utils.ZipUtils.java Source code

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Here is the source code for utils.ZipUtils.java

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/*
 * Copyright (c) 2013 GigaSpaces Technologies Ltd. All rights reserved
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package utils;

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;

import org.apache.commons.io.IOUtils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * An utility class that helps to unzip any zip file to desired output directory.
 * 
 * @author Igor Goldenberg
 */
public class ZipUtils {
    private static Logger logger = LoggerFactory.getLogger(ZipUtils.class);

    static public void unzipArchive(File archive, File outputDir) throws ZipException {
        try {
            ZipFile zipfile = new ZipFile(archive);
            for (Enumeration<? extends ZipEntry> e = zipfile.entries(); e.hasMoreElements();) {
                ZipEntry entry = e.nextElement();
                unzipEntry(zipfile, entry, outputDir);
            }
        } catch (Exception e) {
            String msg = "Failed to extract archive: " + archive;
            logger.error(msg, e);
            throw new ZipException(msg);
        }
    }

    static private void unzipEntry(ZipFile zipfile, ZipEntry entry, File outputDir) throws IOException {

        if (entry.isDirectory()) {
            new File(outputDir, entry.getName()).mkdir();
            return;
        }

        File outputFile = new File(outputDir, entry.getName());
        if (!outputFile.getParentFile().exists())
            outputFile.getParentFile().mkdir();

        logger.debug("Extracting: [{}]", entry);
        BufferedInputStream inputStream = new BufferedInputStream(zipfile.getInputStream(entry));
        BufferedOutputStream outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));

        try {
            IOUtils.copy(inputStream, outputStream);
        } finally {
            outputStream.close();
            inputStream.close();
        }
    }
}