Java InputStream copy to an OutputStream for a large file (over 2GB)
//package com.demo2s; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; public class Main { public static void main(String[] argv) throws Exception { }/*from w w w.j ava 2 s . c om*/ /** * The default buffer size to use. */ private static final int DEFAULT_BUFFER_SIZE = 1024 * 4; /** * Copy bytes from a large (over 2GB) <code>InputStream</code> to an * <code>OutputStream</code>. * <p> * This method buffers the input internally, so there is no need to use a * <code>BufferedInputStream</code>. * * @param input the <code>InputStream</code> to read from * @param output the <code>OutputStream</code> to write to * @return the number of bytes copied * @throws NullPointerException if the input or output is null * @throws IOException if an I/O error occurs * @since Commons IO 1.3 */ public static long copyLarge(InputStream input, OutputStream output) throws IOException { byte[] buffer = new byte[DEFAULT_BUFFER_SIZE]; long count = 0; int n = 0; while (-1 != (n = input.read(buffer))) { output.write(buffer, 0, n); count += n; } return count; } } /* * 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. */