Java File Read via ByteBuffer readBytes(String file)

Description

read Bytes

License

Open Source License

Declaration

public static ByteBuffer readBytes(String file) throws IOException 

Method Source Code

//package com.java2s;
/*  Copyright (c) 2010 Xiaoyun Zhu
 * /*  w w w  .  j  av a2s  .c  om*/
 *  Permission is hereby granted, free of charge, to any person obtaining a copy  
 *  of this software and associated documentation files (the "Software"), to deal  
 *  in the Software without restriction, including without limitation the rights  
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell  
 *  copies of the Software, and to permit persons to whom the Software is  
 *  furnished to do so, subject to the following conditions:
 *  
 *  The above copyright notice and this permission notice shall be included in  
 *  all copies or substantial portions of the Software.
 *  
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE  
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER  
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,  
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN  
 *  THE SOFTWARE.  
 */

import java.io.ByteArrayOutputStream;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.io.Reader;

import java.io.Writer;

import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;

public class Main {
    public static ByteBuffer readBytes(String file) throws IOException {
        ByteArrayOutputStream dataOut = new ByteArrayOutputStream();
        FileChannel fChannel = new RandomAccessFile(file, "r").getChannel();
        fChannel.transferTo(0, fChannel.size(),
                Channels.newChannel(dataOut));
        fChannel.close();
        return ByteBuffer.wrap(dataOut.toByteArray());
    }

    public static final void close(final OutputStream out) {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
                // silent
            }
        }
    }

    public static final void close(final InputStream in) {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                // silent
            }
        }
    }

    public static final void close(final Reader in) {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                // silent
            }
        }
    }

    public static final void close(final Writer out) {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
                // silent
            }
        }
    }
}

Related

1. readBytes(final InputStream in, final int length)
2. readBytes(final String file)
3. readBytes(InputStream is)
4. readBytes(Path file)
5. readBytes(ReadableByteChannel channel, byte[] array)
6. readCode(byte[] message)
7. readColumnarKeyBlockDataForNoDictionaryCols(byte[] columnarKeyBlockData)
8. readContent(File file)
9. readContentsNIO(FileInputStream input, String encoding, boolean decodeNIO)