Well, it is as simple as the title.
I tried for many hours to make a method that will take the archive file and a File[] (the files that will be added to the archive) and I only made it to the point that the method adds new files into the archive, but if a file with the same name of a file that I'm trying to add already exists, it throws me an error.
I tried searching for a solution but didn't find any.
Can you help me make a method that will take two parameters: File archive, File[] fileToAdd. That will add files to an archive and if needed will override existing files?
Thank you, TheRedCoder
Edit:
Here is my current code
public static void addFilesToZip(File zipFile, File[] files) throws IOException {
File tempFile = File.createTempFile(zipFile.getName(), null);
tempFile.delete();
boolean renameOk = zipFile.renameTo(tempFile);
if (!renameOk) {
throw new RuntimeException(
"could not rename the file " + zipFile.getAbsolutePath() + " to " + tempFile.getAbsolutePath());
}
byte[] buf = new byte[1024];
ZipInputStream zin = new ZipInputStream(new FileInputStream(tempFile));
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));
ZipEntry entry = zin.getNextEntry();
while (entry != null) {
File file = null;
String name = entry.getName();
boolean notInFiles = true;
for (File f : files) {
if (f.getName().equals(name)) {
notInFiles = false;
file = f;
break;
}
}
if (notInFiles) {
out.putNextEntry(new ZipEntry(name));
int len;
while ((len = zin.read(buf)) > 0) {
out.write(buf, 0, len);
}
} else {
/**
*
* I'm stuck here, what should i do here?
*
*/
}
entry = zin.getNextEntry();
}
zin.close();
for (int i = 0; i < files.length; i++) {
InputStream in = new FileInputStream(files[i]);
out.putNextEntry(new ZipEntry(files[i].getName()));
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
out.closeEntry();
in.close();
}
out.close();
tempFile.delete();
}
Related
I need to zip a 30MB file into different zip files which have a limit of 5MB per zip file.
My work will stop to zip after the size is larger than the limit now. I referenced and tried some examples but made me feel confused.
Please give me suggestions. Thank you.
public static void zipDirectory(File dir, File zipFile, boolean contentOnly)
throws IOException {
synchronized (syncObj) {
FileOutputStream fout = new FileOutputStream(zipFile);
ZipOutputStream zout = new ZipOutputStream(fout);
if (contentOnly)
zipSubDirectory("", dir, zout);
else
zipSubDirectory(dir.getName() + "/", dir, zout);
zout.close();
}
}
private static void zipSubDirectory(String basePath, File dir,
ZipOutputStream zout) throws IOException {
synchronized (syncObj) {
byte[] buffer = new byte[4096];
final long MAX_ZIP_SIZE = 5000000;
long currentSize = 0;
int zipSplitCount = 0;
ZipEntry zipEntry;
FileInputStream entryFile;
File[] files = dir.listFiles();
for (File file : files) {
zipEntry = new ZipEntry(basePath + file.getName());
if (file.isDirectory()) {
String path = basePath + file.getName() + "/";
zout.putNextEntry(new ZipEntry(path));
zipSubDirectory(path, file, zout);
zout.closeEntry();
} else {
if (currentSize >= MAX_ZIP_SIZE) {
zipSplitCount++;
zout.close();
zout = new ZipOutputStream(new FileOutputStream(file.getName().replace(".zip", ".zip." + zipSplitCount)));
currentSize = 0;
}
zout.putNextEntry(zipEntry);
FileInputStream fin = new FileInputStream(file);
int length;
while ((length = fin.read(buffer)) > 0) {
zout.write(buffer, 0, length);
}
zout.closeEntry();
fin.close();
}
currentSize += zipEntry.getCompressedSize();
}
}
}
I'm trying to figure out how to paste files into a folder inside .zip file. I'm using the code below just to add a file into zip, but not a specific folder within it. I'm not allowed to unzip this file. I have some basic text files to replace the files already existing with same name in the zip.
