Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package test; import java.io.IOException; import java.io.PrintWriter; import java.util.Iterator; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileItemFactory; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; /** * * @author Indunil */ public class TestServlet extends HttpServlet { /** * Processes requests for both HTTP <code>GET</code> and <code>POST</code> * methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ private static final long serialVersionUID = 1L; protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, FileUploadException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("Hello<br/>"); boolean isMultipartContent = ServletFileUpload.isMultipartContent(request); if (!isMultipartContent) { out.println("You are not trying to upload<br/>"); return; } out.println("You are trying to upload<br/>"); FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); // upload.setSizeMax(MAX_UPLOAD_IN_MEGS * 1024 * 1024); TestProgressListener testProgressListener = new TestProgressListener(); upload.setProgressListener(testProgressListener); HttpSession session = request.getSession(); session.setAttribute("testProgressListener", testProgressListener); try { List<FileItem> fields = upload.parseRequest(request); out.println("Number of fields: " + fields.size() + "<br/><br/>"); Iterator<FileItem> it = fields.iterator(); if (!it.hasNext()) { out.println("No fields found"); return; } out.println("<table border=\"1\">"); while (it.hasNext()) { out.println("<tr>"); FileItem fileItem = it.next(); boolean isFormField = fileItem.isFormField(); if (isFormField) { out.println("<td>regular form field</td><td>FIELD NAME: " + fileItem.getFieldName() + "<br/>STRING: " + fileItem.getString()); out.println("</td>"); } else { out.println("<td>file form field</td><td>FIELD NAME: " + fileItem.getFieldName() + // "<br/>STRING: " + fileItem.getString() + "<br/>NAME: " + fileItem.getName() + "<br/>CONTENT TYPE: " + fileItem.getContentType() + "<br/>SIZE (BYTES): " + fileItem.getSize() + "<br/>TO STRING: " + fileItem.toString()); out.println("</td>"); } out.println("</tr>"); } out.println("</table>"); } catch (FileUploadException e) { out.println("Error: " + e.getMessage()); } } // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> /** * Handles the HTTP <code>GET</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { processRequest(request, response); } catch (FileUploadException ex) { Logger.getLogger(TestServlet.class.getName()).log(Level.SEVERE, null, ex); } } /** * Handles the HTTP <code>POST</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { processRequest(request, response); } catch (FileUploadException ex) { Logger.getLogger(TestServlet.class.getName()).log(Level.SEVERE, null, ex); } } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> }