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How to consume the fileupload restful webservice using restful template

I am newbie to restful webservice.My requirement is to upload a multiple files.i successfully write the code for uploading multiple files in restful web service.Below is my code.
#POST
#Consumes(MediaType.MULTIPART_FORM_DATA)
#Produces("text/plain")
#Path("/multipleFiles")
public String registerWebService(#Context HttpServletRequest request)
{
String responseStatus = SUCCESS_RESPONSE;
String candidateName = null;
//checks whether there is a file upload request or not
if (ServletFileUpload.isMultipartContent(request))
{
final FileItemFactory factory = new DiskFileItemFactory();
final ServletFileUpload fileUpload = new ServletFileUpload(factory);
try
{
/*
* parseRequest returns a list of FileItem
* but in old (pre-java5) style
*/
final List items = fileUpload.parseRequest(request);
if (items != null)
{
final Iterator iter = items.iterator();
while (iter.hasNext())
{
final FileItem item = (FileItem) iter.next();
final String itemName = item.getName();
final String fieldName = item.getFieldName();
final String fieldValue = item.getString();
if (item.isFormField())
{
candidateName = fieldValue;
System.out.println("Field Name: " + fieldName + ", Field Value: " + fieldValue);
System.out.println("Candidate Name: " + candidateName);
}
else
{
final File savedFile = new File(FILE_UPLOAD_PATH + File.separator
+ itemName);
item.write(savedFile);
}
}
}
}
catch (FileUploadException fue)
{
responseStatus = FAILED_RESPONSE;
fue.printStackTrace();
}
catch (Exception e)
{
responseStatus = FAILED_RESPONSE;
e.printStackTrace();
}
}
return responseStatus;
}
Is it good to upload multifiles in single request?
I want to consume the above restful webservice using restful template or jersey or any other java client.
Can anybody please guide me to write the client code for consuming the above webservice?
Any help will be greatly appreciated!!!

Java FTP using Apache commons throws "IOException caught while copying"

I have made a JavaFX application which includes uploading large files (> 1GB) to a server. Every time I got the same error on same place. Any Suggestions what am I doing wrong here.
ftpclient.connect(server, port);
ftpclient.login(ftpuser, ftppass);
ftpclient.enterLocalPassiveMode();
ftpclient.setKeepAlive(true);
ftpclient.setControlKeepAliveTimeout(3000);
Task<Void> copyMnt = new Task<Void>() {
#Override
protected Void call(){
try {
new Thread(new FTPHandler(ftpclient, source , dest)).run();
} catch (IOException ex) {
Logger.getLogger(MyAppController.class.getName()).log(Level.SEVERE, null, ex);
}
return null;
}
};
new Thread(copyMnt).start();
Now on the FTPHandler Class
// The constructor will set the ftpclient, source and destinations.
#Override
public void run() {
try {
uploadDirectory(this.getClient(), this.getDest(), this.getSrc(), "");
} catch (IOException ex) {
Logger.getLogger(FTPHandler.class.getName()).log(Level.SEVERE, null, ex);
}
}
public static void uploadDirectory(FTPClient ftpClient,
String remoteDirPath, String localParentDir, String remoteParentDir)
throws IOException {
File localDir = new File(localParentDir);
File[] subFiles = localDir.listFiles();
if (subFiles != null && subFiles.length > 0) {
for (File item : subFiles) {
String remoteFilePath = remoteDirPath + "/" + remoteParentDir
+ "/" + item.getName();
if (remoteParentDir.equals("")) {
remoteFilePath = remoteDirPath + "/" + item.getName();
}
if (item.isFile()) {
// upload the file
String localFilePath = item.getAbsolutePath();
java.util.Date date= new java.util.Date();
System.out.println(new Timestamp(date.getTime()) + " : Uploading :: " + localFilePath + " to " + remoteFilePath);
boolean uploaded = uploadSingleFile(ftpClient,
localFilePath, remoteFilePath);
if (uploaded) {
System.out.println("Success : "
+ remoteFilePath);
} else {
System.out.println("Failed : "
+ localFilePath);
}
} else {
// create directory on the server
boolean created = ftpClient.makeDirectory(remoteFilePath);
if (created) {
System.out.println("CREATED the directory: "
+ remoteFilePath);
} else {
System.out.println("COULD NOT create the directory: "
+ remoteFilePath);
}
// upload the sub directory
String parent = remoteParentDir + "/" + item.getName();
if (remoteParentDir.equals("")) {
parent = item.getName();
}
localParentDir = item.getAbsolutePath();
uploadDirectory(ftpClient, remoteDirPath, localParentDir,
parent);
}
}
}
}
Every time I am uploading the files (files are of different types like .iso, .dat etc), The first few files (upload sequence is like first few hundred files are smaller i.e less than few MBs then Last 10 files are more than 1 GB big)will be successfully uploaded (i.e all smaller files and 2 of the last 10 files) but when it starts uploading the third big file I get following exception.
SEVERE: null
org.apache.commons.net.io.CopyStreamException: IOException caught while copying.
at org.apache.commons.net.io.Util.copyStream(Util.java:134)
at org.apache.commons.net.ftp.FTPClient._storeFile(FTPClient.java:653)
at org.apache.commons.net.ftp.FTPClient.__storeFile(FTPClient.java:624)
at org.apache.commons.net.ftp.FTPClient.storeFile(FTPClient.java:1976)

