.doFilter(AdfFacesFilterImpl.java:196)    
    at oracle.adf.view.faces.webapp.AdfFacesFilter.doFilter(AdfFacesFilter.java:87)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.0.0) ].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:629)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.0.0) ].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:376)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.0.0) ].server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:870)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.0.0) ].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:451)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.0.0) ].server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:218)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.0.0) ].server.http.HttpRequestHandler.run(HttpRequestHandler.java:119)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.0.0) ].server.http.HttpRequestHandler.run(HttpRequestHandler.java:112)
    at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)    
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.0.0) ].util.ResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
    at java.lang.Thread.run(Thread.java:595)

Код

HttpServletRequest hsr = (HttpServletRequest)FacesContext.getCurrentInstance().getExternalContext().getRequest();
URL url;
URL ur;
try
{
  url = new URL(hsr.getRequestURL().toString());
  ur = new URL(url,"testReport" + str);
  ExternalContext ectx = FacesContext.getCurrentInstance().getExternalContext();
  HttpServletResponse response = (HttpServletResponse)ectx.getResponse();
  response.sendRedirect(ur.getFile());
}
catch(MalformedURLException e)
{
  // TODO
}
catch(IOException e)
{
  // TODO
}

Код

FileInputStream bis = null;
ServletOutputStream bos = null;

FacesContext context = FacesContext.getCurrentInstance(); 
HttpServletResponse response = (HttpServletResponse)context.getExternalContext().getResponse();
// Устанавливаем тип содержимого       
response.setContentType("application/"+str); 
response.setHeader("Content-disposition","filename=file."+str);

try {
  File fileName = new File("rep\\testReport."+str);
  bis = new FileInputStream(fileName.getAbsolutePath());
  bos = response.getOutputStream();
  byte[] buff = new byte[2048];
  int bytesRead;
  while (-1 !=(bytesRead = bis.read(buff,0,buff.length)))
  {
     bos.write(buff,0,bytesRead);
  }
  response.getOutputStream().flush(); 
  response.getOutputStream().close(); 
  context.responseComplete(); 
} catch (IOException e) {
  e.printStackTrace(); 
}

Код


получение имени файла
...
            response.setHeader("Content-Type","application/octet-stream;");
            response.setHeader("Content-Encoding", "gzip");
            response.setHeader("Content-Disposition", "filename=\""+fName+"\"");

            BufferedInputStream in=new BufferedInputStream (new FileInputStream (getServletContext().getRealPath("/")+"\\docs\\keyw.rar"));

            GZIPOutputStream out1 = new GZIPOutputStream(response.getOutputStream());
            BufferedOutputStream binout=new BufferedOutputStream(out1);
...
передача файла