just a simple question, with a hard (for me) to find answer :D. Here is my code (im going to try to translate the spanish part):
File carpetanueva = new File("C:"+File.separator+"sistema" + File.separator +
fechasal+File.separator+doc);
carpetanueva.mkdirs();
carpetanueva.setWritable(true);
rutadestino = ("c:"+File.separator+"sistema" +
File.separator + fechasal+File.separator +
doc+File.separator+"imagen.jpg");
//realizo la copia de la imagen desde el jfilechooser a su destino:
Path desde = Paths.get(rutaorigen);
Path hacia = Paths.get(rutadestino);
try {
Files.copy(desde, hacia);
JOptionPane.showMessageDialog(null,
"Se adjunto la planilla de ambulancia correctamente");
} catch (IOException e) {
JOptionPane.showMessageDialog(null, "error: "+e.getLocalizedMessage());
}
I get "rutaorigen" (frompath) from a JFileChooser. And I create "rutadestino" (topath) by using some variables so this way i can give an order. The problem is.. .if directories and the file "imagen.jpg" already exists, it gives an error.. (exception).. How can i make to check if image already exists, and if it does, rename the new image to , for example, imagen2? I cant figure out code, because im a newbie, I did a research and couldnt find something like this! Thanks in advance :)
OK, here is a quick solution if src is a Path to the file you want to copy, dst a Path to the file you want to write, and newName a Path to the file you want to rename to:
if (Files.exists(dst))
Files.move(dst, newName);
Files.copy(src, dst);
Note that you can use the methods in Path to facilitate your path building: .resolve(), .resolveSibling(), .relativize().
Edit: here is a function which will return a suitable name given a directory (dir), a base filename baseName and an "extension" (without the dot) extension:
private static Path findFileName(final Path dir, final String baseName,
final String extension)
{
Path ret = Paths.get(dir, String.format("%s.%s", baseName, extension));
if (!Files.exists(ret))
return ret;
for (int i = 0; i < Integer.MAX_VALUE; i++) {
ret = Paths.get(dir, String.format("%s%d.%s", baseName, i, extension));
if (!Files.exists(ret))
return ret;
}
throw new IllegalStateException("What the...");
}
I think this link will help How do I check if a file exists?
So for your case, probably do something like:
File toFile = new File(rutadestino);
if (toFile.exists()) {
// rename file
toFile.renameTo(new File("newFilePath/newName.jpg"));
} else {
// do something if file does NOT exist
}
Hope that helps! For more info, also check the Java Docs for File
sory late. but my code can help to litle bit.
public void copyFile(File source, File dest) throws IOException,
FileAlreadyExistsException {
File[] children = source.listFiles();
if (children != null) {
for (File child : children) {
if (child.isFile() && !child.isHidden()) {
String lastEks = child.getName().toString();
StringBuilder b = new StringBuilder(lastEks);
File temp = new File(dest.toString() + "\\"
+ child.getName().toString());
if (child.getName().contains(".")) {
if (temp.exists()) {
temp = new File(dest.toString()
+ "\\"
+ b.replace(lastEks.lastIndexOf("."),
lastEks.lastIndexOf("."), " (1)")
.toString());
} else {
temp = new File(dest.toString() + "\\"
+ child.getName().toString());
}
b = new StringBuilder(temp.toString());
} else {
temp = new File(dest.toString() + "\\"
+ child.getName());
}
if (temp.exists()) {
for (int x = 1; temp.exists(); x++) {
if (child.getName().contains(".")) {
temp = new File(b.replace(
temp.toString().lastIndexOf(" "),
temp.toString().lastIndexOf("."),
" (" + x + ")").toString());
} else {
temp = new File(dest.toString() + "\\"
+ child.getName() + " (" + x + ")");
}
}
Files.copy(child.toPath(), temp.toPath());
} else {
Files.copy(child.toPath(), temp.toPath());
}
} else if (child.isDirectory()) {
copyFile(child, dest);
}
}
}
}
features :
1. rename if file exist in the destination. example: document.doc if exist document (1).doc if exist document (2).doc if exist ...
