Am new to Java, I searched in google for unzipping the files. Tested the code in my local and am able to unzip the files.
But unable to delete the files I tried some logic but no luck.
Can anyone help me how read a particular file and delete that file using its path and also need to delete a specific folder using its path and delete recursively. all the other files need to be there
Below is the code:
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class UnzipFiles {
public static void main(String[] args) {
String zipFilePath = "/Users/Safeer_Pasha/Music/archive.zip";
String destDir = "/Workspace/";
unzip(zipFilePath, destDir);
}
private static void unzip(String zipFilePath, String destDir) {
File dir = new File(destDir);
// create output directory if it doesn't exist
if(!dir.exists()) dir.mkdirs();
FileInputStream fis;
//buffer for read and write data to file
byte[] buffer = new byte[1024];
try {
fis = new FileInputStream(zipFilePath);
ZipInputStream zis = new ZipInputStream(fis);
ZipEntry ze = zis.getNextEntry();
while(ze != null){
String fileName = ze.getName();
File newFile = new File(destDir + File.separator + fileName);
System.out.println("Unzipping to "+newFile.getAbsolutePath());
//create directories for sub directories in zip
new File(newFile.getParent()).mkdirs();
FileOutputStream fos = new FileOutputStream(newFile);
int len;
while ((len = zis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
fos.close();
//close this ZipEntry
zis.closeEntry();
ze = zis.getNextEntry();
}
//close last ZipEntry
zis.closeEntry();
zis.close();
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Related
I am very new to java and coming from a js background. I am attempting to loop through a folder full of files and zipping it. Currently, I have done the zipping part successfully, but doing by statically adding the files. The answer is obviously a loop from a programming perspective. I am having trouble looping a list and making it equal to the zipping method below. Online Resources are not making sense much sense to me due to my beginner skill.
package zipFile;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class ZipFiles {
public static void main(String[] args) {
try {
FileOutputStream fos = new FileOutputStream("atest.zip");
ZipOutputStream zos = new ZipOutputStream(fos);
String file1Name = "src/resources/text1";
String file2Name = "src/resources/text2";
String file3Name = "src/resources/text3";
String file4Name = "src/resources/text4";
String file5Name = "src/resources/text5";
String file6Name = "src/resources/text6";
addToZipFile(file1Name, zos);
addToZipFile(file2Name, zos);
addToZipFile(file3Name, zos);
addToZipFile(file4Name, zos);
addToZipFile(file5Name, zos);
addToZipFile(file6Name, zos);
zos.close();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void addToZipFile(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();
}
}
The answer is in this article: http://www.baeldung.com/java-compress-and-uncompress
This code zips multiple files (Very similar to your code but slightly changed):
public class ZipMultipleFiles {
public static void main(String[] args) throws IOException {
List<String> srcFiles = Arrays.asList("test1.txt", "test2.txt");
FileOutputStream fos = new FileOutputStream("multiCompressed.zip");
ZipOutputStream zipOut = new ZipOutputStream(fos);
for (String srcFile : srcFiles) {
File fileToZip = new File(srcFile);
FileInputStream fis = new FileInputStream(fileToZip);
ZipEntry zipEntry = new ZipEntry(fileToZip.getName());
zipOut.putNextEntry(zipEntry);
byte[] bytes = new byte[1024];
int length;
while((length = fis.read(bytes)) >= 0) {
zipOut.write(bytes, 0, length);
}
fis.close();
}
zipOut.close();
fos.close();
}
}
EDIT:
This line in the code creates an array that is easy to go through in a while loop:
List<String> srcFiles = Arrays.asList("test1.txt", "test2.txt");
basically used finding children of a folder method thanks to Elliotk link. I am making the string equal to the path of the parent folder - >checking if whether if its a directory - > list its files -> get the names and while loop to write all of them to a zipped folder
here is my whole code
package zipfolder2;
import java.io.*;
import java.util.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class zipfolders2 {
public static void main(String[] args) {
try {
String sourceFile = "src/resources";
FileOutputStream fos = new FileOutputStream("zippedfiles.zip");
ZipOutputStream zipOut = new ZipOutputStream(fos);
File fileToZip = new File(sourceFile);
zipFile(fileToZip, fileToZip.getName(), zipOut);
zipOut.close();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private static void zipFile(File fileToZip, String fileName, ZipOutputStream zipOut) throws IOException {
if (fileToZip.isHidden()) {
return;
}
if (fileToZip.isDirectory()) {
File[] children = fileToZip.listFiles();
for (File childFile : children) {
zipFile(childFile, fileName + "/" + childFile.getName(), zipOut);
}
return;
}
FileInputStream fis = new FileInputStream(fileToZip);
ZipEntry zipEntry = new ZipEntry(fileName);
zipOut.putNextEntry(zipEntry);
byte[] bytes = new byte[1024];
int length;
while ((length = fis.read(bytes)) >= 0) {
zipOut.write(bytes, 0, length);
}
fis.close();
}
}
How to create zip inside zip file
enter image description here
got bellow Error:
D:\sagar\my work\Package Maker\DirectoryStruct>java zipStructure
java.io.FileNotFoundException: Additional_Sub_Folder\Additional_file.zip (The sy
stem cannot find the path specified)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
at java.io.FileOutputStream.<init>(FileOutputStream.java:110)
at zipStructure.main(zipStructure.java:22)
D:\sagar\my work\Package Maker\DirectoryStruct> that is Additional_sub_folder and Digital_sub_folder. inside Additional_sub_folder 1 zip file created(Additional_file.zip),inside that zip 2 folder are created like xml folder and pdf folder
and inside Digital_sub_folder create Artical_sub_folder,and inside Artical_sub_folder 3 new folder are created that is xml folder,pdf folder and Graphics folder. i try it be below java code but not works properly,please help to create the this structure.
