Java Ungzip File unGzip(final File inputFile, final File outputDir)

Description

Ungzip an input file into an output file.

License

Apache License

Parameter

Parameter	Description
inputFile	the input .gz file
outputDir	the output directory file.

Exception

Parameter	Description
IOException	an exception
FileNotFoundException	an exception

Return

The with the ungzipped content.

Declaration

private static File unGzip(final File inputFile, final File outputDir)
        throws FileNotFoundException, IOException 

Method Source Code

//package com.java2s;
/**/*ww  w.  j a  v  a  2s .  com*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import java.util.zip.GZIPInputStream;

public class Main {
    /**
     * Ungzip an input file into an output file.
     * <p>
     * The output file is created in the output folder, having the same name as
     * the input file, minus the '.gz' extension.
     * 
     * @param inputFile
     *          the input .gz file
     * @param outputDir
     *          the output directory file.
     * @throws IOException
     * @throws FileNotFoundException
     * 
     * @return The {@File} with the ungzipped content.
     */
    private static File unGzip(final File inputFile, final File outputDir)
            throws FileNotFoundException, IOException {

        System.out.println(String.format("Ungzipping %s to dir %s.", inputFile.getAbsolutePath(),
                outputDir.getAbsolutePath()));

        final File outputFile = new File(outputDir,
                inputFile.getName().substring(0, inputFile.getName().length() - 3));

        final GZIPInputStream in = new GZIPInputStream(new FileInputStream(inputFile));
        final FileOutputStream out = new FileOutputStream(outputFile);

        for (int c = in.read(); c != -1; c = in.read()) {
            out.write(c);
        }

        in.close();
        out.close();

        return outputFile;
    }
}

Related

1. ungzip(File gzip, File toDir)
2. unGzip(File inFile, File outFile)
3. unGzip(File sourceZipFile, String destFolder, String destFile)
4. unGzip(final File compressedInputFile, final File outputDir)
5. ungzip(InputStream ins)
6. ungzip(String gzipFile, String newFile)
7. ungzipFile(String inputFileName, String outputFileName)