How to modify this method to choose a specific folder inside zip? Thanks!
public static void addFilesToExistingZip(File zipFile, File[] files) throws IOException {
File tempFile = File.createTempFile(zipFile.getName(), null);
tempFile.delete();
zipFile.renameTo(tempFile);
byte[] buf = new byte[1024];
ZipInputStream zin = new ZipInputStream(new FileInputStream(tempFile));
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));
ZipEntry entry = zin.getNextEntry();
while (entry != null) {
String name = entry.getName();
boolean notInFiles = true;
for (File f : files) {
if (f.getName().equals(name)) {
notInFiles = false;
break;
}
}
if (notInFiles) { // Add ZIP entry to output stream.
out.putNextEntry(new ZipEntry(name)); // Transfer bytes from the ZIP file to the output file
int len;
while ((len = zin.read(buf)) > 0) {
out.write(buf, 0, len);
}
}
entry = zin.getNextEntry();
} // Close the streams
zin.close(); // Compress the files
for (int i = 0; i < files.length; i++) {
InputStream in = new FileInputStream(files[i]); // Add ZIP entry to output stream.
out.putNextEntry(new ZipEntry(files[i].getName())); // Transfer bytes from the file to the ZIP file
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
} // Complete the entry
out.closeEntry();
in.close();
} // Complete the ZIP file
out.close();
tempFile.delete();
}
I have this updater class that updates my program by unzipping a zip file. It works good except when I add in a folder for it to extract.. I have included the 3 methods that I use to accomplish this but the problem must lie in the unzip() method.
Once it prints Extracting: New folder/TEST2.txt it makes the error posted below. I have tried making the folder without spaces and it throws the same error. The contests of the zip file are just 2 text files and a folder.
Structure of zip:
New Folder >Test2.txt
Test1.txt
Errors:
java.io.IOException: The system cannot find the path specified at
java.io.WinNTFileSystem.createFileExclusively(Native Method) at
java.io.File.createNewFile(Unknown Source) at
update.Main_Gui.unzip(Main_Gui.java:244) at
update.Main_Gui.access$3(Main_Gui.java:230) at
update.Main_Gui$3.run(Main_Gui.java:108) at
java.lang.Thread.run(Unknown Source)
Code:
private void copyFiles(File f, String dir) throws IOException {
File[] files = f.listFiles();
for (File ff : files) {
if (ff.isDirectory()) {
new File(dir + "/" + ff.getName()).mkdir();
copyFiles(ff, dir + "/" + ff.getName());
} else {
copy(ff.getAbsolutePath(), dir + "/" + ff.getName());
}
}
}
public void copy(String srFile, String dtFile)
throws FileNotFoundException, IOException {
File f1 = new File(srFile);
File f2 = new File(dtFile);
InputStream in = new FileInputStream(f1);
OutputStream out = new FileOutputStream(f2);
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
in.close();
out.close();
}
private void unzip() throws IOException {
int BUFFER = 2048;
BufferedOutputStream dest = null;
BufferedInputStream is = null;
ZipEntry entry;
ZipFile zipfile = new ZipFile("update.zip");
Enumeration e = zipfile.entries();
(new File(root)).mkdir();
while (e.hasMoreElements()) {
entry = (ZipEntry) e.nextElement();
outText.setText(outText.getText() + "\nExtracting: " + entry);
if (entry.isDirectory())
(new File(root + entry.getName())).mkdir();
else {
(new File(root + entry.getName())).createNewFile();
is = new BufferedInputStream(zipfile.getInputStream(entry));
int count;
byte data[] = new byte[BUFFER];
FileOutputStream fos = new FileOutputStream(root
+ entry.getName());
dest = new BufferedOutputStream(fos, BUFFER);
while ((count = is.read(data, 0, BUFFER)) != -1) {
dest.write(data, 0, count);
}
//zipfile.close();
dest.flush();
dest.close();
is.close();
}
}
}
I'm having an issue zipping up folders.
I.e. I'll have a folder like this
C:\Lazy\Test
containing files File1.cpp, File2.hpp,.. etc
The zipped up folder looks like C:\Lazy\Test.zip -> Lazy\Test which contains all the cpp and hpp files.
I want to remove the extra subfolders (Lazy\Test) that get created. Why is this happening?
In other words, the zipped up files are not directly underneath the zip file, I have to navigate two more folders to get to them.
