Question

I have a table of data and i wanted an export function, this application run on web so i want to create a csv file and then offer (open or save as option) usual download options. Im using CSV writer at the moment.
The line in question here is Runtime.getRuntime().exec("export.csv"); give error listed at bottom
How would i do this?

Here is the action tied to a button

Action exportData = new Action() {
    private static final long serialVersionUID = -7803023178172634837L;

    @Override   
    public void execute(UIContext uic, ActionEvent event) {

        try{       
            CSVWriter writer = new CSVWriter(new FileWriter("export.csv"), '\t');
            int i = 0;
            while (i < forExport.getTotalCount()){
                String[] entries = {
                    forExport.getSearchResults().get(i).getName().getGivenNames() + forExport.getSearchResults().get(i).getName().getSurname(),
                    forExport.getSearchResults().get(i).getId()
                };
                writer.writeNext(entries);
                i++;
            }  
            writer.close();
            Runtime.getRuntime().exec("export.csv");  
        }catch(Exception e){
            system.out.print(e);
        }
    }
};

getting error java.io.IOException: Cannot run program "export.csv": CreateProcess error=193, %1 is not a valid Win32 applicationDEBUG

NOTE: i do not want it to automatically open in excel, i want the option to save or open.

Answer 1

I don’t understand why you are exec-ing anything whatsoever. This is server code. You don’t want to exec Excel at the server at all. You want to write the file back to the browser, along with a content-disposition header.