Java FileInputStream Copy copyFile(File sourceFile, File destFile)

Description

Copies the source file into the destination file.

License

Open Source License

Exception

Parameter	Description
IOException	an exception

Declaration

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

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * All rights reserved. This program and the accompanying materials
 * are 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
 *
 * 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.// ww w.  j  av a 2s  . com
 *******************************************************************************/

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

import java.io.IOException;

public class Main {
    /**
     * Copies the source file into the destination file. The destination file's
     * parent directories will be created (if they do not exist already). The
     * destination file will be overwritten if it already exists.
     *
     * @throws IOException
     */
    public static void copyFile(File sourceFile, File destFile) throws IOException {
        assert sourceFile.exists() && sourceFile.isFile();

        destFile.getParentFile().mkdirs();
        if (!destFile.getParentFile().exists()) {
            throw new IOException("Could not make parent directories");
        }

        destFile.createNewFile();
        if (!destFile.exists()) {
            throw new IOException("Could not create destination file");
        }

        FileOutputStream fos = null;
        FileInputStream fis = null;

        try {
            fos = new FileOutputStream(destFile);
            fis = new FileInputStream(sourceFile);

            byte[] buf = new byte[4096];
            int numRead;

            while ((numRead = fis.read(buf)) >= 0) {
                fos.write(buf, 0, numRead);
            }
        } finally {
            try {
                if (fis != null) {
                    fis.close();
                }
            } finally {
                if (fos != null) {
                    fos.close();
                }
            }
        }
    }
}

Related

1. copyFile(File source, File target, boolean deleteSourceAfter)
2. copyFile(File source, File target, boolean replaceIfExists)
3. copyFile(File sourceDir, File destDir, String filename)
4. copyFile(File sourceFile, File destDir)
5. copyFile(File sourceFile, File destFile)
6. copyFile(File sourceFile, File destFile)
7. copyFile(File sourceFile, File destFile)
8. copyFile(File sourceFile, File destFile)
9. copyFile(File sourceFile, File destFile)