2. copy all file from source (only file) to one folder in destination
The code below checks if the file already exists in destination, if it does, it appends #1 to file name just before the extension. If that file name also exists, it keeps appending #2,#3,#4... till the file name doesn't exist in destination. Since () and spaces create problems in Unix environment, I used # instead.
You can extend this and do a SUMCHECK if the file in destination with the identical name also has the same content and act accordingly.
Credit goes to johan indra Permana
String lastEks = file.getName().toString();
StringBuilder b = new StringBuilder(lastEks);
File temp = new File(backupDir.toString() + File.separator + file.getName().toString());
if (file.getName().contains(".")) {
if(temp.exists()) {
temp = new File(backupDir.toString() + File.separator +
b.replace(lastEks.lastIndexOf("."), lastEks.lastIndexOf("."),"#1").toString());
} else {
temp = new File(backupDir.toString() + File.separator + file.getName().toString());
}
b = new StringBuilder(temp.toString());
} else {
temp = new File(backupDir.toString() + File.separator + file.getName());
}
if (temp.exists()) {
for (int x=1; temp.exists(); x++) {
if(file.getName().contains(".")) {
temp = new File (b.replace(
temp.toString().lastIndexOf("#"),
temp.toString().lastIndexOf("."),
"#" + x ).toString());
} else {
temp = new File(backupDir.toString() + File.separator
+ file.getName() + "#" + x );
}
}
Files.copy(file.toPath(), temp.toPath());
} else {
Files.copy(file.toPath(), temp.toPath());
}
Related
i am using library apache common io to copy file in my java program. when i tried to copy a lot of files (about 250.000) it just copied 4.454 and then stopped copying.
i saw in the task manager it's still running.
public void copyFiles(File source, File dest) {
Collection<File> all = new ArrayList<File>();
try {
addTree(source, all);
for (File elem : all) {
int p = 1;
File newFile = new File(dest.toString() + "\\" + elem.getName().replace(".", " ("+p+")."));
if (findFile(elem.getName(), dest)) {
for (int x = 1; newFile.exists() == true; x++) {
newFile = new File(dest.toString() + "\\" + elem.getName().replace(".", " ("+x+")."));
}
FileUtils.copyFile(elem.getAbsoluteFile(), newFile);
// jika file TIDAK di hidden maka copy file ke direktori
} else if (!(elem.isHidden())) {
FileUtils.copyFileToDirectory(elem, dest);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
Hello i`ve made a program where i unmarshall XML file, get those informations and use them for connecting to server and move files to another folder.
The program goes like this:
1.get the informations from xml
2.connect and upload them to server
3.move the files that have been uploaded to another folder locally.
The problem is when i put Object and method of Upload. The upload is okay, the files are uploaded, new folders are created for files to move there, but the files dont move, they are in the same directory.
If i put Move object and method above Upload its opposite. The files are moved to another folder(locally) but they are not uploaded...
What can be the problem and how to fix this?
Thank you!
