在NetBeans IDE外部运行时文件无法正确读取/创建

Question

I searched and found many answer and I tried. Following is one of them:

if (Desktop.isDesktopSupported()) {
        try {
            InputStream is = getClass().getResourceAsStream("/folder/SMSCApplication.pdf");
            System.out.println("reading file path ");
            byte[] data = new byte[is.available()];
            is.read(data);
            is.close();
            String tempFile = "User_Guide";
            File temp = File.createTempFile(tempFile, ".pdf");
            FileOutputStream fos = new FileOutputStream(temp);
            fos.write(data);
            fos.flush();
            fos.close();
            Desktop.getDesktop().open(temp);
        } catch (IOException ex) {
            ex.printStackTrace();
            System.out.println("NO PDF READER INSTALLED");
        }
    }

I run application with Netbeans IDE it is working fine. But when I run outside Netbeans it is not working. File creates on temp folder but corrupted ( When I try to open using my default pdf reader ).

My question is, "how to make workable like inside netbeans if I run application form outside netbeans also" ?

Note : My pdf file is inside package because if I distribute my application no need to give user_guide file seperately

Updated:

Answer 1

You have your filepath wrong.

You should be checking if InputStream is null.

if(is == null) System.out.println("Couldn't open");

Use Fully qualified paths.

Answer 2

Thanks to all for your support. Finally I found the solution from HERE . I used third party Commons IO library and changed code byte[] data = new byte(iss.available()); to byte[] data = IOUtils.toByteArray(iss); and worked. Thanks to andy

try {
        InputStream iss = getClass().getResourceAsStream("/folder/SMSCApplication.pdf"); //update the filename here when the help guide is written
        byte[] data = IOUtils.toByteArray(iss);
        iss.read(data);
        iss.close();
        String tempFile = "User_Guide";
        File temp = File.createTempFile(tempFile, ".pdf");
        FileOutputStream fos = new FileOutputStream(temp);
        fos.write(data);
        fos.flush();
        fos.close();
        logger.error(temp.getAbsolutePath());
        Desktop.getDesktop().open(temp.getAbsoluteFile());
    } catch (IOException ex) {
        logger.error(ex);

    }