java--IO--BufferedInputStream和BufferedOutputStream

package com.model.io.copy;

import java.io.*;

/**
 * @Description:测试类
 * @Author: 张紫韩
 * @Crete 2021/6/18 20:50
 * BufferedInputStream和BufferedOutputStream字节处理流
 * 既可以处理二进制文件有可以处理文本文件，但是有可能会出现乱码问题
 * 一个字母是一个字节，一个汉字是三个字节
 *
 */
public class CopyDemo03 {
    public static void main(String[] args) throws IOException {
        String fileFrom="D:\\qq\\IDEA\\IdeaProjects\\java_mianshi_test\\mianshi_io\\src\\main\\resources\\a.jpg";
        String fileTo="D:\\qq\\IDEA\\IdeaProjects\\java_mianshi_test\\mianshi_io\\src\\main\\resources\\File\\aa.jpg";
        BufferedInputStream bufferedInputStream=null;
        BufferedOutputStream bufferedOutputStream=null;
        byte[] buff = new byte[1024];
        int readCount=0;
        try {
            bufferedInputStream = new BufferedInputStream(new FileInputStream(fileFrom));
            bufferedOutputStream=new BufferedOutputStream(new FileOutputStream(fileTo,true));
            //readLine返回null代表读取完成，reed返回-1代表读取完
            while((readCount=bufferedInputStream.read(buff))!=-1){
                bufferedOutputStream.write(buff,0,readCount);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if (bufferedInputStream!=null){
                bufferedInputStream.close();
            }
            if (bufferedOutputStream!=null){
                bufferedOutputStream.close();
            }
            System.out.println("文件拷贝完成");
        }
    }
}