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Download File In Jsp Servlet Book

 
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MessagePosté le: Sam 20 Aoû - 05:26 (2016)    Sujet du message: Download File In Jsp Servlet Book Répondre en citant




Download File In Jsp Servlet Book > bit.ly/2bJhD5F







Download File In Jsp Servlet Book


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I,,would,,love,,to,,hear,,your,,thoughts,,and,,opinions,,on,,my,,articles,,directly.Recently,,I,,started,,creating,,video,,tutorials,,too,,,so,,do,,check,,out,,my,,videos,,on,,Youtube.,,package,,com.journaldev.servlet;,,import,,java.io.File;,,import,,java.io.FileInputStream;,,import,,java.io.IOException;,,import,,java.io.InputStream;,,import,,java.io.PrintWriter;,,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("FILESDIRFILE");,,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("File,,Name,,can't,,be,,null,,or,,empty");,,},,File,,file,,=,,new,,File(request.getServletContext().getAttribute("FILESDIR")+File.separator+fileName);,,if(!file.exists()){,,throw,,new,,ServletException("File,,doesn't,,exists,,on,,server.");,,},,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(",,");,,try,,{,,List,,fileItemsList,,=,,uploader.parseRequest(request);,,Iterator,,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("FILESDIR")+File.separator+fileItem.getName());,,System.out.println("Absolute,,Path,,at,,server="+file.getAbsolutePath());,,fileItem.write(file);,,out.write("File,,"+fileItem.getName()+,,",,uploaded,,successfully.");,,out.write(",,");,,out.write(",,Download,,"+fileItem.getName()+",,");,,},,},,catch,,(FileUploadException,,e),,{,,out.write("Exception,,in,,uploading,,file.");,,},,catch,,(Exception,,e),,{,,out.write("Exception,,in,,uploading,,file.");,,},,out.write(",,");,,},,},,The,,sample,,execution,,of,,the,,project,,is,,shown,,in,,below,,images.Download,,Servlet,,File,,Upload,,Download,,ProjectYou,,can,,download,,Apache,,Commons,,IO,,jar,,and,,Apache,,Commons,,FileUpload,,jar,,from,,below,,URLs.,,filename:,,,name,,,of,,,the,,,file.filedata:,,,contains,,,binary,,,data,,,of,,,the,,,file.,,,2),,There,,have,,2,,ways,,to,,let,,user,,download,,a,,file,,from,,website,,Read,,file,,from,,physical,,location,,File,,file,,=,,new,,File("C:tempdownloadfilename.csv");,,FileInputStream,,fileIn,,=,,new,,FileInputStream(file);,,ServletOutputStream,,out,,=,,response.getOutputStream();,,byte[],,outputByte,,=,,new,,byte[4096];,,//copy,,binary,,contect,,to,,output,,stream,,while(fileIn.read(outputByte,,,0,,,4096),,!=,,-1),,{,,out.write(outputByte,,,0,,,4096);,,},,fileIn.close();,,out.flush();,,out.close();,,Export,,database,,data,,or,,string,,directly,,to,,InputStream,,for,,user,,download.,,What,,,could,,,be,,,wrongReply,,,Pankaj,,,saysAugust,,,11,,,,2014,,,at,,,4:29,,,am,,,I,,,havent,,,tested,,,it,,,with,,,IE,,,,but,,,I,,,suspect,,,this,,,might,,,be,,,because,,,of,,,Content-Type,,,header,,,,please,,,print,,,request,,,header,,,details,,,to,,,figure,,,out,,,anything,,,wrong,,,with,,,it?Reply,,,Snehal,,,saysAugust,,,8,,,,2014,,,at,,,4:44,,,am,,,I,,,have,,,one,,,jsp,,,page,,,containing,,,browse,,,button,,,and,,,tag.,,,id.,,,please,,,suggest,,,me,,,Quote,,,+1,,,#32,,,Charlie,,,2015-03-31,,,04:44I,,,wrote,,,a,,,JSP,,,with,,,the,,,servlet,,,code,,,with,,,some,,,extensive,,,tailoring.,,,By,,mkyong,,,,August,,22,,,2008,,,,Updated,,:,,April,,15,,,2010,,,,Viewed,,:,,283,815,,times,,+1,057,,pv/w,,.,,

