Java Unzip InputStream unzip(InputStream zin, File file)

Description

unzip

License

Apache License

Declaration

private static void unzip(InputStream zin, File file) throws IOException 

Method Source Code

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

import java.io.*;

public class Main {
    private static final int BUFFER_SIZE = 8192;

    private static void unzip(InputStream zin, File file) throws IOException {
        FileOutputStream out = null;
        try {//from w w w .  j  a  v a2 s . c  o m
            out = new FileOutputStream(file);
            joinStreams(zin, out);
            out.close();
        } finally {
            failsafeClose(out);
        }
    }

    /**
     * Reads all bytes from the input stream and writes them to the output
     * stream.  Bytes are read and written in chunks.  The caller retains
     * ownership of the streams - i.e. they are not closed by this method.
     *
     * @param input  stream to read from
     * @param output stream to write to
     * @throws IOException on any error
     */
    public static void joinStreams(InputStream input, OutputStream output) throws IOException {
        byte[] buffer = new byte[BUFFER_SIZE];
        int n;

        while ((n = input.read(buffer)) > 0) {
            output.write(buffer, 0, n);
        }
    }

    /**
     * Closes a given closeable if it is not null, and ignores thrown errors.  Useful for finally
     * clauses which perform last-ditch cleanup and don't want to throw (masking earlier errors).
     *
     * @param closeable to be closed
     */
    public static void failsafeClose(Closeable closeable) {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (IOException e) {
                // Ignored.
            }
        }
    }
}

Related

1. unzip(InputStream inputStream, String destDirectory)
2. unzip(InputStream inputStream, String outputFolder)
3. unzip(InputStream is, File destDir)
4. unzip(InputStream libInputStream, String path)
5. unzip(InputStream source, File target)