Here you can find the source of copyFile(File file, File dir)
file to location dir.
| Parameter | Description |
|---|---|
| file | The file to copy. |
| dir | The destination directory. |
| Parameter | Description |
|---|---|
| IOException | For various reason: if <code>file</code> does not exist or is not readable, if thedestination directory does not exist or isn't a directory, or if the file can't becopied for any reason. |
public static final void copyFile(File file, File dir) throws IOException
//package com.java2s; /*//from w ww .j av a 2 s.c o m * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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; public class Main { /** * Copy file <code>file</code> to location <code>dir</code>. This method will not fail silently. * Anything that prevents the copy from happening will be treated as an error condition. If the * method does not throw an exception, the copy was successful. * * <p> * <b>Note: </b> this is a completely brain-dead implementation of file copy. The complete file is * read into memory before it is copied. If you need something more sophisticated for copying * large files, feel free to add your improvements. * * @param file * The file to copy. * @param dir * The destination directory. * @throws IOException * For various reason: if <code>file</code> does not exist or is not readable, if the * destination directory does not exist or isn't a directory, or if the file can't be * copied for any reason. */ public static final void copyFile(File file, File dir) throws IOException { if (!file.exists() || !file.canRead()) { throw new IOException("File does not exist or is not readable: " + file.getAbsolutePath()); } if (!dir.exists() || !dir.isDirectory()) { throw new IOException("Destination does not exist or is not a directory: " + dir.getAbsolutePath()); } File outFile = new File(dir, file.getName()); if (outFile.exists() && !outFile.canWrite()) { throw new IOException("Can't write output file: " + outFile); } byte[] bytes = new byte[(int) file.length()]; FileInputStream is = null; FileOutputStream os = null; try { is = new FileInputStream(file); os = new FileOutputStream(outFile); while (true) { int count = is.read(bytes); if (0 > count) { break; } os.write(bytes, 0, count); } } finally { if (null != is) { is.close(); } if (null != os) { os.close(); } } } }