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 cpabe.controladores; /** * @author Pankaj * disponvel em * http://www.journaldev.com/1964/servlet-upload-file-and-download-file-example * adaptado por * @author BV1210122 */ import cpabe.entidades.CaminhoArquivo; import cpabe.entidades.FileLocationContextListener; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.util.Iterator; import java.util.List; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; 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.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; @WebServlet("/UploadDownloadFileServlet") public class UploadDownloadFileServlet extends HttpServlet { private static final long serialVersionUID = 1L; private ServletFileUpload uploader = null; @Override public void init() throws ServletException { DiskFileItemFactory fileFactory = new DiskFileItemFactory(); File filesDir = (File) getServletContext().getAttribute("FILES_DIR_FILE"); fileFactory.setRepository(filesDir); this.uploader = new ServletFileUpload(fileFactory); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String fileName = request.getParameter("fileName"); if (fileName == null || fileName.equals("")) { throw new ServletException("O nome do arquivo no pode ser null ou vazio."); } File file = new File(request.getServletContext().getAttribute("FILES_DIR") + File.separator + fileName); if (!file.exists()) { throw new ServletException("O arquivo desejado no existe no Servidor."); } System.out.println("File location on server::" + file.getAbsolutePath()); ServletContext ctx = getServletContext(); InputStream fis = new FileInputStream(file); String mimeType = ctx.getMimeType(file.getAbsolutePath()); response.setContentType(mimeType != null ? mimeType : "application/octet-stream"); response.setContentLength((int) file.length()); response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\""); ServletOutputStream os = response.getOutputStream(); byte[] bufferData = new byte[1024]; int read = 0; while ((read = fis.read(bufferData)) != -1) { os.write(bufferData, 0, read); } os.flush(); os.close(); fis.close(); System.out.println("File downloaded at client successfully"); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if (!ServletFileUpload.isMultipartContent(request)) { throw new ServletException("Content type is not multipart/form-data"); } // response.setContentType("text/html"); // PrintWriter out = response.getWriter(); // out.write("<html><head></head><body>"); try { List<FileItem> fileItemsList = uploader.parseRequest(request); Iterator<FileItem> fileItemsIterator = fileItemsList.iterator(); while (fileItemsIterator.hasNext()) { FileItem fileItem = fileItemsIterator.next(); System.out.println("FieldName=" + fileItem.getFieldName()); System.out.println("FileName=" + fileItem.getName()); System.out.println("ContentType=" + fileItem.getContentType()); System.out.println("Size in bytes=" + fileItem.getSize()); File file = new File(request.getServletContext().getAttribute("FILES_DIR") + File.separator + fileItem.getName()); //setar no objeto CaminhoArquivo os dados do arquivo anexado String caminho = file.getAbsolutePath(); String nome = fileItem.getName(); CaminhoArquivo c = new CaminhoArquivo(); c.setNome(nome); c.setWay(caminho); request.setAttribute("caminho", c); System.out.println("caminho=" + caminho); System.out.println("nome=" + nome); System.out.println("Absolute Path at server=" + file.getAbsolutePath()); fileItem.write(file); request.getRequestDispatcher("/formularios/encriptar/encriptar1.jsp").forward(request, response); // out.write("File " + fileItem.getName() + " uploaded successfully."); // out.write("<br>"); // out.write("<a href=\"UploadDownloadFileServlet?fileName=" + fileItem.getName() + "\">Download " + fileItem.getName() + "</a>"); } } catch (FileUploadException e) { // out.write("Exception in uploading file."); } catch (Exception e) { // out.write("Exception in uploading file."); } // out.write("</body></html>"); } }