字节流读入，输出文件——java

import  java.io.*;
import java.util.*;
public class Main{
    public static void main(String[] args)throws Exception{
        OutputStream out=new FileOutputStream("C:\\Users\\super\\Desktop\\test.txt.txt");
        Scanner sc=new Scanner(System.in);
        while(sc.hasNext()){
            String str=sc.nextLine();
            if(str.equals("end")) break;
            byte[] b=str.getBytes();//转化为字节，并写入
            for(int i=0;i<b.length;i++){
                out.write(b[i]);
            }
        }
          out.close();
        FileInputStream in=new FileInputStream("C:\\Users\\super\\Desktop\\test.txt.txt");
        int b=0;
        //输出部分
        while(true){
            b=in.read();
            if(b==-1) break;
            else
            System.out.println(b);
        }
           in.close();
    }
}