Java Copy Directory copyDirectory(File srcDir, File dstDir)

Description

Copies all files under srcDir to dstDir.

License

Open Source License

Parameter

Parameter	Description
srcDir	source directory
dstDir	destination directory

Exception

Parameter	Description
IOException	throws when fail to create the directory structure when copying files

Declaration

public static void copyDirectory(File srcDir, File dstDir)
        throws IOException 

Method Source Code

//package com.java2s;
/*//from  w  w w . j  a va2  s.c o  m
 *  Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  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.
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Main {
    /**
     * Copies all files under srcDir to dstDir. If dstDir does not exist, it will be created.
     *
     * @param srcDir source directory
     * @param dstDir destination directory
     * @throws IOException throws when fail to create the directory structure when copying files
     */
    public static void copyDirectory(File srcDir, File dstDir)
            throws IOException {
        if (srcDir.isDirectory()) {
            if (!dstDir.exists()) {
                if (!dstDir.mkdirs()) {
                    throw new IOException("Failed to create directory "
                            + dstDir.getAbsolutePath());
                }
            }

            String[] children = srcDir.list();
            if (children != null) {
                for (String child : children) {
                    copyDirectory(new File(srcDir, child), new File(dstDir,
                            child));
                }
            }
        } else {
            copy(srcDir, dstDir);
        }
    }

    /**
     * Copies src file to dst file. If the dst file does not exist, it is created.
     *
     * @param src source file
     * @param dst destination file
     * @throws IOException throws when fail to copy a given file
     */
    public static void copy(File src, File dst) throws IOException {
        if (dst.getParentFile() != null && !dst.getParentFile().exists()) {
            if (!dst.getParentFile().mkdirs()) {
                throw new IOException("Failed to create "
                        + dst.getAbsolutePath());
            }
        }

        try (InputStream in = new FileInputStream(src);
                OutputStream out = new FileOutputStream(dst)) {
            // Transfer bytes from in to out
            byte[] buf = new byte[1024];
            int len;
            while ((len = in.read(buf)) > 0) {
                out.write(buf, 0, len);
            }
        }
    }
}

Related

1. copyDirectory(File srcDir, File dstDir)
2. copyDirectory(File srcDir, File dstDir)
3. copyDirectory(File srcDir, File dstDir)
4. copyDirectory(File srcDir, File dstDir)
5. copyDirectory(File srcDir, File dstDir)
6. copyDirectory(File srcFile, File destFile)
7. copyDirectory(File srcPath, File dstPath)
8. copyDirectory(File srcPath, File dstPath)
9. copyDirectory(final File sourceDir, final File destDir)