The CopyStreamException has a "cause" exception. Check that using the .getCause(), to see what went wrong.
See the Util.copyStream method:
public static final long copyStream(InputStream source, OutputStream dest,
int bufferSize, long streamSize,
CopyStreamListener listener,
boolean flush)
throws CopyStreamException
{
int bytes;
long total = 0;
byte[] buffer = new byte[bufferSize >= 0 ? bufferSize : DEFAULT_COPY_BUFFER_SIZE];
try
{
while ((bytes = source.read(buffer)) != -1)
{
....
}
}
catch (IOException e)
{
throw new CopyStreamException("IOException caught while copying.",
total, e);
}
return total;
}
Somewhere in your uploadSingleFile function, do
try
{
ftpClient.storeFile(...)
}
catch (Exception e)
{
e.printStackTrace();
if (e.getCause() != null)
{
e.getCause().printStackTrace();
}
}
I do not know Java, so the code may not be 100% correct.
See also Getting full string stack trace including inner exception.

Stop p:commandLink from scrolling to top of page when clicked

I have a JSF2 commandlink with an image. When the image is clicked, the server will download a PDF file. While the file is downloaded after the image link is clicked, it also causes the entire page to scroll to the top of the page. the code snippet for the link is as follows:
<p:commandLink ajax="false"
action="#{refereeAssessmentSummaryBean.stateLatestFormInPAVer(project.appId)}">
<p:graphicImage name="images/pdf.png"
title="#{msg['label.downloadpdf']}" />
</p:commandLink>
How can I use the commandlink to download the PDF file, without the webpage scrolling to the top of the page every time I click on it?
Edit: FWIW, added PDF download code. This code is called as a shared method from the backing bean. As you can see, the code will set the content type before streaming the PDF data to the client.
public void downloadEformPdf(Integer appId, Integer revNo, Integer meetingId,
String password, boolean showSaveDialog, boolean getEditedIfAvailable, boolean showVersionInfo) {
User user = WebUtils.getCurrentUser();
PermissionResult permissionResult = ServiceProxy.getPermissionService().checkViewOnlineProposalPermission(user, appId, meetingId);
if (permissionResult != PermissionResult.GRANTED) {
if (!(permissionResult == PermissionResult.REJECTED_GRBE_COI_NOT_APPROVED
|| permissionResult == PermissionResult.REJECTED_GRBE_COI_NOT_DECLARED)) {
throw new PermissionDeniedException("Permission Denied");
}
}
Application appl = ServiceProxy.getAppService().getApplication(appId);
String scheme = appl.getScheme();
boolean withNomination = false;
boolean isEditedVersion = false;
byte[] pdfData;
if (getEditedIfAvailable) {
if (revNo == null) {
Appmatching appMatching = ServiceProxy.getAppFormService().getLatestAppMatching(appId,false);
revNo = appMatching.getMainRevno();
}
Appattacheditedeform editedEntry = ServiceProxy.getAppService().getEditedProposalForApplication(appId, revNo, true);
// give GRB, ER the edited version if it exists
if (editedEntry != null) {
Filestorage storage = editedEntry.getFilestorage();
pdfData = storage.getContent();
isEditedVersion = true;
} else {
pdfData = ServiceProxy.getReportService().getHMRFReportContentByRevNo(
appId.intValue(), revNo, withNomination);
}
} else { //Get the unedited version
//Get latest rev no.
if (revNo == null) {
Appmatching appMatching = ServiceProxy.getAppFormService().getLatestAppMatching(appId,false);
revNo = appMatching.getMainRevno();
}
pdfData = ServiceProxy.getReportService().getHMRFReportContentByRevNo(
appId.intValue(), revNo, withNomination);
}
FacesContext context = FacesContext.getCurrentInstance();
ExternalContext extContext = context.getExternalContext();
extContext.responseReset();
PDDocument doc = null;
try {
if (pdfData != null) {
PDFParser parser = new PDFParser(new ByteArrayInputStream(pdfData));
parser.parse();
doc = parser.getPDDocument();
AccessPermission ap = new AccessPermission();
ap.setReadOnly();
if (password != null) {
StandardProtectionPolicy spp = new StandardProtectionPolicy(password, password, ap);
spp.setEncryptionKeyLength(128);
doc.protect(spp);
}
ByteArrayOutputStream bos = new ByteArrayOutputStream();
doc.save(bos);
doc.close();
byte[] docbuff = bos.toByteArray();
String refNo = appl.getRefNo();
String filename = null;
if (showVersionInfo) {
if (isEditedVersion) {
filename = scheme.toLowerCase() + "_eform_" + refNo + "_(v" + revNo + ")_(Edited).pdf";
} else {
filename = scheme.toLowerCase() + "_eform_" + refNo + "_(v" + revNo + ")_(PA).pdf";
}
} else {
filename = scheme.toLowerCase() + "_eform_" + refNo + ".pdf";
}
extContext.setResponseContentType("application/pdf");
extContext.setResponseContentLength(docbuff.length);
extContext.setResponseHeader("Content-Disposition", (!showSaveDialog) ? "inline"
: "attachment" + "; filename=\"" + filename + "\"");
OutputStream os = extContext.getResponseOutputStream();
os.write(docbuff);
os.close();
context.responseComplete();
} else {
extContext.setResponseContentType("text/html");
Writer writer = extContext.getResponseOutputWriter();
writer.write("Cannot retrieve PDF form for this proposal.");
writer.close();
context.responseComplete();
}
} catch (IOException e) {
logger.log(Level.ERROR, e.getMessage(), e);
} catch (COSVisitorException e) {
logger.log(Level.ERROR, e.getMessage(), e);
} catch (BadSecurityHandlerException e) {
logger.log(Level.ERROR, e.getMessage(), e);
} finally {
}
}

