Download a file with JSF? [duplicate]

Answer 1

I needed to make a similar code to download a file via JSF

That's my download button in my JSF page

And it's my Java Code

public void downloadFile() {

    File file = new File("/home/marco/file.txt");
    HttpServletResponse response = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();  

    response.setHeader("Content-Disposition", "attachment;filename=file.txt");  
    response.setContentLength((int) file.length());  
    ServletOutputStream out = null;  
    try {  
        FileInputStream input = new FileInputStream(file);  
        byte[] buffer = new byte[1024];  
        out = response.getOutputStream();  
        int i = 0;  
        while ((i = input.read(buffer)) != -1) {  
            out.write(buffer);  
            out.flush();  
        }  
        FacesContext.getCurrentInstance().getResponseComplete();  
    } catch (IOException err) {  
        err.printStackTrace();  
    } finally {  
        try {  
            if (out != null) {  
                out.close();  
            }  
        } catch (IOException err) {  
            err.printStackTrace();  
        }  
    }  

}