Example usage for java.util.zip ZipInputStream ZipInputStream

Introduction

In this page you can find the example usage for java.util.zip ZipInputStream ZipInputStream.

Prototype

public ZipInputStream(InputStream in)

Source Link

Document

Creates a new ZIP input stream.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    String destinationname = "d:\\";
    byte[] buf = new byte[1024];
    ZipInputStream zipinputstream = null;
    ZipEntry zipentry;/*from   w  ww  . ja  va2  s  . c  om*/
    zipinputstream = new ZipInputStream(new FileInputStream("fileName"));
    zipentry = zipinputstream.getNextEntry();
    while (zipentry != null) {
        String entryName = zipentry.getName();
        FileOutputStream fileoutputstream;
        File newFile = new File(entryName);
        String directory = newFile.getParent();

        if (directory == null) {
            if (newFile.isDirectory())
                break;
        }
        fileoutputstream = new FileOutputStream(destinationname + entryName);
        int n;
        while ((n = zipinputstream.read(buf, 0, 1024)) > -1) {
            fileoutputstream.write(buf, 0, n);
        }
        fileoutputstream.close();
        zipinputstream.closeEntry();
        zipentry = zipinputstream.getNextEntry();
    }
    zipinputstream.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String zipname = "d.zip";
    CheckedInputStream checksum = new CheckedInputStream(new FileInputStream(zipname), new Adler32());
    ZipInputStream zis = new ZipInputStream(new BufferedInputStream(checksum));
    ZipEntry entry;/*from ww  w.j  av  a 2  s.c  om*/

    while ((entry = zis.getNextEntry()) != null) {
        System.out.println("Unzipping: " + entry.getName());
        int size;
        byte[] buffer = new byte[2048];

        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(entry.getName()),
                buffer.length);
        while ((size = zis.read(buffer, 0, buffer.length)) != -1) {
            bos.write(buffer, 0, size);
        }
        bos.flush();
        bos.close();
    }

    zis.close();
    System.out.println("Checksum = " + checksum.getChecksum().getValue());
}

From source file:Main.java

public static void main(String[] args) throws IOException {
    FileOutputStream f = new FileOutputStream("test.zip");
    CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());
    ZipOutputStream zos = new ZipOutputStream(csum);
    BufferedOutputStream out = new BufferedOutputStream(zos);
    zos.setComment("A test of Java Zipping");

    for (int i = 0; i < args.length; i++) {
        System.out.println("Writing file " + args[i]);
        BufferedReader in = new BufferedReader(new FileReader(args[i]));
        zos.putNextEntry(new ZipEntry(args[i]));
        int c;/* w ww . j  a  va  2s  .  c  o m*/
        while ((c = in.read()) != -1)
            out.write(c);
        in.close();
    }
    out.close();

    System.out.println("Checksum: " + csum.getChecksum().getValue());

    System.out.println("Reading file");
    FileInputStream fi = new FileInputStream("test.zip");
    CheckedInputStream csumi = new CheckedInputStream(fi, new Adler32());
    ZipInputStream in2 = new ZipInputStream(csumi);
    BufferedInputStream bis = new BufferedInputStream(in2);
    ZipEntry ze;
    while ((ze = in2.getNextEntry()) != null) {
        System.out.println("Reading file " + ze);
        int x;
        while ((x = bis.read()) != -1)
            System.out.write(x);
    }
    System.out.println("Checksum: " + csumi.getChecksum().getValue());
    bis.close();

}

From source file:ZipCompress.java

public static void main(String[] args) throws IOException {
    FileOutputStream f = new FileOutputStream("test.zip");
    CheckedOutputStream csum = new CheckedOutputStream(f, new Adler32());
    ZipOutputStream zos = new ZipOutputStream(csum);
    BufferedOutputStream out = new BufferedOutputStream(zos);
    zos.setComment("A test of Java Zipping");
    // No corresponding getComment(), though.
    for (int i = 0; i < args.length; i++) {
        System.out.println("Writing file " + args[i]);
        BufferedReader in = new BufferedReader(new FileReader(args[i]));
        zos.putNextEntry(new ZipEntry(args[i]));
        int c;//from  w  w  w.j  ava  2  s.  com
        while ((c = in.read()) != -1)
            out.write(c);
        in.close();
    }
    out.close();
    // Checksum valid only after the file has been closed!
    System.out.println("Checksum: " + csum.getChecksum().getValue());
    // Now extract the files:
    System.out.println("Reading file");
    FileInputStream fi = new FileInputStream("test.zip");
    CheckedInputStream csumi = new CheckedInputStream(fi, new Adler32());
    ZipInputStream in2 = new ZipInputStream(csumi);
    BufferedInputStream bis = new BufferedInputStream(in2);
    ZipEntry ze;
    while ((ze = in2.getNextEntry()) != null) {
        System.out.println("Reading file " + ze);
        int x;
        while ((x = bis.read()) != -1)
            System.out.write(x);
    }
    System.out.println("Checksum: " + csumi.getChecksum().getValue());
    bis.close();
    // Alternative way to open and read zip files:
    ZipFile zf = new ZipFile("test.zip");
    Enumeration e = zf.entries();
    while (e.hasMoreElements()) {
        ZipEntry ze2 = (ZipEntry) e.nextElement();
        System.out.println("File: " + ze2);
        // ... and extract the data as before
    }
}

