I/O------字节输出流

package io.day03;

import java.io.FileOutputStream;

import java.io.OutputStream;

public class day03out {

public static void main(String[] args) throws Exception {

//第二个参数，表示是否向末尾追加，true： 追加

//false：不追加（默认）

OutputStream ios =new FileOutputStream("src/b.txt",true);

byte[] bs ={97,98,99,100,101};

//  ios.write(97);

ios.write(bs);

ios.close();

}

}