1 package edzy.nio;
2
3
4 import java.io.IOException;
5 import java.io.RandomAccessFile;
6 import java.nio.ByteBuffer;
7 import java.nio.channels.FileChannel;
8
9 /*
10
11 * 分散和聚集
12 *
13 */
14 public class Gather {
15
16 public static void main(String[] args) throws IOException {
17
18 RandomAccessFile fin = new RandomAccessFile("./src/main/java/edzy/nio/centos7.txt","rw");
19 FileChannel in = fin.getChannel();
20
21 //分配多个指定大小的缓存区
22 ByteBuffer buf1 = ByteBuffer.allocate(512);
23 ByteBuffer buf2 = ByteBuffer.allocate(1024);
24 // ByteBuffer buf3 = ByteBuffer.allocate(1024);
25
26 //分离读取
27 ByteBuffer[] buffers = {buf1,buf2};
28 in.read(buffers);
29
30 for (ByteBuffer buf : buffers){
31 buf.flip();
32 System.out.println(new String (buf.array(),0,buf.limit()));
33 System.out.println("########################################");
34 buf.clear();
35
36 }
37
38 RandomAccessFile fout = new RandomAccessFile("./centos.txt","rw");
39 FileChannel out = fout.getChannel();
40 out.write(buffers);
41
42 out.close();
43 in.close();
44 fout.close();
45 fin.close();
46
47
48 }
49 }
