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package UDPDemo;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.RandomAccessFile;import java.nio.ByteBuffer;import java.nio.MappedByteBuffer;import java.nio.channels.FileChannel;public class RAMMapped {	/**	 * @param args	 */	public static void main(String[] args) throws IOException{		File infile2 = new File ("F:"+File.separator+"maoxiao.txt");		RandomAccessFile infile = new RandomAccessFile(infile2,"rw");		File outfile = new File("F:"+File.separator+"out.txt");						FileOutputStream fot = new FileOutputStream(outfile);				FileChannel ichannel = infile.getChannel();		FileChannel ochannel = fot.getChannel();				MappedByteBuffer  inbuf = ichannel.map(FileChannel.MapMode.READ_WRITE, 0, infile.length());//将文件映射到内存		ByteBuffer  outbuf = ByteBuffer.allocate((int) infile.length());						ichannel.read(inbuf);		inbuf.flip();		while(inbuf.hasRemaining()){			outbuf.put(inbuf.get());		}		outbuf.flip();		ochannel.write(outbuf);		inbuf.clear();		outbuf.clear();						fot.flush();				ochannel.close();		fot.close();		ichannel.close();										}}

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