import java.io.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class zipStructure {
public static void main(String[] args) {
try {
FileOutputStream fos = new FileOutputStream("main.zip");
ZipOutputStream zos = new ZipOutputStream(fos);
zos.putNextEntry(new ZipEntry("Additional_Sub_Folder/"));
zos.putNextEntry(new ZipEntry("Digital_Sub_Folder/"));
FileOutputStream fos1 = new FileOutputStream("Additional_Sub_Folder/Additional_file.zip");
ZipOutputStream zos1 = new ZipOutputStream(fos1);
/*zos1.putNextEntry(new ZipEntry("Additional_file.zip/xml/"));
zos1.putNextEntry(new ZipEntry("Additional_file.zip/pdf/"));*/
zos1.putNextEntry(new ZipEntry("Additional_file1.zip/xml/"));
zos1.putNextEntry(new ZipEntry("Additional_file1.zip/pdf/"));
zos1.close();
fos1.close();
zos.close();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void addToZipFile(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();
}
}
[1]: http://i.stack.imgur.com/TNA8b.jpg
I did not have the problem with the zip-I/O, I had the FileNotFoundException with every type of I/O that uses the fileSystem.
What helped for me was, if you're working with eclipse, that there is function like "refresh project" or something like this. Everytime I had problems with I/O, that worked.
I am unziping a file using java.
Long ago, somewhere I've got this class in the internet, and I stole and kept it for my own usage. The complete class is:
package pubapp.data;
import java.io.BufferedOutputStream;
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;
public class UnzipUtility {
private static final int BUFFER_SIZE = 4096;
public void unzip(String zipFilePath, String destDirectory) throws IOException {
File destDir = new File(destDirectory);
if (!destDir.exists()) {
destDir.mkdir();
}
ZipInputStream zipIn = new ZipInputStream(new FileInputStream(zipFilePath));
ZipEntry entry = zipIn.getNextEntry();
// iterates over entries in the zip file
while (entry != null) {
String filePath = destDirectory + File.separator + entry.getName();
if (!entry.isDirectory()) {
// if the entry is a file, extracts it
extractFile(zipIn, filePath);
} else {
// if the entry is a directory, make the directory
File dir = new File(filePath);
dir.mkdir();
}
zipIn.closeEntry();
entry = zipIn.getNextEntry();
}
zipIn.close();
}
private void extractFile(ZipInputStream zipIn, String filePath) throws IOException {
try (BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath))) {
byte[] bytesIn = new byte[BUFFER_SIZE];
int read = 0;
while ((read = zipIn.read(bytesIn)) != -1) {
bos.write(bytesIn, 0, read);
}
}
}
}
This works in my local computer (windows 7, jdk_1.7, tomcat) fine. But when I upload war to remote hosting, it does no work as expected. It does not create the sub directories. Web hosting is using Debian/Ubuntu, jdk_1.7, tomcat-7.x
What is wrong with this code in linux?
I made a small program to download a zip file from a direct link and after that extract all contents of it in the same directory.
It doesn't download anything and it also doesn't extract.