Where can I find this issue in the code?
private void zipDirectory() {
File lazyDirectory = new File(defaultSaveLocation);
File[] files = lazyDirectory.listFiles();
for (File file : files) {
if (file.isDirectory()) {
System.out.println("Zipping up " + file);
zipContents(file);
}
}
}
public static void addToZip(String fileName, ZipOutputStream zos) throws FileNotFoundException, IOException {
System.out.println("Writing '" + fileName + "' to zip file");
File file = new File(fileName);
FileInputStream fis = new FileInputStream(file);
ZipEntry zipEntry = new ZipEntry(fileName);
zos.putNextEntry(zipEntry);
byte[] bytes = new byte[1024];
int length;
while ((length = fis.read(bytes)) >= 0) {
zos.write(bytes, 0, length);
}
zos.closeEntry();
fis.close();
}
public static void zipContents(File dirToZip) {
List<File> fileList = new ArrayList<File>();
File[] filesToZip = dirToZip.listFiles();
for (File zipThis : filesToZip) {
String ext = "";
int i = zipThis.toString().lastIndexOf('.');
if (i > 0) {
ext = zipThis.toString().substring(i+1);
}
if(ext.matches("cpp|bem|gz|h|hpp|pl|pln|ppcout|vec|xml|csv")){
fileList.add(zipThis);
}
}
try {
FileOutputStream fos = new FileOutputStream(dirToZip.getName() + ".zip");
ZipOutputStream zos = new ZipOutputStream(fos);
for (File file : fileList) {
addToZip(file.toString(), zos);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Change the addToZip file to take File object. Use it to open the file stream, but only use File#getName to create the ZipEntry, as follows...
public static void addToZip(File file, ZipOutputStream zos) throws FileNotFoundException, IOException {
System.out.println("Writing '" + fileName + "' to zip file");
FileInputStream fis = new FileInputStream(file);
ZipEntry zipEntry = new ZipEntry(file.getName());
zos.putNextEntry(zipEntry);
byte[] bytes = new byte[1024];
int length;
while ((length = fis.read(bytes)) >= 0) {
zos.write(bytes, 0, length);
}
zos.closeEntry();
fis.close();
}
That's it. I have a text file, and I need to move it to a (existing) Zip File in a given directory.
File file = new File("C:\\afolder\\test.txt");
File dir = new File(directoryToGo+"existingzipfile.zip");
boolean success = file.renameTo(new File(dir, file.getName()));
But it does not work. Is there a way to move a file into a existing Zip File?
Thank you.
Hmm you could use something like:
public static void addFilesToExistingZip(File zipFile, File[] files) throws IOException {
// get a temp file
File tempFile = File.createTempFile(zipFile.getName(), null);
// delete it, otherwise you cannot rename your existing zip to it.
tempFile.delete();
boolean renameOk = zipFile.renameTo(tempFile);
if (!renameOk) {
throw new RuntimeException(
"could not rename the file " + zipFile.getAbsolutePath() + " to " + tempFile.getAbsolutePath());
}
byte[] buf = new byte[1024];
ZipInputStream zin = new ZipInputStream(new FileInputStream(tempFile));
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));
ZipEntry entry = zin.getNextEntry();
while (entry != null) {
String name = entry.getName();
boolean notInFiles = true;
for (File f : files) {
if (f.getName().equals(name)) {
notInFiles = false;
break;
}
}
if (notInFiles) { // Add ZIP entry to output stream.
out.putNextEntry(new ZipEntry(name)); // Transfer bytes from the ZIP file to the output file
int len;
while ((len = zin.read(buf)) > 0) {
out.write(buf, 0, len);
}
}
entry = zin.getNextEntry();
} // Close the streams
zin.close(); // Compress the files
for (int i = 0; i < files.length; i++) {
InputStream in = new FileInputStream(files[i]); // Add ZIP entry to output stream.
