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 ned.bcvs.admin.fileupload; import java.io.File; import java.util.Iterator; import java.util.List; import javax.ejb.EJB; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; /** * * @author StackHouse */ @WebServlet(urlPatterns = "/adminn/constituencyfileupload") public class ConstituencyFileUploadServlet extends HttpServlet { private boolean isMultipart; private String filePath; private int maxFileSize = 5000 * 1024; private int maxMemSize = 4 * 1024; private File file; private String fileName; @EJB private FileUploaderBeanLocal upbean; public void init() { // Get the file location where it would be stored. filePath = getServletContext().getInitParameter("file-upload"); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException { // Check that we have a file upload request isMultipart = ServletFileUpload.isMultipartContent(request); response.setContentType("text/html"); java.io.PrintWriter out = response.getWriter(); if (!isMultipart) { out.println("<html>"); out.println("<head>"); out.println("<title>Servlet upload</title>"); out.println("</head>"); out.println("<body>"); out.println("<p>No file uploaded</p>"); out.println("</body>"); out.println("</html>"); return; } DiskFileItemFactory factory = new DiskFileItemFactory(); // maximum size that will be stored in memory factory.setSizeThreshold(maxMemSize); // Location to save data that is larger than maxMemSize. factory.setRepository(new File( "D:/glassfish12October/glassfish-4.0/glassfish4/" + "glassfish/domains/domain1/applications/temp")); // Create a new file upload handler ServletFileUpload upload = new ServletFileUpload(factory); // maximum file size to be uploaded. upload.setSizeMax(maxFileSize); try { // Parse the request to get file items. List fileItems = upload.parseRequest(request); // Process the uploaded file items Iterator i = fileItems.iterator(); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet upload</title>"); out.println("</head>"); out.println("<body>"); while (i.hasNext()) { FileItem fi = (FileItem) i.next(); if (!fi.isFormField()) { // Get the uploaded file parameters String fieldName = fi.getFieldName(); fileName = fi.getName(); String contentType = fi.getContentType(); boolean isInMemory = fi.isInMemory(); long sizeInBytes = fi.getSize(); // Write the file if (fileName.lastIndexOf("\\") >= 0) { file = new File(filePath + fileName.substring(fileName.lastIndexOf("\\"))); } else { file = new File(filePath + fileName.substring(fileName.lastIndexOf("\\") + 1)); } fi.write(file); out.println("Uploaded Filename: " + fileName + "<br>"); } } //calling the ejb method to save constituency.csv file to data base out.println(upbean.fileDbUploader(filePath + fileName, "constituency")); out.println("</body>"); out.println("</html>"); } catch (Exception ex) { System.out.println(ex); } } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException { throw new ServletException("GET method used with " + getClass().getName() + ": POST method required."); } }