Java Zip File Check isZip(File file)

Description

is Zip

License

Open Source License

Declaration

public static boolean isZip(File file) 

Method Source Code

//package com.java2s;
/******************************************************************************* 
 * Copyright (c) 2010 - 2011 Red Hat, Inc. 
 * Distributed under license by Red Hat, Inc. All rights reserved. 
 * This program is made available under the terms of the 
 * Eclipse Public License v1.0 which accompanies this distribution, 
 * and is available at http://www.eclipse.org/legal/epl-v10.html 
 * /*from  w  ww  .j a v  a  2s  .c  om*/
 * Contributors: 
 * Red Hat, Inc. - initial API and implementation 
 ******************************************************************************/

import java.io.BufferedInputStream;

import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;

import java.io.IOException;

public class Main {
    public static boolean isZip(File file) {
        if (file.isDirectory()) {
            return false;
        }
        if (!file.canRead()) {
            return false;
        }
        if (file.length() < 4) {
            return false;
        }
        try {
            DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));
            int test = in.readInt();
            in.close();
            return test == 0x504b0304;
        } catch (IOException ioe) {
            return false;
        }
    }
}

Related

1. isZip(BufferedInputStream in)
2. isZip(byte[] bytes)
3. isZip(File candidate)
4. isZip(File f)
5. isZip(File file)
6. isZip(File file)
7. isZip(File file)
8. isZip(File zip)