import java.io.FileOutputStream;

import java.io.IOException;

import java.nio.file.*;

import java.nio.file.attribute.BasicFileAttributes;

import java.util.zip.ZipEntry;

import java.util.zip.ZipOutputStream;

​

public class ZipCompress {

    public static void compress(String dirPath) {

        final Path sourceDir = Paths.get(dirPath);

        String zipFileName = dirPath.concat(".zip");

        try {

            final ZipOutputStream outputStream = new ZipOutputStream(new FileOutputStream(zipFileName));

            Files.walkFileTree(sourceDir, new SimpleFileVisitor<Path>() {

                @Override

                public FileVisitResult visitFile(Path file, BasicFileAttributes attributes) {

                    try {

                        Path targetFile = sourceDir.relativize(file);

                        outputStream.putNextEntry(new ZipEntry(targetFile.toString()));

                        byte[] bytes = Files.readAllBytes(file);

                        outputStream.write(bytes, 0, bytes.length);

                        outputStream.closeEntry();

                    } catch (IOException e) {

                        e.printStackTrace();

                    }

                    return FileVisitResult.CONTINUE;

                }

            });

            outputStream.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

StringBuilder sb = new StringBuilder();

sb.append("Test String");

​

File f = new File("d:\\test.zip");

ZipOutputStream out = new ZipOutputStream(new FileOutputStream(f));

ZipEntry e = new ZipEntry("mytext.txt");

out.putNextEntry(e);

​

byte[] data = sb.toString().getBytes();

out.write(data, 0, data.length);

out.closeEntry();

​

out.close();

StringBuilder sb = new StringBuilder();

sb.append("Test String");

​

File f = new File("d:\\test.zip");

ZipOutputStream out = new ZipOutputStream(new FileOutputStream(f));

ZipEntry e = new ZipEntry("mytext.txt");

out.putNextEntry(e);

​

byte[] data = sb.toString().getBytes();

out.write(data, 0, data.length);

out.closeEntry();

​

out.close();

​

​

import java.io.BufferedInputStream;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.Date;

import java.util.Enumeration;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipInputStream;

​

/**

 * Java program to iterate and read file entries from Zip archive.

 * This program demonstrate two ways to retrieve files from Zip

 *  using ZipFile and by using ZipInputStream class.

 * @author Javin

 */

​

public class ZipFileReader {

​

    // This Zip file contains 11 PNG images

    private static final String FILE_NAME = "C:\\temp\\pics.zip";

    private static final String OUTPUT_DIR = "C:\\temp\\Images\\";

    private static final int BUFFER_SIZE = 8192;

​

    public static void main(String args[]) throws IOException {

​

        // Prefer ZipFile over ZipInputStream

        readUsingZipFile();

    //  readUsingZipInputStream();

​

    }

​

    /*

     * Example of reading Zip archive using ZipFile class

     */

​

    private static void readUsingZipFile() throws IOException {

        final ZipFile file = new ZipFile(FILE_NAME);

        System.out.println("Iterating over zip file : " + FILE_NAME);

​

        try {

            final Enumeration<? extends ZipEntry> entries = file.entries();

            while (entries.hasMoreElements()) {

                final ZipEntry entry = entries.nextElement();

                System.out.printf("File: %s Size %d  Modified on %TD %n",

   entry.getName(), entry.getSize(), new Date(entry.getTime()));

                extractEntry(entry, file.getInputStream(entry));

            }

            System.out.printf("Zip file %s extracted successfully in %s",

  FILE_NAME, OUTPUT_DIR);

        } finally {

            file.close();

        }

​

    }

​

    /*

     * Example of reading Zip file using ZipInputStream in Java.

     */

​

    private static void readUsingZipInputStream() throws IOException {

        BufferedInputStream bis 

    = new BufferedInputStream(new FileInputStream(FILE_NAME));

        final ZipInputStream is = new ZipInputStream(bis);

​

        try {

            ZipEntry entry;

            while ((entry = is.getNextEntry()) != null) {

                System.out.printf("File: %s Size %d  Modified on %TD %n",

         entry.getName(), entry.getSize(), new Date(entry.getTime()));

                extractEntry(entry, is);

            }

        } finally {

            is.close();

        }

​

    }

​

    /*

     * Utility method to read  data from InputStream

     */

​

    private static void extractEntry(final ZipEntry entry, InputStream is)

               throws IOException {

        String exractedFile = OUTPUT_DIR + entry.getName();

        FileOutputStream fos = null;

​

        try {

            fos = new FileOutputStream(exractedFile);

            final byte[] buf = new byte[BUFFER_SIZE];

            int read = 0;

            int length;

​

            while ((length = is.read(buf, 0, buf.length)) >= 0) {

                fos.write(buf, 0, length);

            }

​

        } catch (IOException ioex) {

            fos.close();

        }

​

    }

​

}

​

Output:

Iterating over zip file : C:\temp\pics.zip

File: Image  (11).png Size 21294  Modified on 10/24/13

File: Image  (1).png Size 22296  Modified on 11/19/13

File: Image  (2).png Size 10458  Modified on 10/24/13

File: Image  (3).png Size 18425  Modified on 11/19/13

File: Image  (4).png Size 31888  Modified on 11/19/13

File: Image  (5).png Size 27454  Modified on 11/19/13

File: Image  (6).png Size 67608  Modified on 11/19/13

File: Image  (7).png Size 8659  Modified on 11/19/13

File: Image  (8).png Size 40015  Modified on 11/19/13

File: Image  (9).png Size 17062  Modified on 10/24/13

File: Image  (10).png Size 42467  Modified on 10/24/13

Zip file C:\temp\pics.zip extracted successfully in C:\temp\Images\

// Import required packages

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.zip.ZipEntry;

import java.util.zip.ZipOutputStream;

​

// Create a ZIP file

try(FileOutputStream fos = new FileOutputStream("file.zip");

    ZipOutputStream zos = new ZipOutputStream(fos)) {

    ZipEntry ze = new ZipEntry("file.txt");

    zos.putNextEntry(ze);

    // Add file content to ZipEntry here

    zos.closeEntry();

} catch (IOException e) {

    e.printStackTrace();

}