How do you generate the PDF?
Did you set a mimetype so that the brower will recognize that you respond with a pdf?
Did you also prevent primefaces from continuing the response after you have written your PDF file to it? (use facesContext.responseComplete(); for that)

When you use the default HTML link tag <a />, you have to set href='javascript:void(0)' to avoid the current page to scroll to the top.
Maybe there is a way with a p:commandLink to do the same thing
<p:commandLink url="javascript:void(0)" ... /> ??
Hope this will help you to resolve your problem

I think it's because you are using ajax=false.
If you are not using ajax the whole page will be reloaded.
Either remove it or change to ajax=true and give it a try.
Edit:
I was wrong. ajax=false is required when downloading files.

How can i chage name of image using java while uploading and save in folder? [duplicate]

This question already has answers here:
Recommended way to save uploaded files in a servlet application
(2 answers)
Closed 6 years ago.
<body>
<form method="post" action="DemoServlet" enctype="multipart/form-data" name="form1">
<input type="file" name="file" />
Image_Name:<input type="text" name="file"/>
<input type="submit" value="Go"/>
</form>
</body>
this is my index.jsp page.
This Servlet is DemoServlet when user click on submit button it will go here.while in jsp page suppose Image_Name given by user is IPL and actual name of image is funny.jpg then while saving the image it should store as IPL.png,here i'm able to upload image correctly with funny.jpg,but i need to save image as given name in text field of index.jsp page
public class DemoServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Date date = new Date();
response.setContentType("text/html");
PrintWriter out = response.getWriter();
boolean isMultiPart = ServletFileUpload.isMultipartContent(request);
if (isMultiPart) {
ServletFileUpload upload = new ServletFileUpload();
try {
FileItemIterator itr = upload.getItemIterator(request);
while (itr.hasNext()) {
FileItemStream item = itr.next();
if (item.isFormField()) {
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>");
} else {
String TempPath = getServletContext().getRealPath("");
String path = TempPath.substring(0, TempPath.indexOf("build"));
if (FileUpload.processFile(path, item)) {
out.println("File Uploaded on:" + date + "<br>");
response.getWriter().println("Image Upload Successfully");
} else {
response.getWriter().println("Failed.....Try again");
}
}
}
} catch (FileUploadException fue) {
fue.printStackTrace();
}
}
}
}
and this is java class
public class FileUpload {
public static boolean processFile(String path, FileItemStream item) {
try {
File f = new File(path + File.separator + "web/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) {
e.printStackTrace();
}
return false;
}
}
Could anybody guide me how to change this dynamically.Thanks in advance.

