Question

I’m trying to find a way to save a video file. Initially I’d put the video files as blob data into a database, and now, I’m trying to get the blob data back, convert it into bytes, and then write it to a new file. I’ve been successful in doing this, but the problem is, I can’t make the resulting files to run. I tried storing, retrieving, and writing .flv and .mp4 files, but neither work :/ Can anyone help me? Much appreciated! 🙂

Here is my code: 🙂

try {
    Class.forName("com.mysql.jdbc.Driver").newInstance();
    con = DriverManager.getConnection(connectionURL, "root","password");  
    Statement st1 = (Statement) con.createStatement();
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    pstmt = con.prepareStatement("SELECT video_file from video where video_id = " + video_id);
    rs = pstmt.executeQuery();
    Blob blob = null;
    byte[] blyte = null;
    if(rs.next()) {
        blob = rs.getBlob("video_file");
        InputStream is = blob.getBinaryStream();
        FileOutputStream fos = new FileOutputStream("C:\\Downloads\\file2.mp4");
        int b = 0;
        while(b != -1){
            fos.write(b);
            b = bis.read();
        }
    }
//exceptions beyond this point
} catch (InstantiationException e) {
} catch (IllegalAccessException e) {
} catch (ClassNotFoundException e) {
} catch (SQLException e) {
} catch (FileNotFoundException e) {
} catch (IOException e) {
}

Answer 1

There is a ‘\0’ byte written to fos in first iteration of the while-loop which does not come from bis.read().