Java FileInputStream Copy copyFile(File sourceFile, File targetFile)

Description

copy File

License

Open Source License

Declaration

public static void copyFile(File sourceFile, File targetFile) throws IOException 

Method Source Code

//package com.java2s;
/*//from www  .j  av a  2s . c  o  m
 * JBoss, Home of Professional Open Source.
 * Copyright 2015, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.ZipFile;

public class Main {
    private static final int DEFAULT_BUFFER_SIZE = 65536;

    public static void copyFile(File sourceFile, File targetFile) throws IOException {
        if (sourceFile.isDirectory()) {
            copyDir(sourceFile, targetFile);
        } else {
            File parent = targetFile.getParentFile();
            if (!parent.exists()) {
                if (!parent.mkdirs()) {
                    throw new IOException("Failed to create directory " + parent.getAbsolutePath());
                }
            }
            final InputStream is = new FileInputStream(sourceFile);
            final OutputStream os = new FileOutputStream(targetFile);
            copyStreamAndClose(is, os);
        }
    }

    private static void copyDir(File sourceDir, File targetDir) throws IOException {
        if (targetDir.exists()) {
            if (!targetDir.isDirectory()) {
                throw new IllegalArgumentException("The target is not a directory: " + targetDir.getAbsolutePath());
            }
        } else if (!targetDir.mkdirs()) {
            throw new IOException("Failed to create target directory " + targetDir.getAbsolutePath());
        }

        File[] children = sourceDir.listFiles();
        if (children != null) {
            for (File child : children) {
                copyFile(child, new File(targetDir, child.getName()));
            }
        }
    }

    /**
     * Copy input stream to output stream and close them both
     *
     * @param is input stream
     * @param os output stream
     *
     * @throws IOException for any error
     */
    public static void copyStreamAndClose(InputStream is, OutputStream os) throws IOException {
        try {
            copyStream(is, os, DEFAULT_BUFFER_SIZE);
            // throw an exception if the close fails since some data might be lost
            is.close();
            os.close();
        } finally {
            // ...but still guarantee that they're both closed
            safeClose(is);
            safeClose(os);
        }
    }

    /**
     * Copy input stream to output stream without closing streams. Flushes output stream when done.
     *
     * @param is input stream
     * @param os output stream
     *
     * @throws IOException for any error
     */
    public static void copyStream(InputStream is, OutputStream os) throws IOException {
        copyStream(is, os, DEFAULT_BUFFER_SIZE);
    }

    /**
     * Copy input stream to output stream without closing streams. Flushes output stream when done.
     *
     * @param is input stream
     * @param os output stream
     * @param bufferSize the buffer size to use
     *
     * @throws IOException for any error
     */
    private static void copyStream(InputStream is, OutputStream os, int bufferSize) throws IOException {
        if (is == null) {
            throw new IllegalArgumentException("Input stream is null");
        }
        if (os == null) {
            throw new IllegalArgumentException("Output stream is null");
        }
        byte[] buff = new byte[bufferSize];
        int rc;
        while ((rc = is.read(buff)) != -1)
            os.write(buff, 0, rc);
        os.flush();
    }

    public static void safeClose(final Closeable closeable) {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (IOException e) {
                //
            }
        }
    }

    public static void safeClose(final ZipFile closeable) {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (IOException e) {
                //
            }
        }
    }
}

Related

1. copyFile(File sourceFile, File destinationFile)
2. copyFile(File sourceFile, File destinationFile)
3. copyFile(File sourceFile, File targetDir)
4. copyFile(File sourceFile, File targetDir)
5. copyFile(File sourceFile, File targetFile)
6. copyFile(File sourceFile, String newFileName)
7. copyFile(File sourceLocation, File targetLocation)
8. copyFile(File src, File dest)
9. copyFile(File src, File dest)