Java黑皮书17章第10题

 拆分文件的方法

import java.io.*;
import java.util.*;
public class Exercise17_10 {
	public static void main(String[] args) throws Exception{
		Scanner sc = new Scanner(System.in);
		ArrayList array = new ArrayList<>();
		System.out.print("输入文件路径:");
		String filename = sc.nextLine();//输入文件路径
		File file = new File(filename);
		split(file);                    //拆分方法
	}
	public static void split(File file){
		byte[] data = new byte[(int)file.length()];
		try{
			FileInputStream re = new FileInputStream(file);//读取
			re.read(data);
			re.close();
		}catch (FileNotFoundException ex){
			ex.printStackTrace();
		}catch (IOException ex){
			ex.printStackTrace();
		}
		System.out.println(data.length / 1024 + "k");//原文件大小
		int len = 1024;
		int n = (int)(file.length() / len);//拆分后子文件个数，大小均为1kb
		File[] file1 = new File[n + 1];
		for(int i=0;i