Java FileInputStream Copy copyFile(File target, File source)

Description

Copies a file.

License

Apache License

Parameter

Parameter	Description
target	the target file
source	the source file

Exception

Parameter	Description
IOException	in any case of I/O problem, trying to close the involved files before end if possible

Declaration

public static void copyFile(File target, File source) throws IOException 

Method Source Code

//package com.java2s;
/*//  ww  w . j  a  v  a 2  s . c o m
 * Copyright 2009-2017 University of Hildesheim, Software Systems Engineering
 *
 * 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.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class Main {
    /**
     * Copies a file.
     * 
     * @param target the target file
     * @param source the source file
     * @throws IOException in any case of I/O problem, trying to close the involved files before end if possible
     */
    public static void copyFile(File target, File source) throws IOException {
        FileInputStream in = null;
        try {
            in = new FileInputStream(source);
            copyToFile(target, in);
            in.close();
        } catch (IOException e) {
            if (null != in) {
                closeQuietly(in);
            }
            throw e;
        }
    }

    /**
     * Copies the contents of <code>in</code> at the current position to <code>file</code>.
     * Does not attempt to close <code>in</code>. Uses a default buffer of size 1024.
     * 
     * @param file the file to write to
     * @param in the input stream
     * @throws IOException in any case of I/O problem, trying to close <code>file</code> before end if possible
     */
    public static void copyToFile(File file, InputStream in) throws IOException {
        copyToFile(file, in, null);
    }

    /**
     * Copies the contents of <code>in</code> at the current position to <code>file</code>.
     * Does not attempt to close <code>in</code>. Uses a default buffer of size 1024.
     * 
     * @param file the file to write to
     * @param in the input stream
     * @param buffer a copy buffer (if <b>null</b> a default one of size 1024 is used)
     * @throws IOException in any case of I/O problem, trying to close <code>file</code> before if possible
     */
    public static void copyToFile(File file, InputStream in, byte[] buffer) throws IOException {
        if (null == buffer) {
            buffer = new byte[1024];
        }
        FileOutputStream fos = new FileOutputStream(file);
        try {
            int read;
            do {
                read = in.read(buffer);
                if (read > 0) {
                    fos.write(buffer, 0, read);
                }
            } while (read > 0);
        } catch (IOException e) {
            closeQuietly(fos);
            throw e;
        }
        fos.close();
    }

    /**
     * Closes a closeable quietly, i.e., without exception.
     * 
     * @param closeable the closeable
     */
    public static void closeQuietly(Closeable closeable) {
        if (null != closeable) {
            try {
                closeable.close();
            } catch (IOException e1) {
            }
        }
    }
}

Related

1. copyFile(File srcFile, File dstFile)
2. copyFile(File srcFile, File dstFile)
3. copyFile(File srcFile, File dstFile)
4. copyFile(File srcPath, File dstPath)
5. copyfile(File srFile, File dtFile)
6. copyFile(File targetFile, File file)
7. copyFile(File targetFile, File file)
8. copyFile(final File from, final File to)
9. copyFile(final File fromFile, final File toFile)