Here is my method for marsh and there i use both methods(upload and move):
public void unmarshallList() {
try {
JAXBContext jc = JAXBContext.newInstance(ListNodes.class);
Unmarshaller ums = jc.createUnmarshaller();
ListNodes ln = (ListNodes) ums.unmarshal(new File("C:\\Users\\Desktop\\marshList.xml"));
System.out.println("INFORMATIONS");
System.out.println("-------------------------------");
for (Node p : ln.getListNode()) {
System.out.println("Hostname: " + p.getHostname());
System.out.println("Username: " + p.getUsername());
System.out.println("Password: " + p.getPassword());
System.out.println("Port: " + p.getPort());
System.out.println("Pc Directory: " + p.getPcDirectory());
System.out.println("Node Directory: " + p.getNodeDirectory());
System.out.println("Time interval: " + p.getTimeInterval());
System.out.println("Move Directory" + p.getMoveDir());
System.out.println("-------------------------------");
Upload up = new Upload();
up.connection(p.getHostname(), p.getPort(), p.getUsername(), p.getPassword(), p.getNodeDirectory(), p.getPcDirectory(), p.getTimeInterval(), p.getMoveDir());
Move mv = new Move();
mv.moveFiles(p.getPcDirectory(), p.getMoveDir());
}
} catch (Exception e) {
// TODO: handle exception
System.out.println(e.getMessage());
}
}
And here is my move method:
public static void moveFiles (String oldLocation, String newLocation) {
File source = new File(oldLocation);
File dest = new File(newLocation);
new File(newLocation).mkdir();
File[] files = source.listFiles();
for (File file : source.listFiles()) {
System.out.println(source + "\\" + file.getName());
String x = (source + "\\" + file.getName());
String y = (dest + "\\" + file.getName());
File f1 = new File(x);
f1.renameTo(new File(y));
System.out.println("This file is moved "+x );
}
System.out.println("The files are moved" );
}
And here is the upload method:
private static void recursiveFolderUpload(String sourcePath, String
destinationPath) throws SftpException, FileNotFoundException {
File sourceFile = new File(sourcePath);
if (sourceFile.isFile()) {
// copy if it is a file
channelSftp.cd(destinationPath);
if (!sourceFile.getName().endsWith(".xml"));
channelSftp.put(new FileInputStream(sourceFile), sourceFile.getName(), ChannelSftp.OVERWRITE);
} else {
System.out.println("inside " + sourceFile.getName());
File[] files = sourceFile.listFiles();
if (files != null && !sourceFile.getName().endsWith(".xml")) {
channelSftp.cd(destinationPath);
SftpATTRS attrs = null;
// check if the directory is already existing
try {
attrs = channelSftp.stat(destinationPath + "/" + sourceFile.getName());
} catch (Exception e) {
System.out.println(destinationPath + "/" + sourceFile.getName() + " not found");
}
// else create a directory
if (attrs != null) {
System.out.println("Directory exists IsDir=" + attrs.isDir());
} else {
System.out.println("Creating dir " + sourceFile.getName());
channelSftp.mkdir(sourceFile.getName());
}
for (File f: files) {
recursiveFolderUpload(f.getAbsolutePath(), destinationPath + "/" + sourceFile.getName());
}
}
}
My guess would be the InputStream of the source file is not closed.
I'd try
InputStream in = new FileInputStream(sourceFile)
try {
channelSftp.put(in, sourceFile.getName(), ChannelSftp.OVERWRITE);
} finally {
in.close();
}
or another way
try (InputStream in = new FileInputStream(sourceFile)) {
channelSftp.put(in, sourceFile.getName(), ChannelSftp.OVERWRITE);
}
which closes the InputStream uppon exiting the try statement.
However - without debugging / any exception message it is almost impossible to be sure
I am trying to get a list of all Folders that contain MP3 Files on the user's Internal Storage.
Here is the recursive function that I am calling for this purpose -
public void listAllMusicFiles(String pathToDirectory) {
String lastFolderPath = "";
int mp3Count = 0;
File f = new File(pathToDirectory);
File[] files = f.listFiles();
for (File inFile : files) {
if (inFile.isDirectory()) {
//reset last folder path
lastFolderPath = "";
Log.d("Directory ", inFile.getPath());
listAllMusicFiles(inFile.getPath());
} else {
if (inFile.getAbsolutePath().endsWith(".mp3") || inFile.getAbsolutePath().endsWith(".MP3")) {
mp3Count++;
Log.wtf("MP3 Count", mp3Count + " ");
//add each folder only once
String folderName = inFile.getParentFile().getName();
String folderPath = inFile.getParentFile().getPath();
Log.e("FOUND in", folderPath);
//create a new Folder object
Folder currentFolder = new Folder(folderName, folderPath, mp3Count + "");
if (!lastFolderPath.equals(folderPath)) {
Log.d("NEW", folderPath);
lastFolderPath = folderPath;
folderArrayList.add(currentFolder);
} else {
Log.d("OLD", folderPath);
//find a Folder object in folderArrayList where the object's path matches current folderPath
for (Folder folder : folderArrayList) {
String currentPath = folder.getFolder_Path();
if (currentPath.equals(folderPath)) {
//found a match
//update count
folder.setFolder_Song_Count(mp3Count + "");
}
}
}
}
}
}
}
When I run this code on my device, I am able to list the required folders in a RecyclerView, but with a delay of about 6-7 seconds.
