java NIO练习一
Nio读写文件
View Code
1 import java.io.File;
2 import java.io.FileInputStream;
3 import java.io.FileOutputStream;
4 import java.nio.channels.FileChannel;
5 import java.nio.ByteBuffer;
6 public class NioFileTest
7 {
8 public static void main(String[] args) throws Exception
9 {
10 File file=new File("E:"+File.separator+"vmware"+File.separator+"VMware-workstation-full-7.1.3-324285.exe");
11 File file2=new File("d:"+File.separator+"copy_vm.exe");
12 FileInputStream input=new FileInputStream(file);
13 FileOutputStream output=new FileOutputStream(file2);
14 FileChannel inputChannel=input.getChannel();
15 FileChannel outputChannel=output.getChannel();
16 ByteBuffer bbf=ByteBuffer.allocate(2048);
17 int temp=0;
18 while((temp=inputChannel.read(bbf))!=-1)
19 {
20 bbf.flip();
21 outputChannel.write(bbf);
22 bbf.clear();
23 }
24 input.close();
25 output.close();
26 inputChannel.close();
27 outputChannel.close();
28 }
29 }
