Code sample to upload files in File Store using Java

Code sample to upload files in File Store using Java

  1. import java.io.File;
  2. import java.util.List;
  3. import java.util.logging.Level;
  4. import java.util.logging.Logger;

  6. import javax.servlet.http.HttpServletRequest;
  7. import javax.servlet.http.HttpServletResponse;

  9. import com.catalyst.advanced.CatalystAdvancedIOHandler;

  11. import org.apache.commons.fileupload.FileItem;
  12. import org.apache.commons.fileupload.FileItemFactory;
  13. import org.apache.commons.fileupload.disk.DiskFileItemFactory;
  14. import org.apache.commons.fileupload.servlet.ServletFileUpload;
  15. import org.apache.commons.io.FileUtils;
  16. import org.json.simple.JSONObject;

  18. public class MultipartDataExample implements CatalystAdvancedIOHandler {
  20. private static final Logger LOGGER = Logger.getLogger(InvoiceProcessor.class.getName());
  21. static String POST = "POST";
  22. JSONObject responseData = new JSONObject();

  24. @Override
  25. @SuppressWarnings("unchecked")
  26. public void runner(HttpServletRequest request, HttpServletResponse response) throws Exception {
  27. try {
  28. String url = request.getRequestURI();
  29. String method = request.getMethod();

  31. if ((url.equals("/processFile")) && method.equals(POST)) {

  33. FileItemFactory factory = new DiskFileItemFactory();
  34. ServletFileUpload upload = new ServletFileUpload(factory);
  35. List<FileItem> items = upload.parseRequest(request);

  37. //The List Items will contain your multipart data. You can iterate the list to get your file object and then use it according to your logic.
  39. } else {
  40. LOGGER.log(Level.SEVERE, "Error. Invalid Request");
  41. responseData.put("error", "Request Endpoint not found");
  42. response.setStatus(404);
  43. }

  45. } catch (Exception e) {
  46. LOGGER.log(Level.SEVERE, "Exception in InvoiceProcessor", e);
  47. responseData.put("error", "Internal server error occurred. Please try again in some time.");
  48. response.getWriter().write(responseData.toString());
  49. response.setStatus(500);
  50. }
  51. }
  52. }