This is what I have so far:
package main;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class Main {
static String url = "https://www.dropbox.com/s/uml938guklfvo7r/Tekst.zip?dl=1";
static int lastSlashIndex = url.lastIndexOf('/');
static String filename= url.substring(lastSlashIndex + 1, url.length() - 5);
static String filepath = "C:";
private static final int BUFFER = 4096;
public static void main(String[] args) {
try{
URL website = new URL(url);
ReadableByteChannel rbc;
rbc = Channels.newChannel(website.openStream());
new File(filepath + filename).createNewFile();
FileOutputStream fos = new FileOutputStream(filepath + filename);
fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
fos.close();
}catch(Exception e){ e.printStackTrace(); }
try {
unzip(filepath + filename, filepath);
} catch (IOException e) {
e.printStackTrace();
}
}
public static void unzip(String zipFilePath, String destDirectory) throws IOException {
File destDir = new File(destDirectory);
if (!destDir.exists()) {
destDir.mkdir();
}
ZipInputStream zipIn = new ZipInputStream(new FileInputStream(zipFilePath));
ZipEntry entry = zipIn.getNextEntry();
// iterates over entries in the zip file
while (entry != null) {
String filePath = destDirectory + File.separator + entry.getName();
if (!entry.isDirectory()) {
// if the entry is a file, extracts it
extractFile(zipIn, filePath);
} else {
// if the entry is a directory, make the directory
File dir = new File(filePath);
dir.mkdir();
}
zipIn.closeEntry();
entry = zipIn.getNextEntry();
}
zipIn.close();
}
private static void extractFile(ZipInputStream zipIn, String filePath) throws IOException {
Line 68>> BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath));
byte[] bytesIn = new byte[BUFFER];
int read = 0;
while ((read = zipIn.read(bytesIn)) != -1) {
bos.write(bytesIn, 0, read);
}
bos.close();
}
}
Here is the error:
java.io.FileNotFoundException: C:\Tekst.txt (Access is denied)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at main.Main.extractFile(Main.java:68)
at main.Main.unzip(Main.java:55)
at main.Main.main(Main.java:35)
Apparently this file is simply not created yet. You can create it with
new File(yourFilepath).createNewFile()
and you need to do it before you invoke
FileOutputStream fos = new FileOutputStream(filepath + filename);
which throws the exception. Then it works perfectly fine.
I want to unzip a zipped folder which is having subfolder structure into a single file and not in the same subfolder form. I have below code which creates the subfolder structure of zip and copies the file. But I need to copy all the files in a single folder. Is it possible.
Below is the code:-
public class UnZip
{
List fileList;
private static final String INPUT_ZIP_FILE = "C:\MyFile.zip";
private static final String OUTPUT_FOLDER = "C:\outputzip";
public static void main( String[] args )
{
UnZip unZip = new UnZip();
unZip.unZipIt(INPUT_ZIP_FILE,OUTPUT_FOLDER);
}
/**
* Unzip it
* #param zipFile input zip file
* #param output zip file output folder
*/
public void unZipIt(String zipFile, String outputFolder){
byte[] buffer = new byte[1024];
try{
//create output directory is not exists
File folder = new File(OUTPUT_FOLDER);
if(!folder.exists()){
folder.mkdir();
}
//get the zip file content
ZipInputStream zis =
new ZipInputStream(new FileInputStream(zipFile));
//get the zipped file list entry
ZipEntry ze = zis.getNextEntry();
while(ze!=null){
String fileName = ze.getName();
File newFile = new File(outputFolder + File.separator + fileName);
System.out.println("file unzip : "+ newFile.getAbsoluteFile());
//create all non exists folders
//else you will hit FileNotFoundException for compressed folder
new File(newFile.getParent()).mkdirs();
FileOutputStream fos = new FileOutputStream(newFile);
int len;
while ((len = zis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
fos.close();
ze = zis.getNextEntry();
}
zis.closeEntry();
zis.close();
System.out.println("Done");
}catch(IOException ex){
ex.printStackTrace();
}
}
}
Thanks in advance !!
Take this
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;
public class Unzip {
public static final String OUTPUT_FOLDER = "/tmp/zipoutput";
public static final String INPUT_ZIP_FILE = "/tmp/ziptest.zip";
public static void main(String[] args) {
UnZip unZip = new UnZip();
unZip.unZipIt(INPUT_ZIP_FILE, OUTPUT_FOLDER);
}
public static class UnZip {
/**
* Unzip it
*
* #param zipFile input zip file
* #param output zip file output folder
*/
public void unZipIt(String zipFile, String outputFolder) {
byte[] buffer = new byte[1024];
try {
//create output directory is not exists
File folder = new File(outputFolder);
if (!folder.exists()) {
folder.mkdir();
}
//get the zip file content
ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFile));
//get the zipped file list entry
ZipEntry ze = zis.getNextEntry();
while (ze != null) {
String fileName = ze.getName();
if (ze.isDirectory()) {
ze = zis.getNextEntry();
continue;
}
System.out.println("origin file: " + fileName);
fileName = new File(fileName).getName();
File newFile = new File(outputFolder + File.separator + fileName);
System.out.println("file unzip : " + newFile.getAbsoluteFile());
//create all non exists folders
//else you will hit FileNotFoundException for compressed folder
new File(newFile.getParent()).mkdirs();
FileOutputStream fos = new FileOutputStream(newFile);
int len;
while ((len = zis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
fos.close();
ze = zis.getNextEntry();
}
zis.closeEntry();
zis.close();
System.out.println("Done");
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
}