public class InAndOutDemo {
    public static void main(String[] args) {
        FileInputStream fis=null;//输入流--读
        FileOutputStream fos=null;//输出流--读

        try {
            fis=new FileInputStream("D:/我的青春谁做主.txt");
            fos=new FileOutputStream("C:/myFile/my Prime.txt");
            byte[] words=new byte[1024];
            int len=-1;
            //文件中的内容读取出来存放到了字节数组words中
            while((len=fis.read(words))!=-1){
             //将字节数组words写出到输出流fos中
                fos.write(words,0,len);
            }
            System.out.println("文件复制完毕！");
        }catch (FileNotFoundException e){
            e.printStackTrace();
        }catch (IOException e){
            e.printStackTrace();
        }finally {
            try {
                fos.close();
                fis.close();
            }catch (IOException e){
                e.printStackTrace();
            }
        }

    }
}