I have this code for saving to a text file however, I can't seem to find a way to make it save to not the user.home folder but to another folder on my hard drive. I searched in many places but couldn't really find anything that could help me.
It works with the user.home setting but if I try to change it, it doesn't. The program, when executed, comes up with Source not found.
saveBtn.setOnAction(new EventHandler<ActionEvent>()
{
public void handle(ActionEvent event)
{
Object source = event.getSource();
String s = null;
//Variable to display text read from file
if (_clickMeMode) {
FileOutputStream out = null;
try {
//Code to write to file
String text = titleField.getText();
byte b[] = text.getBytes();
String outputFileName = System.getProperty("user.home"
+ File.separatorChar+"home")
+ File.separatorChar + "Movies2.txt";
out = new FileOutputStream(outputFileName);
out.write(b);
out.close();
//Clear text field
titleField.setText("");
}catch (java.io.IOException e) {
System.out.println("Cannotss text.txt");
} finally {
try {
out.close();
} catch (java.io.IOException e) {
System.out.println("Cannote");
}
}
}
else
{
//Save text to file
_clickMeMode = true;
}
window.setTitle("Main Screen");
window.setScene(mainScreen);
}
});
Your file name is incorrectly assigned:
String outputFileName = System.getProperty("user.home"
+ File.separatorChar+"home")
+ File.separatorChar + "Movies2.txt";
You are passing a string of the form "user.home/home" to System.getProperty().
Since there is no such property, this will return null.
Then you concatenate this with /Movies2.txt, so outputFileName will be something like null/Movies2.txt.
(A simple System.out.println(outputFileName) will confirm this.)
Instead of building the filename by hand like this, you should use a higher-level API to do it. E.g.:
Path outputFile = Paths.get(System.getProperty("user.home"), "home", "Movies2.txt");
OutputStream out = Files.newOutputStream(outputFile);
out.write(b);
If you also need (or might need) to create the directory, you can do
Path outputDir = Paths.get(System.getProperty("user.home"), "home");
Files.createDirectories(outputDir);
Path outputFile = outputDir.resolve("Movies2.txt");
OutputStream out = Files.newOutputStream(outputFile);
out.write(b);
Related
I want to download few files from a URL. I know the starting of the file name. But the next part would be different. Mostly a date. But it could be different for different files. From Java code, is there any way to download file with matching pattern?
If I hit the below URL in chrome, all the files are listed and I have to download the required files manually.
http://<ip_address>:<port>/MR/build/report/scan/daily/2021-12-13_120/data/
File names can b like below. It will have known file name and date. The date can be different. Either the same as in URL or some older one.
scan_report_2021_12_13_120.txt
build_report_2021_12_10_110.txt
my_reportdata_2021_11_30_110.txt
As of now, my Java code is like below. I have to pass the complete URL with exact file name to download the files. Most of the cases it would be same as the date and number in URL. So in the program I take the date part from URL and add it to my file name nd pass as the URL. But for some files it might change and for those I have to manually download.
private static void downloadFile(String remoteURLPath, String localPath) {
System.out.println("DownloadFileTest.downloadFile() Downloading from " + remoteURLPath + " to = " + localPath);
FileOutputStream fos = null;
try {
URL website = new URL(remoteURLPath);
ReadableByteChannel rbc = Channels.newChannel(website.openStream());
fos = new FileOutputStream(localPath);
fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
The argument remoteURLPath is passed like http://<ip_address>:<port>/MR/build/report/scan/daily/2021-12-13_120/data/scan_report_2021_12_13_120.txt
And localPath is passed like C:\\MyDir\\MyData\\scan_report_2021_12_13_120.txt
Similarly other files also with date as 2021_12_13_120. Other files wont get downloaded. But will create empty file in the same directory which I will delete later since size is 0.
Is there any way we can pass pattern here?
Like http://<ip_address>:<port>/MR/build/report/scan/daily/2021-12-13_120/data/scan_report_*.txt
And instead of passing complete local path, is there any way to pass only directory where the file should get downloaded with exact same name as in the remote system?
In Linux I can use wget with pattern matching. But was looking for Java way to download in all platforms.
wget -r -np -nH --cut-dirs=10 -A "scan_report*.txt" "http://<ip_address>:<port>/MR/build/report/scan/daily/2021-12-13_120/data/"
Thanks to comment from #FedericoklezCulloca. I modified my code using this answer
The solution I did is read all html page and get all href values as it had only the file names with extension. From there I had another list which I used to get the matching files and those I downloaded then using my code in the Question.