I have already moved this task into an AsyncTask, so that my UIThread does not hang because of this intensive operation.
But I am totally at a loss when it comes to improving File System Performance. Kindly help. Thanks !
Instead of storing currentFolder in an ArrayList and in the next step iterating through complete list to find that folder and updating the value, you can simply use HashMap like this
HashMap<String, Folder> folders = new HashMap<>();
public void listAllMusicFiles(String pathToDirectory) {
int mp3Count = 0;
File f = new File(pathToDirectory);
File[] files = f.listFiles();
Folder folder;
String folderName, folderPath;
for (File inFile : files) {
if (inFile.isDirectory()) {
//reset last folder path
Log.d("Directory ", inFile.getPath());
listAllMusicFiles(inFile.getPath());
} else {
if (inFile.getAbsolutePath().endsWith(".mp3") || inFile.getAbsolutePath().endsWith(".MP3")) {
mp3Count++;
Log.wtf("MP3 Count", mp3Count + " ");
//add each folder only once
folderName = inFile.getParentFile().getName();
folderPath = inFile.getParentFile().getPath();
Log.e("FOUND in", folderPath);
if (folders.containsKey(folderPath)) {
folder = folders.get(folderPath);
folder.setFolder_Song_Count(mp3Count + "");
folders.put(folderPath, folder);
} else {
folder = new Folder(folderName, folderPath, mp3Count + "");
folders.put(folderPath, folder);
}
}
}
}
}
I have my GWT project and I want to upload files to server. I want the following algorithm to work
1) create a folder with the name from "userNumber"
2) write uploaded files to this folder
3) add folder to zip
4) delete folder (if exists)
As I write on the server side I think it is just java problem. Here is my code. I can perform only the first and the second steps, i.e. I can create a folder and write files to this folder.
#Override
public String executeAction(HttpServletRequest request,
List<FileItem> sessionFiles) throws UploadActionException {
String response = "";
userNumber = request.getParameter("userNumber");
File f = new File(ConfAppServer.getRealContextPath() + "/edoc/"
+ userNumber);
if (f.mkdir()) {
System.out.println("Directory Created");
} else {
System.out.println("Directory is not created");
}
for (FileItem item : sessionFiles) {
if (false == item.isFormField()) {
try {
String extension = item.getName().substring(
item.getName().length() - 3);
File file = null;
file = new File(ConfAppServer.getRealContextPath()
+ "/edoc/"
+ userNumber
+ System.getProperty("file.separator")
+ item.getName().substring(0,
item.getName().length() - 4) + "."
+ extension);
item.write(file);
receivedFiles.put(item.getFieldName(), file);
receivedContentTypes.put(item.getFieldName(),
item.getContentType());
response += "<file-" + cont + "-field>"
+ item.getFieldName() + "</file-" + cont
+ "-field>\n";
response += "<file-" + cont + "-name>" + item.getName()
+ "</file-" + cont + "-name>\n";
response += "<file-" + cont + "-size>" + item.getSize()
+ "</file-" + cont + "-size>\n";
response += "<file-" + cont + "-type>"
+ item.getContentType() + "</file-" + cont
+ "type>\n";
} catch (Exception e) {
throw new UploadActionException(e);
}
}
}
ZipUtils appZip = new ZipUtils(userNumber + ".zip",
ConfAppServer.getRealContextPath() + "/edoc/" + userNumber);
appZip.generateFileList(new File(ConfAppServer.getRealContextPath()
+ "/edoc/" + userNumber));
appZip.zipIt(userNumber + ".zip");
f.delete();
removeSessionFileItems(request);
return "<response>\n" + response + "</response>\n";
}
Here you can find my ZipUtils class.