mkyong,Founder,of,Mkyong.com,and,HostingCompass.com,,love,Java,and,open,source,stuff.,If,,you,,are,,using,,XML,,based,,configuration,,,you,,should,,do,,it,,in,,the,,web.xml,,file,,and,,remove,,annotation.Reply,,Arab,,saysMay,,23,,,2014,,at,,7:02,,am,,Thanks,,for,,sharing,,,,,but,,when,,I,,press,,the,,upload,,button,,the,,404,,erorr,,is,,shown,,please,,help,,and,,how,,to,,fix,,it,,.Reply,,Pankaj,,saysMay,,23,,,2014,,at,,9:16,,am,,You,,must,,have,,been,,pointing,,to,,wrong,,Servlet,,URI,,,please,,check,,that.Reply,,Arab,,saysMay,,26,,,2014,,at,,2:45,,am,,As,,u,,said,,,,,,Servlet,,URI,,was,,wrong,,,ann,,I,,have,,already,,also,,problem,,with,,import,,java.io,,and,,javax.servlets,,API.now,,every,,thing,,work,,perfectly,,,,curently,,I,,am,,trying,,to,,configure,,your,,code,,so,,that,,I,,can,,upload,,a,,project,,or,,package,,not,,only,,single,,file.,,Here,,i,,show,,a,,simple,,java,,example,,to,,demonstrate,,how,,to,,let,,user,,download,,a,,file,,from,,website.,,Determine,MIME,type,of,the,file,by:,,Get,the,ServletContext,via,the,method,getServletContext(),method,of,the,servlet.,Please,,,suggest,,,the,,,changes.,,,public,,ActionForward,,export(ActionMapping,,mapping,,,ActionForm,,form,,,HttpServletRequest,,request,,,HttpServletResponse,,response),,throws,,Exception,,{,,//tell,,browser,,program,,going,,to,,return,,an,,application,,file,,//instead,,of,,html,,page,,response.setContentType("application/octet-stream");,,response.setHeader("Content-Disposition","attachment;filename=temp.csv");,,try,,{,,ServletOutputStream,,out,,=,,response.getOutputStream();,,StringBuffer,,sb,,=,,generateCsvFileBuffer();,,InputStream,,in,,=,,new,,ByteArrayInputStream(sb.toString().getBytes("UTF-8"));,,byte[],,outputByte,,=,,new,,byte[4096];,,//copy,,binary,,contect,,to,,output,,stream,,while(in.read(outputByte,,,0,,,4096),,!=,,-1),,{,,out.write(outputByte,,,0,,,4096);,,},,in.close();,,out.flush();,,out.close();,,},,return,,null;,,},,private,,static,,StringBuffer,,generateCsvFileBuffer(),,{,,StringBuffer,,writer,,=,,new,,StringBuffer();,,writer.append("DisplayName");,,writer.append(',');,,writer.append("Age");,,writer.append(',');,,writer.append("HandPhone");,,writer.append('n');,,writer.append("mkyong");,,writer.append(',');,,writer.append("26");,,writer.append(',');,,writer.append("0123456789");,,writer.append('n');,,return,,writer;,,},,Heres,,a,,file,,download,,example,,in,,Servlet,,code,,.,,We,,cant,,use,,GET,,method,,for,,uploading,,file.,,I,,wonder,,if,,any,,of,,you,,have,,seen,,this,,before,,and,,what,,you,,did,,to,,fix,,it?,,Cheers,,Charlie,,Quote,,0,,#31,,Nilesh,,Patel,,2015-03-24,,23:04thankx,,Quote,,1234Refresh,,comments,,listRSS,,feed,,for,,comments,,to,,this,,postJComments,,..,,

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