Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//it under the terms of the GNU Affero General Public License as published by

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileOutputStream;
import java.io.IOException;

import java.util.Enumeration;

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

public class Main {
    /**
     * extracts a zip file to the given dir
     * @param archive
     * @param destDir
     * @throws IOException 
     * @throws ZipException 
     * @throws Exception
     */
    public static void extractZipArchive(File archive, File destDir) throws ZipException, IOException {
        if (!destDir.exists()) {
            destDir.mkdir();
        }

        ZipFile zipFile = new ZipFile(archive);
        Enumeration<? extends ZipEntry> entries = zipFile.entries();

        byte[] buffer = new byte[16384];
        int len;
        while (entries.hasMoreElements()) {
            ZipEntry entry = entries.nextElement();

            String entryFileName = entry.getName();

            File dir = buildDirectoryHierarchyFor(entryFileName, destDir);
            if (!dir.exists()) {
                dir.mkdirs();
            }

            if (!entry.isDirectory()) {
                BufferedOutputStream bos = new BufferedOutputStream(
                        new FileOutputStream(new File(destDir, entryFileName)));

                BufferedInputStream bis = new BufferedInputStream(zipFile.getInputStream(entry));

                while ((len = bis.read(buffer)) > 0) {
                    bos.write(buffer, 0, len);
                }

                bos.flush();
                bos.close();
                bis.close();
            }
        }
    }

    private static File buildDirectoryHierarchyFor(String entryName, File destDir) {
        int lastIndex = entryName.lastIndexOf('/');
        entryName.substring(lastIndex + 1);
        String internalPathToEntry = entryName.substring(0, lastIndex + 1);
        return new File(destDir, internalPathToEntry);
    }
}