Java Unzip File uncompress(String str)

Description

uncompress

License

Apache License

Declaration

public static String uncompress(String str) 

Method Source Code

//package com.java2s;
/*/*from   w  w  w  .  j  a v  a 2s. co  m*/
 * 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.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

import java.io.UnsupportedEncodingException;

import java.util.zip.GZIPInputStream;

public class Main {

    public static String uncompress(String str) {
        try {
            if (str == null || str.length() == 0) {
                return str;
            }
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            ByteArrayInputStream in = new ByteArrayInputStream(str.getBytes("ISO-8859-1"));
            GZIPInputStream gunzip = new GZIPInputStream(in);
            byte[] buffer = new byte[256];
            int n;
            while ((n = gunzip.read(buffer)) >= 0) {
                out.write(buffer, 0, n);
            }
            return out.toString("GBK");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str;

    }

    /**
     * Gets a String's length or <code>0</code> if the String is <code>null</code>.
     * 
     * @param str
     *            a String or <code>null</code>
     * @return String length or <code>0</code> if the String is <code>null</code>.
     * @since 2.4
     */
    public static int length(String str) {
        return str == null ? 0 : str.length();
    }
}

Related

1. uncompress(final String zipFileName, final String directory)
2. uncompress(String chemin, String tempPrefix)
3. uncompress(String compressedValue)
4. uncompress(String inputCompressedFile, File outputFile)
5. uncompress(String inputFile, String toDir)
6. uncompress(ZipInputStream zipIn)
7. uncompressDirectory(File zipSource, File target)
8. uncompressEveryFileFromDirectory(File srcPath, File dstPath)
9. unCompressGzipFile(String path)