When I try to delete my folder, nothing happens. The delete() method doesn't work. Help me please!!
My question is how to add folder to zip and then delete this folder.
Use java.nio.file. You won't have the hassle of manipulating the ZIP API yourself:
final Path pathToZip = Paths.get("path", "to", "your", "zip");
final URI uri = URI.create("jar:" + pathToZip.toUri());
final Map<String, ?> env = Collections.singletonMap("create", "true");
try (
final FileSystem fs = FileSystems.getFileSystem(uri, env);
) {
// write files into the zip here.
// See javadoc for java.nio.file.Files and FileSystem.getPath()
}
More details on how to use the API here.
Hi guys I needed to create a method to display current directory, files, subdirectories and the files of those subdirectories given a file the user has to choose. I accomplished the task and the fallowing code is printing the appropriated output. It is printing from the f.getParentFile() down, that is what want. Now I want to use recursion instead. I am trying to learn the concept of recursion. I know you need a base case and then your inductive step, but when I try to modify my code into recursive I get an infinite loop when it hits the first subdirectory. Any feedback will be appreciated.
NON-Recursive Working code
static void listFiles(File f)
{
try
{
if (f.exists())
{
File dir = f.getParentFile();
if (dir.isDirectory())
{
System.out.println("Directory: " + dir );
File[] list = dir.listFiles();
for (int i = 0; i < list.length; i++)
{
if (list[i].isDirectory())
{
System.out.println("\tSubdirectory: " + list[i].getName() + "\tsize :" + (list[i].length()/1024) + "KB" );
File[] listFiles = list[i].getAbsoluteFile().listFiles();
for (int j = 0; j < listFiles.length; j++)
{
System.out.println("\t\tSubdirectory files: " + listFiles[j].getName() + "\tsize :" + (listFiles[j].length()/1024) + "KB" );
}
}
else if (list[i].isFile())
{
System.out.println("\tFiles: " + list[i].getName() + "\tsize :" + (list[i].length()/1024) + "KB" );
}
}
}
}
else throw new FileNotFoundException("File ******** does not exists");
}
catch(NullPointerException | FileNotFoundException e)
{
e.printStackTrace();
}
}
Attempting Recursion
static void listFiles(File f)
{
try
{
if (f.exists())
{
File dir = f.getParentFile();
if (dir.isDirectory())
{
System.out.println("Directory: " + dir );
File[] list = dir.listFiles();
for (int i = 0; i < list.length; i++)
{
if (list[i].isDirectory())
{
System.out.println("\tSubdirectory: " + list[i].getName() + "\tsize :" + (list[i].length()/1024) + "KB" );
listFiles(list[i].getAbsoluteFile());
}
else if (list[i].isFile())
{
System.out.println("\tFiles: " + list[i].getName() + "\tsize :" + (list[i].length()/1024) + "KB" );
}
}
}
}
else throw new FileNotFoundException("File ******** does not exists");
}
catch(NullPointerException | FileNotFoundException e)
{
e.printStackTrace();
}
}
It is really really simple :)
public static void main(String[] args) {
filesInFolder("./");
}
public static void filesInFolder(String filename) {
File dir = new File(filename);
for (File child : dir.listFiles()) {
System.out.println(child.getAbsolutePath());
if (child.isDirectory()){
filesInFolder(child.getAbsolutePath());
}
}
}