Method to get all href list from URL. may be optimisation can be done. Also I did not use any extra library.
private static List<String> getAllHREFListFromURL(String downloadURL) {
URL url;
InputStream is = null;
List<String> hrefListFromURL = new ArrayList<>();
try {
url = new URL(downloadURL);
is = url.openStream();
byte[] buffer = new byte[1024];
int bytesRead = -1;
StringBuilder page = new StringBuilder(1024);
while ((bytesRead = is.read(buffer)) != -1) {
String str = new String(buffer, 0, bytesRead);
page.append(str);
}
StringBuilder htmlPage = new StringBuilder(page);
String search_start = "href=\"";
String search_end = "\"";
while (!htmlPage.isEmpty()) {
int indexOf = htmlPage.indexOf(search_start);
if (indexOf != -1) {
String substring = htmlPage.substring(indexOf + search_start.length());
String linkName = substring.substring(0, substring.indexOf(search_end));
hrefListFromURL.add(linkName);
htmlPage = new StringBuilder(substring);
} else {
htmlPage = new StringBuilder();
}
}
} catch (MalformedURLException e1) {
e1.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
} finally {
try {
is.close();
} catch (Exception e) {
}
}
return hrefListFromURL;
}
Method to get list of files that I needed.
private static List<String> getDownloadList(List<String> allHREFListFromURL) {
List<String> filesList = getMyFilesList();
List<String> downloadList = new ArrayList<>();
for (String fileName : filesList) {
Predicate<String> fileFilter = Pattern.compile(fileName + "*").asPredicate();
List<String> collect = allHREFListFromURL.stream().filter(fileFilter).collect(Collectors.toList());
downloadList.addAll(collect);
}
return downloadList;
}
private static List<String> getMyFilesList() {
List<String> filesList = new ArrayList<>();
filesList.add("scan_report");
filesList.add("build_report");
filesList.add("my_reportdata");
return filesList;
}
The downloadList I iterate and uses my original download method to download.
This is my Code inside myDir.mkdirs(); this code show me that warning of Result of File.mkdirs() is ignored.
I try to fix this Warning but I failed.
private void saveGIF() {
Toast.makeText(getApplicationContext(), "Gif Save", Toast.LENGTH_LONG).show();
String filepath123 = BuildConfig.VERSION_NAME;
try {
File myDir = new File(String.valueOf(Environment.getExternalStorageDirectory().toString()) + "/" + "NewyearGIF");enter code here
//My Statement Code This Line Show Me that Warning
myDir.mkdirs();
File file = new File(myDir, "NewyearGif_" + System.currentTimeMillis() + ".gif");
filepath123 = file.getPath();
InputStream is = getResources().openRawResource(this.ivDrawable);
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] img = new byte[AccessibilityNodeInfoCompat.ACTION_NEXT_HTML_ELEMENT];
while (true) {
int current = bis.read();
if (current == -1) {
break;
}
baos.write(current);
}
FileOutputStream fos = new FileOutputStream(file);
fos.write(baos.toByteArray());
fos.flush();
fos.close();
is.close();
} catch (Exception e) {
e.printStackTrace();
}
Intent mediaScanIntent = new Intent("android.intent.action.MEDIA_SCANNER_SCAN_FILE");
mediaScanIntent.setData(Uri.fromFile(new File(filepath123)));
sendBroadcast(mediaScanIntent);
}
The method mkdirs has a boolean return value, which you didn't use.
boolean wasSuccessful = myDir.mkdirs();
The create operation returns a value, which indicates if the creation of the directory was successful. For example, the result value wasSuccessful can be used to display an error when it is false.
if (!wasSuccessful) {
System.out.println("was not successful.");
}
From the Java docs about the boolean return value:
true if and only if the directory was created, along with all
necessary parent directories; false otherwise
File CDir = new File(Environment.getExternalStorageDirectory(), IMPORT_DIRECTORY);
if (!CDir.exists()) {
boolean mkdir = CDir.mkdir();
if (!mkdir) {
Log.e(TAG, "Directory creation failed.");
}
}
mkdir return a Boolean value. we need to catch the return value from mkdir .Replace your code with this and check (warning of Result of File.mkdirs() is ignored.) will be gone
The idea behind the return-value of mkdir is, that every IO-Operation could fail and your program should react to this situation.
You can do:
if(myDirectory.exists() || myDirectory.mkdirs()) {
// Directory was created, can do anything you want
}
or you can just remove the warning using:
#SuppressWarnings("ResultOfMethodCallIgnored")
The mkdirs method checks if file exists but returns false if the directory was already created so you should check one more time using first method.
File myDirectory = new File(Environment.getExternalStorageDirectory(),"NewyearGIF");
if(!myDirectory.exists()) {
myDirectory.mkdirs();
}else{
// Directory already exist
}
This is a old question but still, the simplest way I've found is:
File imageThumbsDirectory = getBaseContext.getExternalFilesDir("ThumbTemp");
if(imageThumbsDirectory != null) {
if (!imageThumbsDirectory.exists()) {
if (imageThumbsDirectory.mkdir()) ; //directory is created;
}
}
Just put this code:
File myDirectory = new File(Environment.getExternalStorageDirectory(),"NewyearGIF");
if(!myDirectory.exists()) {
myDirectory.mkdirs();
}else{
// Directory already exist
}
If application running in above Lollipop, then you need to add runtime permission for storage.