I don't know how Servlet's and the like work however i can give you a rundown of what you need to do.
In DemoServlet you need to take in the input of the Image_Name field and make that one of your parameters of FileUpload
public static boolean processFile(String path, FileItemStream item, String fileName){
//Method Code
}
Because currently your processFile method is taking the name of the file from your FileItemStream. You need to change it from that to your actual fileName
File savedFile = new File(f.getAbsolutePath() + File.separator + item.getName());
to
File savedFile = new File(f.getAbsolutePath() + File.separator + fileName + ".png");

You can change the name of image in your java class code.
public class FileUpload {
public static boolean processFile(String path, FileItemStream item , String name) {
try {
File f = new File(path + File.separator + "web/images");
if (!f.exists()) {
f.mkdir();
}
File savedFile = new File(f.getAbsolutePath() + File.separator + item.getName()); // instead of item.getName() you can give your name.
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) {
e.printStackTrace();
}
return false;
}
you will have to pass the file name in the method.
instead of item.getName() you can give your name.

List fileItems = upload.parseRequest(request);
Iterator i = fileItems.iterator();
System.out.println("In >>>>>>>>>>>>>>> :: "+fileItems);
while(i.hasNext()){
FileItem fi = (FileItem) i.next();
System.out.println("Val <<<<>>>>>>:: "+fi);
if(fi.isFormField()){
String fieldName = fi.getFieldName();
String val = fi.getString();
System.out.println(fieldName+" :: Val :: "+val);
}else{
String fileName = fi.getName();
String root = getServletContext().getRealPath("/");
File path = new File(root+"/uploads");
if (!path.exists()) {
boolean status = path.mkdir();
}
File uploadFile = new File(path+"/"+fileName);
fi.write(uploadFile);
}
In the code above you can change the file name at any time and it will automatically save with this name.

//How does not work in this way?Please tell me another way.
import java.io.File;
public class RenameFileExample {
public static void main(String[] args)
{
File oldfile =new File("oldfile.txt");
File newfile =new File("newfile.txt");
File file = new File("oldfilename.png");
file.renameTo(new File("newfilename.png"));
System.out.println("Rename To:"+file.getName());
if(oldfile.renameTo(newfile)){
System.out.println("Rename succesful");
}else{
System.out.println("Rename failed");
}
}
}

Java servlet: issue with multipart/form-data form

I have a multipart/form-data form with some <input type='text'> and <input type='file'> fields.
I use this code
List<FileItem> multipartItems = null;
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if (!isMultipart) {
System.out.println("false");
} else {
FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
multipartItems = null;
try {
multipartItems = upload.parseRequest(request);
System.out.println("true "+multipartItems.toString());
} catch (FileUploadException e) {
e.printStackTrace();
}
}
to find out if the form has multipart content.
Then, I use
Map<String, String[]> parameterMap = new HashMap<String, String[]>();
for (FileItem multipartItem : multipartItems) {
if (multipartItem.isFormField()) {
processFormField(multipartItem, parameterMap);
} else {
request.setAttribute(multipartItem.getFieldName(), multipartItem);
}
}
By running the first snippet of code, the else is executed, but at the end multipartItems is null.
For this reason, the for in the second code snippet is never executed.
I don't know why there is this behaviour. I'm using Struts 1.3.10
EDIT
How can I check if struts has already parsed the request?
If so, is there a way to turn off it only for a particular form?
EDIT 2
I have a dynamic form, coded in json format. I have a form bean for json and for hidden properties. Then I parse the json "by hand". All works perfectly, but now I have to add input type=file fields and use the multipart/form-data enctype.
To prevent struts request parsing I put in the web.xml:
<init-param>
<param-name>multipartClass</param-name>
<param-value>none</param-value>
</init-param>
But it doesn't seem to work

Initialize a FileItem, like below:
FileItem fileItem = null;
Then call this method
public boolean getParameters(HttpServletRequest request, PrintWriter out) {
List fileItemsList = null;
try {
if (ServletFileUpload.isMultipartContent(request)) {
ServletFileUpload servletFileUpload = new ServletFileUpload(new DiskFileItemFactory());
try {
fileItemsList = servletFileUpload.parseRequest(request);
} catch (FileUploadException ex) {
}
String optionalFileName = "";
Iterator it = fileItemsList.iterator();
while (it.hasNext()) {
FileItem fileItemTemp = (FileItem) it.next();
if (fileItemTemp.isFormField()) {
// for other form fields that are not multipart
// if (fileItemTemp.getFieldName().equals("commonName")) {
// commonName = fileItemTemp.getString();
// }
} else {
if (fileItemTemp.getFieldName().equals("media_file")) {
fileItem = fileItemTemp;
}
}
}
}
} catch (Exception e) {
}
return true;
}

I have used this example to file upload using servlet and jsp is working fine for me . Click here
Example has been explained in detail and if you face any problem then ask me, I have used this.