IO流的学习--文件的切割和重组

切割代码

package com.nick.IO;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * 对已知文件进行切割 --> 得到多个碎片文件
 * 
 * @author nickY
 *
 */
public class CutDemo {

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub

        FileInputStream fileInputStream = new FileInputStream("e:\io\1.avi");
        
        byte[] b = new byte[1024 * 1024 * 20];
        int len = 0;
        int name = 1;
        
        while((len = fileInputStream.read(b)) != -1) {
            FileOutputStream fileOutputStream = new FileOutputStream("e:\io1\"+ name +".avi");
            fileOutputStream.write(b, 0, len);
            
            name++;
        }
    }

}

重组代码

 1 package com.nick.IO;
 2 
 3 
 4 import java.io.FileInputStream;
 5 import java.io.FileOutputStream;
 6 import java.io.IOException;
 7 
 8 public class TogetherDemo {
 9 
10     public static void main(String[] args) throws IOException {
11         // TODO Auto-generated method stub
12 
13         FileOutputStream fileOutputStream = new FileOutputStream("e:\io1\3.avi");
14         
15         for(int i = 1; i <= 6; i++) {
16             FileInputStream fileInputStream = new FileInputStream("e:\io1\"+ i + ".avi");
17             
18             byte[] b = new byte[1024];
19             int len  = 0;
20             while((len = fileInputStream.read(b)) != -1) {
21                 fileOutputStream.write(b, 0, len);
22             }
23             fileInputStream.close();
24         }
25         fileOutputStream.close();
26     }
27 
28 }