package www_3;

import *;

public class CopyFile {
    public static void main(String[] args) {
        String file1 = " ", file2 = " ";
        int ch;
        long cnt = 0;
        if (args.length == 2) {
            if (args[0].equals(args[1])) {
                System.out.println("源文件和目标文件名不能相同");
                System.exit(0);
            } else {
                file1 = args[0];
                file2 = args[1];
            }
        } else {
            System.out.println("请指定源文件名和目标文件名！");
            System.exit(0);
        }
        try {
            FileInputStream fis = new FileInputStream(file1);
            FileOutputStream fos = new FileOutputStream(file2);
            cnt = fis.available();
            while ((ch = fis.read()) != -1) {
                System.out.write(ch);
                fos.write(ch);
            }
            fis.close();
            fos.close();
        } catch (FileNotFoundException e) {
            System.out.println("源文件：未找到！");
            System.exit( -1);
        } catch (IOException e) {
            System.out.println(e.toString());
        }
        System.out.println("\n复制文件完成，共" + cnt + "个字节！");
    }
}