Check content file DiskFileUpload

Question

Hello,
I wan't to check the content of my file with the crc32 method from the java.util.zip library. Now I have found some topics about this on the forum but this works with the FileInputStream. I work with the DiskFileUpload from the FileUpload class from apache.org.
I have looked through and through but I can't figured out. Can anyone give me some advice.
Here is my code:
public static Uploaden IB(HttpServletRequest request) {
// Variabelen
String Lid_id = null;
String Rubriek_id = null;
String Opmerking = null;
  Uploaden uploaden = new Uploaden();
  Properties prop = System.getProperties();
  String pathname = prop.getProperty("java.io.tmpdir");
  if (pathname==null || pathname.length()==0) pathname=".\\";
try{
// Maak buffer vrij
  byte[] buffer = new byte[10000000];
  int bytesRead;
  buffer= null;
// Kijken of de form van Multipart form-data is
  boolean isMultipart = FileUpload.isMultipartContent(request);
//Database connectie maken
  Class.forName("org.gjt.mm.mysql.Driver");
  Connection con = DriverManager.getConnection(
      "jdbc:mysql://localhost:3306/osso", "root", "root");
// Maken van een nieuwe file upload handler
  DiskFileUpload upload = new DiskFileUpload();
//32-bit checksum
  CRC32 crc = new CRC32();
// Analyseren van de aanvraag
  List items = upload.parseRequest(request, 10000000, 10000000, pathname);
// Bepalen of het een form field is of niet
  Iterator iter = items.iterator();
  while (iter.hasNext()) {
    FileItem item = (FileItem) iter.next();
    if (item.isFormField()) {
      if (item.getFieldName().equals("Lid_id")) {
        Lid_id = item.getString();
      if (item.getFieldName().equals("rubriek")) {
        Rubriek_id = item.getString();
      if (item.getFieldName().equals("Opmerking")) {
       Opmerking = item.getString();
        else {
// Load de file up
/// ********************geen form field dus het object***********************
      if (!item.isFormField()) {
        String fieldName = item.getFieldName();
        File fullFile = new File(item.getName());
        String name = fullFile.getName();
        String contentType = item.getContentType();
        boolean isInMemory = item.isInMemory();
        long sizeInBytes = item.getSize();
///////////////************** Wegschrijven naar de database *********************************
         PreparedStatement pstmt = con.prepareStatement(
                 "INSERT INTO bestand (Bestandsnaam, Bestand, Grootte, Lid_id, Contenttype, Rubriek_id, Opmerking) VALUES (?,?,?,?,?,?,?)");
        pstmt.setString(1, name);
        pstmt.setBinaryStream(2, item.getInputStream(), 10000000);
        pstmt.setLong(3, sizeInBytes);
        pstmt.setString(4, Lid_id);
        pstmt.setString(5, contentType);
        pstmt.setString(6, Rubriek_id);
        pstmt.setString(7, Opmerking);
        pstmt.executeUpdate();can anyone please tell me what to do?
Regards,
Henk

Answer 1

magaupe wrote:How can I check the content of a .txt file?
I need to verify if the file is empty or not.Try this,
new File("d:/YourFile.txt").size();* If the file size is zero , then there is no content
* Other something is there in the file....
Can...Can...If We Try.....!