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Pramod Bablad
Pramod Bablad

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How To ZIP File/Directory In Java?

#java

How To Zip A Single File In Java?

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.ZipOutputStream;

public class ZipFileJavaProgram
{
private static void zipSingleFile(String filePath) throws IOException
{
//Step 1 : Create a File fileToBeZipped with given filePath
//and wrap it into FileInputStream fis

 File fileToBeZipped = new File(filePath); FileInputStream fis = new FileInputStream(fileToBeZipped); //Step 2 : Create FileOutputStream fos with path to output file //and wrap it into ZipOutputStream zos FileOutputStream fos = new FileOutputStream("I:\\ZippedFile.zip"); ZipOutputStream zos = new ZipOutputStream(fos); //Step 3 : Create zipEntry with the name of fileToBeZipped ZipEntry zipEntry = new ZipEntry(fileToBeZipped.getName()); //Step 4 : Read fis byte by byte into byte array bytes and //write them into zos till the end of fis zos.putNextEntry(zipEntry); byte[] bytes = new byte[1024]; while (fis.read(bytes) >= 0) { zos.write(bytes, 0, bytes.length); } zos.closeEntry(); //Step 5 : Close the resources fis.close(); zos.close(); fos.close(); } public static void main(String[] args) throws IOException { String filePath = "I:\\TextFileOne.txt"; zipSingleFile(filePath); }
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}

How To Zip Multiple Files In Java?

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipFileJavaProgram
{
private static void zipMultipleFiles(String... filePaths) throws IOException
{
//Step 1 : Creating FileOutputStream fos and ZipOutputStream zos

 FileOutputStream fos = new FileOutputStream("I:\\ZippedFile.zip"); ZipOutputStream zos = new ZipOutputStream(fos); //Step 2 : Creating a List of filePaths List<String> filesToBeZipped = Arrays.asList(filePaths); FileInputStream fis; //Step 3 : Zipping each file in filesToBeZipped one by one for (String filePath : filesToBeZipped) { File fileToBeZipped = new File(filePath); fis = new FileInputStream(fileToBeZipped); ZipEntry zipEntry = new ZipEntry(fileToBeZipped.getName()); zos.putNextEntry(zipEntry); byte[] bytes = new byte[1024]; while (fis.read(bytes) >= 0) { zos.write(bytes, 0, bytes.length); } zos.closeEntry(); fis.close(); } //Step 4 : Close the resources zos.close(); fos.close(); } public static void main(String[] args) throws IOException { String[] filePaths = new String[] {"I:\\TextFileOne.txt", "I:\\TextFileTwo.txt", "I:\\TextFileThree.txt"} ; zipMultipleFiles(filePaths); }
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}

How To Zip A Whole Directory In Java?

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.ZipOutputStream;

public class ZipFileJavaProgram
{
//Method to ZIP single file

private static void zipSingleFile(String filePath, ZipOutputStream zos) throws IOException { File fileToBeZipped = new File(filePath); FileInputStream fis = new FileInputStream(fileToBeZipped); ZipEntry zipEntry = new ZipEntry(filePath); zos.putNextEntry(zipEntry); byte[] bytes = new byte[1024]; while (fis.read(bytes) >= 0) { zos.write(bytes, 0, bytes.length); } zos.closeEntry(); fis.close(); } //Method To ZIP Whole directory private static void zipWholeDirectory(String filePath, ZipOutputStream zos) throws IOException { File fileToBeZipped = new File(filePath); if(fileToBeZipped.isDirectory()) { File[] files = fileToBeZipped.listFiles(); for (File file : files) { zipWholeDirectory(filePath+"\\"+file.getName(), zos); } } else { zipSingleFile(filePath, zos); } } public static void main(String[] args) throws IOException { //Step 1 : Let filePath be the path of the directory to be zipped String filePath = "I:\\Java\\jdk1.8.0_181\\src"; //Step 2 : Creating FileOutputStream and ZipOutputStream FileOutputStream fos = new FileOutputStream("I:\\ZippedFile.zip"); ZipOutputStream zos = new ZipOutputStream(fos); //Step 3 : Call to zipWholeDirectory() zipWholeDirectory(filePath, zos); //Step 4 : Close the resources zos.close(); fos.close(); }
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}

Source : https://javaconceptoftheday.com/how-to-zip-file-directory-in-java/

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