Java InputStream Copy nio copy(InputStream in, OutputStream out)

Description

copy the in to out

License

Apache License

Parameter

Parameter	Description
in	a parameter
out	a parameter

Exception

Parameter	Description
IOException	an exception

Declaration

@SuppressWarnings("PMD")
public static long copy(InputStream in, OutputStream out) throws IOException 

Method Source Code

//package com.java2s;
/*//from  w ww .j a  v  a 2  s  .  c o  m
 * Copyright 2002-2012 the original author or authors.
 *
 * 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;
import java.nio.channels.FileChannel;

public class Main {
    /**
     * copy the in to out
     * 
     * @param in
     * @param out
     * @return
     * @throws IOException
     */
    @SuppressWarnings("PMD")
    public static long copy(InputStream in, OutputStream out) throws IOException {
        byte[] buf = new byte[1024 * 64];
        long total = 0;
        int size = 0;
        while ((size = in.read(buf)) != -1) {
            out.write(buf, 0, size);
            total += size;
        }

        return total;
    }

    public static long copy(File src, File dest) throws IOException {
        FileChannel in = null;
        FileChannel out = null;
        try {
            in = new FileInputStream(src).getChannel();
            out = new FileOutputStream(dest).getChannel();
            return in.transferTo(0, in.size(), out);
        } finally {
            if (out != null) {
                out.close();
            }
            if (in != null) {
                in.close();
            }
        }
    }
}

Related

1. copy(InputStream in, File f, long startAt)
2. copy(InputStream in, OutputStream out)
3. copy(InputStream in, OutputStream out)
4. copy(InputStream in, OutputStream out)
5. copy(InputStream in, OutputStream out)
6. copy(InputStream in, OutputStream out, boolean closeInput, boolean closeOutput)
7. copy(InputStream input, OutputStream output)
8. copy(InputStream input, OutputStream output)
9. copy(InputStream input, OutputStream output)