java NIO练习一

Nio读写文件

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.channels.FileChannel;
import java.nio.ByteBuffer;
public class NioFileTest
{
    public static void main(String[] args) throws Exception
    {
        File file=new File("E:"+File.separator+"vmware"+File.separator+"VMware-workstation-full-7.1.3-324285.exe");
        File file2=new File("d:"+File.separator+"copy_vm.exe");
        FileInputStream input=new FileInputStream(file);
        FileOutputStream output=new FileOutputStream(file2);
        FileChannel inputChannel=input.getChannel();
        FileChannel outputChannel=output.getChannel();
        ByteBuffer bbf=ByteBuffer.allocate(2048);
        int temp=0;
        while((temp=inputChannel.read(bbf))!=-1)
        {
            bbf.flip();
            outputChannel.write(bbf);
            bbf.clear();
        }
        input.close();
        output.close();
        inputChannel.close();
        outputChannel.close();
    }
}