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

package com.nick.IO;


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

public class TogetherDemo {

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

        FileOutputStream fileOutputStream = new FileOutputStream("e:\io1\3.avi");
        
        for(int i = 1; i <= 6; i++) {
            FileInputStream fileInputStream = new FileInputStream("e:\io1\"+ i + ".avi");
            
            byte[] b = new byte[1024];
            int len  = 0;
            while((len = fileInputStream.read(b)) != -1) {
                fileOutputStream.write(b, 0, len);
            }
            fileInputStream.close();
        }
        fileOutputStream.close();
    }

}