How to read pdf file and write it to outputStream

Question

I need to read a pdf file with filepath "C:\file.pdf" and write it to outputStream. What is the easiest way to do that?

@Controller
public class ExportTlocrt {

@Autowired
private PhoneBookService phoneBookSer;

private void setResponseHeaderTlocrtPDF(HttpServletResponse response) {
    response.setContentType("application/pdf");
    response.setHeader("content-disposition", "attachment; filename=Tlocrt.pdf" );
} 

@RequestMapping(value = "/exportTlocrt.html", method = RequestMethod.POST)
public void exportTlocrt(Model model, HttpServletResponse response, HttpServletRequest request){

    setResponseHeaderTlocrtPDF(response);
    File f = new File("C:\\Tlocrt.pdf");

    try {
        OutputStream os = response.getOutputStream();
        byte[] buf = new byte[8192];
        InputStream is = new FileInputStream(f);
        int c = 0;
        while ((c = is.read(buf, 0, buf.length)) > 0) {
            os.write(buf, 0, c);
            os.flush();
        }
        os.close();
        is.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

}
}

...........................................................................................

Answer 1

import java.io.*;


public class FileRead {


    public static void main(String[] args) throws IOException {


        File f=new File("C:\\Documents and Settings\\abc\\Desktop\\abc.pdf");

        OutputStream oos = new FileOutputStream("test.pdf");

        byte[] buf = new byte[8192];

        InputStream is = new FileInputStream(f);

        int c = 0;

        while ((c = is.read(buf, 0, buf.length)) > 0) {
            oos.write(buf, 0, c);
            oos.flush();
        }

        oos.close();
        System.out.println("stop");
        is.close();

    }

}

The easiest way so far. Hope this helps.