From source file:Main.java

public static ZipInputStream getFileFromZip(InputStream zipFileStream) throws IOException {
    ZipInputStream zis = new ZipInputStream(zipFileStream);
    ZipEntry ze;/*from   w  w  w.j av a2 s.com*/
    while ((ze = zis.getNextEntry()) != null) {
        Log.w("AssetUtil", "extracting file: '" + ze.getName() + "'...");
        return zis;
    }
    return null;
}

From source file:Main.java

public static byte[] unZip(byte[] data) {
    byte[] b = null;
    try {//  ww  w . j  av  a2s . c om
        ByteArrayInputStream bis = new ByteArrayInputStream(data);
        ZipInputStream zip = new ZipInputStream(bis);
        while (zip.getNextEntry() != null) {
            byte[] buf = new byte[1024];
            int num = -1;
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            while ((num = zip.read(buf, 0, buf.length)) != -1) {
                baos.write(buf, 0, num);
            }
            b = baos.toByteArray();
            baos.flush();
            baos.close();
        }
        zip.close();
        bis.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return b;
}

From source file:Main.java

public static byte[] unZip(byte[] bContent) {
    byte[] b = null;
    try {//w ww  .  j  ava 2s .co  m
        ByteArrayInputStream bis = new ByteArrayInputStream(bContent);
        ZipInputStream zip = new ZipInputStream(bis);
        while (zip.getNextEntry() != null) {
            byte[] buf = new byte[1024];
            int num = -1;
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            while ((num = zip.read(buf, 0, buf.length)) != -1) {
                baos.write(buf, 0, num);
            }
            b = baos.toByteArray();
            baos.flush();
            baos.close();
        }
        zip.close();
        bis.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return b;
}

From source file:Main.java

public static void unzip(String zipFilePath, String fileName) {

    try {/*  w  w w .  j  a  va 2 s  .  c o  m*/
        FileInputStream fin = new FileInputStream(zipFilePath);
        ZipInputStream zin = new ZipInputStream(fin);

        do {
            // no-op
        } while (!zin.getNextEntry().getName().equals(fileName));

        OutputStream os = new FileOutputStream(fileName);

        byte[] buffer = new byte[1024];
        int length;

        //read the entry from zip file and extract it to disk
        while ((length = zin.read(buffer)) > 0) {
            os.write(buffer, 0, length);
        }
        os.close();
        zin.close();
    } catch (IOException e) {
        throw new RuntimeException(e);
    }

}

From source file:Main.java

public static byte[] unZip(byte[] bContent) throws IOException {
    byte[] b = null;
    try {// w w  w .  j a  va2s.  c  o m
        ByteArrayInputStream bis = new ByteArrayInputStream(bContent);
        ZipInputStream zip = new ZipInputStream(bis);

        while (zip.getNextEntry() != null) {
            byte[] buf = new byte[1024];
            int num = -1;
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            while ((num = zip.read(buf, 0, buf.length)) != -1) {
                baos.write(buf, 0, num);
            }
            b = baos.toByteArray();
            baos.flush();
            baos.close();
        }
        zip.close();
        bis.close();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return b;
}

From source file:Main.java

public static void unpack(InputStream in, File targetDir) throws IOException {
    ZipInputStream zin = new ZipInputStream(in);
    ZipEntry entry;/* w w  w .j a  v  a 2  s .  c  o m*/
    while ((entry = zin.getNextEntry()) != null) {
        String extractFilePath = entry.getName();
        if ((extractFilePath.startsWith("/")) || (extractFilePath.startsWith("\\"))) {
            extractFilePath = extractFilePath.substring(1);
        }
        File extractFile = new File(new StringBuilder().append(targetDir.getPath()).append(File.separator)
                .append(extractFilePath).toString());
        if (entry.isDirectory()) {
            if (!extractFile.exists())
                extractFile.mkdirs();
        } else {
            File parent = extractFile.getParentFile();
            if (!parent.exists()) {
                parent.mkdirs();
            }

            FileOutputStream os = new FileOutputStream(extractFile);
            copyFile(zin, os);
            os.flush();
            os.close();
        }
    }
}