Here you can find the source of copyDirectory(final File src, final File dest)
public static void copyDirectory(final File src, final File dest) throws IOException
//package com.java2s; /*//from w ww . j a v a2 s. co m * JBoss, Home of Professional Open Source. * Copyright 2012 Red Hat, Inc., and individual contributors * as indicated by the @author tags. * * 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.BufferedInputStream; import java.io.BufferedOutputStream; 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; public class Main { public static void copyDirectory(final File src, final File dest) throws IOException { String[] files = src.list(); for (String f : files) { File current = new File(src, f); if (current.isDirectory()) { copyDirectory(current, new File(dest, f)); } else { copyFile(current, new File(dest, f)); } } } public static void copyFile(final File src, final File dest) throws IOException { final InputStream in = new BufferedInputStream(new FileInputStream(src)); try { copyFile(in, dest); } finally { close(in); } } public static void copyFile(final InputStream in, final File dest) throws IOException { dest.getParentFile().mkdirs(); final OutputStream out = new BufferedOutputStream(new FileOutputStream(dest)); try { int i = in.read(); while (i != -1) { out.write(i); i = in.read(); } } finally { close(out); } } public static void close(Closeable closeable) { try { closeable.close(); } catch (IOException ignore) { } } }