Java Unzip File unzip(File zip, File toDir)

Description

unzip

License

Apache License

Declaration

public static List<File> unzip(File zip, File toDir) throws IOException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.File;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class Main {

    public static List<File> unzip(File zip, File toDir) throws IOException {
        ZipFile zf = null;/*from  w  w  w . j a v a2 s  .co  m*/
        List<File> files = null;
        try {
            zf = new ZipFile(zip);
            files = new ArrayList<File>();
            Enumeration<?> entries = zf.entries();
            while (entries.hasMoreElements()) {
                ZipEntry entry = (ZipEntry) entries.nextElement();
                if (entry.isDirectory()) {
                    new File(toDir, entry.getName()).mkdirs();
                    continue;
                }

                InputStream input = null;
                OutputStream output = null;
                try {
                    File f = new File(toDir, entry.getName());
                    input = zf.getInputStream(entry);
                    output = new FileOutputStream(f);
                    copy(input, output);
                    files.add(f);
                } finally {
                    closeQuietly(output);
                    closeQuietly(input);
                }
            }
        } finally {
            if (zf != null) {
                zf.close();
            }
        }
        return files;
    }

    private static int copy(InputStream input, OutputStream output) throws IOException {
        long count = copyStream(input, output);
        if (count > Integer.MAX_VALUE) {
            return -1;
        }
        return (int) count;
    }

    private static void closeQuietly(OutputStream output) {
        try {
            if (output != null) {
                output.close();
            }
        } catch (IOException ioe) {
            // ignore
        }
    }

    private static void closeQuietly(InputStream input) {
        try {
            if (input != null) {
                input.close();
            }
        } catch (IOException ioe) {
            // ignore
        }
    }

    private static long copyStream(InputStream input, OutputStream output) throws IOException {
        byte[] buffer = new byte[1024];
        long count = 0;
        int n = 0;
        while (-1 != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }
}

Related

1. unzip(File zip, File extractTo)
2. unzip(File zip, File extractTo)
3. unzip(File zip, File location)
4. unzip(File zip, File targetDir)
5. unzip(File zip, File toDir)
6. unzip(File zip, String folder, File into)
7. unZip(File zipf, String targetDir)
8. unzip(File zipFile, File dest)
9. unzip(File zipFile, File destDir)