out.putNextEntry(new ZipEntry(files[i].getName())); // Transfer bytes from the file to the ZIP file
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
} // Complete the entry
out.closeEntry();
in.close();
} // Complete the ZIP file
out.close();
tempFile.delete();
}
Reference:
http://www.dzone.com/snippets/adding-files-existing-jar-file
You'll need to build a new zip file:
Open the existing zip file for reading
Open a new zip file for writing
Copy all the entries from the old zip file to the new one, ignoring an entry corresponding to your extra file, if there is one
Add your extra file
Close both the input and the output files
Delete the old zip file
Rename the new zip file to the old one's name
Starting with Java 7 you have a zip filesystem provider which allows you to write this code:
final Path src = Paths.get("c:\\afolder\\test.txt");
final String filename = src.getFileName().toString();
final Path zip = Paths.get(directoryToGo, "existingzipfile.zip");
final URI uri = URI.create("jar:" + zip.toUri());
final Map<String, ?> env = Collections.emptyMap();
try (
final FileSystem zipfs = FileSystems.newFileSystem(uri, env);
) {
Files.move(src, zipfs.getPath("/" + filename),
StandardCopyOption.REPLACE_EXISTING);
}
You can do like this, here uploadPath+fileName is filename with its path:
String FileName="Urzip file name. zip";
FileOutputStream outputStream = new FileOutputStream(uploadPath+fileName);
ZipOutputStream zipFile = new ZipOutputStream(outputStream);
byte[] buffer = new byte[1024];
// Then, here I have list of pdf files in a LIST:
// continuation ...
for (int i = 0; i < filename.size(); i++) {
String file = filename.get(i);
FileInputStream input = new FileInputStream(uploadPath+file);
ZipEntry entry = new ZipEntry(file);
zipFile.putNextEntry(entry);
int len;
while ((len = input.read(buffer)) > 0) {
zipFile.write(buffer, 0, len);
}
zipFile.closeEntry();
input.close();
}
// Next, here "downFile" is the other file which you have to add in your existing zip:
// continuation ...
FileInputStream input = new FileInputStream(uploadPath+downFile);
ZipEntry e = new ZipEntry(downFile);
zipFile.putNextEntry(e);
int len;
while ((len = input.read(buffer)) > 0) {
zipFile.write(buffer, 0, len);
}
zipFile.closeEntry();
input.close();
zipFile.close();
Adding the class to move the file to inside jar/zip folder based on accepted answer.
The accepted answer didn't hold full executable code ,So i have added the class which helps to move/copy the file to jar/zip
package ZipReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
public class ZipWrite {
public static void main(String args[]) throws IOException
{
File file=new File("F:/MyProjects/New folder/mysql-connector-java-5.1.18-bin.jar");
File filetoPush=new File("F:/MyProjects/New folder/BestResponseTimeBalanceStrategy.class");
File[] files=new File[1];
files[0]=filetoPush;
addFilesToExistingZip(file,files);
}
public static void addFilesToExistingZip(File zipFile, File[] files)
throws IOException {
// get a temp file
File tempFile = File.createTempFile(zipFile.getName(), null);
// delete it, otherwise you cannot rename your existing zip to it.
tempFile.delete();
boolean renameOk = zipFile.renameTo(tempFile);
if (!renameOk) {
throw new RuntimeException("could not rename the file "
+ zipFile.getAbsolutePath() + " to "
+ tempFile.getAbsolutePath());
}
byte[] buf = new byte[1024];
ZipInputStream zin = new ZipInputStream(new FileInputStream(tempFile));
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));
ZipEntry entry = zin.getNextEntry();
while (entry != null) {
String name = entry.getName();
boolean notInFiles = true;
for (File f : files) {
if (f.getName().equals(name)) {
System.out.println(name);
notInFiles = false;
break;
}
}
if (notInFiles) {
System.out.println("adding");
// Add ZIP entry to output stream.
out.putNextEntry(new ZipEntry(name)); // Transfer bytes from the
// ZIP file to the
// output file
int len;
while ((len = zin.read(buf)) > 0) {
out.write(buf, 0, len);
}
}
entry = zin.getNextEntry();
} // Close the streams
zin.close(); // Compress the files
for (int i = 0; i < files.length; i++) {
FileInputStream in = new FileInputStream(files[i]);
// Add ZIP entry to output stream.
System.out.println("files[i].getName()-->"+files[i].getName());
out.putNextEntry(new ZipEntry("com/mysql/jdbc/util/"+files[i].getName()));
// Transfer bytes from the file to the ZIP file
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
// Complete the entry
out.closeEntry();
in.close();
}
// Complete the ZIP file
out.close();
tempFile.delete();
}
}