I want to copy a annotated file, and replace those annotations in the new copy. However I am struggling on how to do the replacing. I am currently reading the whole file into a string and replacing the annotations before saving the string to a new file:
String file = null;
void openAnnotatedSource(String path){
byte[] encoded = null;
try {
encoded = Files.readAllBytes(Paths.get(anotatedpath + "/" + path));
} catch(Exception e) {
System.out.println("Error opening annotated source.");
}
file = new String(encoded, StandardCharsets.UTF_8);
}
void replaceAnotation(String anotation, String config){
file = file.replace(anotation, config);
}
void replaceAnotation(String anotation, int config){
file = file.replace(anotation, String.valueOf(config));
}
void createFinalSource(String path){
try{
Files.write(Paths.get(targetpath + "/" + path), file.getBytes());
} catch(Exception e) {
System.out.println("Couldnt create " + targetpath + "/" + path);
}
}
I don't know if I'm doing this correctly because having the file the whole time as a string does not seem correct to me.
Any decent text editor has a search&replace facility that supports regular expressions.
If however, you have reason to reinvent the wheel in Java, the approach you followed is a decent way, you are writing the modified contents into a different new file, so reading the contents from source file into a string and modifying the contents of string and creating a new file with updated string does not cause any problems.
This is a function I have written that tries to:
Create a folder with the users name
Save a .jpg inside of that
folder
The folder creation works fine, however when I try to save the pictures, they all save with the correct name, however they do not save in their intended folders. In other words, instead of having a folder containing a bunch of folders each containing one picture, I have one folder containing a bunch of empty folders, and a bunch of pictures all outside their folders (I can clarify if needed).
This is my code:
public void addToDir(List<Contact> list){
for(int i = 0; i < list.size(); i++){
String nameOfFolder = list.get(i).getName();
Bitmap currentBitmap = list.get(i).getBusiness_card();
String conName = Environment.getExternalStorageDirectory() + File.separator + "MyApp" + File.separator +
"Connected Accounts" + File.separator + nameOfFolder;
File conDir = new File(conName);
if (!conDir.mkdirs()) {
if (conDir.exists()) {
} else {
return;
}
}
try {
FileOutputStream fos = new FileOutputStream(conName + ".jpg", true);
currentBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (Exception e) {
Log.e("MyLog", e.toString());
}
}
}
I suspect the problem is with the FileOutputStream path, but I am not sure how to set it so that it is set to the folder I just created.
Much appreciated
This is how to define mFileTemp
String state = Environment.getExternalStorageState();
File mFileTemp;
if (Environment.MEDIA_MOUNTED.equals(state)) {
//this is like that
//directory : any folder name/you can add inner folders like that/your photo name122412414124.jpg
mFileTemp = new File(Environment.getExternalStorageDirectory()+File.separator+"any folder name"+File.separator+"you can add inner folders like that"
, "your photo name"+System.currentTimeMillis()+".jpg");
mFileTemp.getParentFile().mkdirs();
}
else {
mFileTemp = new File(getFilesDir()+"any folder name"+
File.separator+"myphotos")+File.separator+"profilephotos", "your photo name"+System.currentTimeMillis()+".jpg");
mFileTemp.getParentFile().mkdirs();
This is how i save any image
try {
InputStream inputStream = getContentResolver().openInputStream(data.getData());
FileOutputStream fileOutputStream = new FileOutputStream(mFileTemp);
copyStream(inputStream, fileOutputStream);
fileOutputStream.close();
inputStream.close();
} catch (Exception e) {
Log.e("error save", "Error while creating temp image", e);
}
And copyStream method
public static void copyStream(InputStream input, OutputStream output) throws IOException {
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = input.read(buffer)) != -1) {
output.write(buffer, 0, bytesRead);
}
}
I would like to access the jar file on the repository, search inside it for the certain files, retrieve those files and store them on my hard disc. I don't want to download the whole jar and then to search for it.
So let's assume I have the address of the Jar. Can someone provide me with the code for the rest of the problem?
public void searchInsideJar(final String jarUrl, final String artifactId,
final String artifactVersion) {
InputStream is = null;
OutputStream outStream = null;
JarInputStream jis = null;
int i = 1;
try {
String strDirectory = "C:/Users/ilijab/" + artifactId +artifactVersion;
// Create one directory
boolean success = (new File(strDirectory)).mkdir();
if (success) {
System.out.println("Directory: " + strDirectory + " created");
}
is = new URL(jarUrl).openStream();
jis = new JarInputStream(is);
while (true) {
JarEntry ent = jis.getNextJarEntry();
if (ent == null) {
break;
}
if (ent.isDirectory()) {
continue;
}
if (ent.getName().contains("someFile")) {
outStream = new BufferedOutputStream(new FileOutputStream(
strDirectory + "\\" + "someFile" + i));
while(ent.)
System.out.println("**************************************************************");
System.out.println(i);
i++;
}
}
} catch (Exception ex) {
}
}
So, in upper code, how can I save the file I found(the last if) into directory.
Assuming that by "repository", you mean a Maven repository, then i'm afraid this can't be done. Maven repositories let you download artifacts, like jar files, but won't look inside them for you.