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 Project; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.HashMap; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItemIterator; import org.apache.commons.fileupload.FileItemStream; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.servlet.ServletFileUpload; /** * * @author Dinesh Theja Gajje */ public class FileUploadServlet 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 */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); try (PrintWriter out = response.getWriter()) { /* TODO output your page here. You may use following sample code. */ out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet FileUploadServlet</title>"); out.println("</head>"); out.println("<body>"); out.println("<h1>Servlet FileUploadServlet at " + request.getContextPath() + "</h1>"); out.println("</body>"); out.println("</html>"); } } // <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 { processRequest(request, response); } /** * 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 { //processRequest(request, response); response.setContentType("text/html"); String path = ""; boolean isMultiPart = ServletFileUpload.isMultipartContent(request); if (isMultiPart) { ServletFileUpload upload = new ServletFileUpload(); try { String category = ""; String keywords = ""; double cost = 0.0; String imagess = ""; String user = ""; FileItemIterator itr = upload.getItemIterator(request); Map<String, String> map = new HashMap<String, String>(); while (itr.hasNext()) { FileItemStream item = itr.next(); if (item.isFormField()) { //do variable declaration of the specific field String fieldName = item.getFieldName(); InputStream is = item.openStream(); byte[] b = new byte[is.available()]; is.read(b); String value = new String(b); response.getWriter().println(fieldName + ":" + value + "<br/>"); map.put(fieldName, value); } else { //do file upload and store the path as variable path = getServletContext().getRealPath("/"); //will write a method and we will call here if (processFile(path, item)) { response.getWriter().println("File uploaded successfully"); response.getWriter().println(path); } else { response.getWriter().println("File uploading failed"); } } for (Map.Entry<String, String> entry : map.entrySet()) { if (entry.getKey().equals("category")) { category = entry.getValue(); } else if (entry.getKey().equals("keywords")) { keywords = entry.getValue(); } else if (entry.getKey().equals("cost")) { cost = Double.parseDouble(entry.getValue()); } else if (entry.getKey().equals("fileName")) { imagess = entry.getValue(); } else if (entry.getKey().equals("user")) { user = entry.getValue(); } } } response.getWriter().println("images\\" + imagess); imagess = "images\\" + imagess; response.getWriter().println(category + "---" + keywords + "----" + cost + "---" + imagess); DB_Users d = new DB_Users(); d.insertProduct(category, keywords, imagess, cost, user); } catch (FileUploadException e) { e.printStackTrace(); } } else { //do nothing } } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> public static boolean processFile(String path, FileItemStream item) { try { File f = new File(path + File.separator + "images"); if (!f.exists()) { f.mkdir(); } File savedFile = new File(f.getAbsolutePath() + File.separator + item.getName()); FileOutputStream fos = new FileOutputStream(savedFile); InputStream is = item.openStream(); int x = 0; byte[] b = new byte[1024]; while ((x = is.read(b)) != -1) { fos.write(b, 0, x); } fos.flush(); fos.close(); return true; } catch (Exception e) { return false; } } }