Java FileInputStream Copy copyFile(File from, File to)

Description

copy File

License

Open Source License

Declaration

public static void copyFile(File from, File to) throws IOException 

Method Source Code

//package com.java2s;
/**/*from  ww  w.  java  2 s.c  o m*/
 * Copyright (C) 2009-2012 BonitaSoft S.A.
 * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2.0 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

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

import java.io.FileOutputStream;

import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;

import java.io.OutputStream;

public class Main {
    public static int bufferSize = 2 * 8192;

    public static void copyFile(File from, File to) throws IOException {

        if (from.isDirectory()) {
            copyDir(from, to);
        } else {
            FileInputStream fromIn = new FileInputStream(from);
            FileOutputStream toOut = new FileOutputStream(to);
            try {
                copy(fromIn, toOut);
            } finally {
                fromIn.close();
                toOut.close();
            }
        }

    }

    public static void copyDir(File from, File to) throws IOException {
        if (to.exists()) {
            if (!to.isDirectory()) {
                throw new IllegalArgumentException(to.toString());
            }
        } else {
            to.mkdirs();
        }

        File[] files = from.listFiles(new FilenameFilter() {

            @Override
            public boolean accept(File arg0, String arg1) {
                return !".svn".equals(arg1);
            }
        });

        if (files != null) {
            for (int i = 0; i < files.length; i++) {
                String name = files[i].getName();
                if (".".equals(name) || "..".equals(name)) {
                    continue;
                }
                copy(files[i], new File(to, name));
            }
        }
    }

    public static void copy(File from, File to) throws IOException {
        if (from.isDirectory()) {
            copyDir(from, to);
        } else {
            FileInputStream fromIn = new FileInputStream(from);
            FileOutputStream toOut = new FileOutputStream(to);
            try {
                copy(fromIn, toOut);
            } finally {
                fromIn.close();
                toOut.close();
            }
        }

    }

    public static void copy(InputStream in, OutputStream out) throws IOException {
        copy(in, out, -1);
    }

    public static void copy(InputStream in, OutputStream out, long byteCount) throws IOException {
        byte buffer[] = new byte[bufferSize];
        int len = bufferSize;

        if (byteCount >= 0) {
            while (byteCount > 0) {
                int max = byteCount < bufferSize ? (int) byteCount : bufferSize;
                len = in.read(buffer, 0, max);

                if (len == -1) {
                    break;
                }

                byteCount -= len;
                out.write(buffer, 0, len);
            }
        } else {
            while (true) {
                len = in.read(buffer, 0, bufferSize);
                if (len < 0) {
                    break;
                }
                out.write(buffer, 0, len);
            }
        }
        out.close();
        in.close();
    }
}

Related

1. copyFile(File from, File to)
2. copyFile(File from, File to)
3. copyFile(File from, File to)
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6. copyFile(File from, File to)
7. copyFile(File from, File to)
8. copyFile(File from, File to)
9. copyFile(File from, File to, byte[] buf)