java简单加密小程序

public static void main(String[] args) throws IOException {    //路径和秘钥    jiamiFile("F:/workspace/Calendar/bbb.txt",12356);}private static void jiamiFile(String url, int key) throws FileNotFoundException, IOException {        File file = new File(url);        if(!file.exists()){            System.out.println("路径错误");            return;        }        String path = file.getPath();   //F:\workspace\Calendar\aaa.txt        int index = path.lastIndexOf('\\'); //20        String sub = path.substring(0, index+1);    //F:\workspace\Calendar\        //System.out.println(sub);        String name = file.getName();   //aaa.txt        //System.out.println("path= "+path);        //System.out.println(sub+"#"+name);        FileInputStream fis = new FileInputStream(path);        FileOutputStream fos = new FileOutputStream(sub+"#"+name); //F:\workspace\Calendar\#aaa.txt        int b;        while((b=fis.read())!=-1){            fos.write(b^key);        }        fis.close();        fos.close();    }