Down excel file in managed bean, no response?

Question

Hi,
I used JDev 11.1.2
I want to download an excel file by click one button, and I want to implement this function in the managed bean, but after I click the button, no file download, and just refresh the page.
JSP snippet code:
<af:commandToolbarButton text="View Report" id="ctb1" actionListener="#{reportBean.viewReport}">
Method of managed bean(not show exception process ):
public void viewReport(ActionEvent actionEvent) {
// some validation here
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
HttpServletResponse response = (HttpServletResponse)externalContext.getResponse();
BufferedInputStream input = null;
BufferedOutputStream output = null;
String filePath = "c:/a.xls";
File file = new File(filePath);
try {
input = new BufferedInputStream(new FileInputStream(file), 1024);
response.reset();
response.setHeader("Content-Disposition", "attachment; filename=\"" + filePath + "\"");
response.setContentType("application/ms-excel");
output = new BufferedOutputStream(response.getOutputStream(), 10240);
byte[] buffer = new byte[10240];
int length;
while ((length = input.read(buffer)) > 0) {
output.write(buffer, 0, length);
output.flush();
}catch(Exception e){
} finally {
//close output and input
facesContext.responseComplete();
BTW: I can implement the download function by using fileDownloadActionListener, but our requirement needs to validate some information before download(such as status validation, file existence), and I add those validation to fileDownloadActionListener method, but seems no useful.
Any advices?
Thanks,
zeroxin

Answer 1

Timo,
I used the solution mentioned in your blog, and it really can enter into fileDownloadActionListener method, but still not display download file dialog, just seems no useful, I test it using Firefox4 and IE9, the same result.
JSP snippet code:
<af:commandToolbarButton text="View Report" id="ctb1"
actionListener="#{reportBean.viewReport}"/>
<af:commandToolbarButton text="Export..." id="ctb2" visible="false"
binding="#{reportBean.exportReportButton}">
<af:fileDownloadActionListener contentType="application/vnd.ms-excel" filename="Report.xls" method="#{reportBean.reportFileDownload}" />
</af:commandToolbarButton>
Bean method(Snippet code)
private RichCommandToolbarButton exportReportButton;
public void viewReport(ActionEvent actionEvent) {
// validate code here
ActionEvent ae = new ActionEvent(exportReportButton);
ae.queue();
public void reportFileDownload(FacesContext facesContext, java.io.OutputStream outputStream) throws Exception {
DCIteratorBinding dciter = (DCIteratorBinding)getBindings().get("SReportView1Iterator");
Object outputLoc = dciter.getCurrentRow().getAttribute("OutputLoc");
BufferedInputStream input = null;
try {
input = new BufferedInputStream(new FileInputStream((String)outputLoc), 1024);
byte[] buf = new byte[1024];
int count=0;
while ((count = input.read(buf)) >= 0) {
outputStream.write(buf, 0, count);
input.close();
outputStream.flush();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
thanks,
zeroxin