java基础—IO流——字节流的操作演示

字节流的操作演示

1.将一个文本通过字符流操作复制到指定目录下
2.将一个文本通过字节流操作复制到指定目录下
3.将一个Mp3文件通过字节流操作方式复制到指定目录下，并加入缓冲技术
4.简写复制Mp3文件的代码

import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;//----------------------------------------------------------------------------------------------------------------------public class FileByteStreamDemo {public static void main(String[] args) {TextCopy();TextCopy2();Mp3Copy3();Mp3Copy4();}//----------------------------------------------------------------------------------------------------------------------private static void Mp3Copy4() {// 将Copy  Mp3  文件的代码简写BufferedInputStream bis = null;BufferedOutputStream bos = null;try {bis=new BufferedInputStream(new FileInputStream("C:\\Users\\Administrator\\Desktop\\测试文件夹\\陈楚生-黄金时代.mp3"));bos = new BufferedOutputStream(new FileOutputStream("C:\\Users\\Administrator\\Desktop\\测试文件夹\\2ByteStreamCopyMp3.mp3"));int len = 0;byte[] b = new byte[1024*1024];while((len=bis.read(b))!=-1){bos.write(b);bos.flush();}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}finally{try {bos.close();} catch (IOException e) {e.printStackTrace();}try {bis.close();} catch (IOException e)             {e.printStackTrace();}}}//----------------------------------------------------------------------------------------------------------------------<h2><span style="font-family:FangSong_GB2312;">3.将一个Mp3文件通过字节流操作方式复制到指定目录下，并加入缓冲技术</span></h2>

private static void Mp3Copy3() {// 加入字节的缓冲区//向指定目录下Copy一个mp3文件BufferedInputStream bis = null;BufferedOutputStream bos = null;FileInputStream fis =null;FileOutputStream fos = null;try {fis = new FileInputStream("C:\\Users\\Administrator\\Desktop\\测试文件夹\\陈楚生-黄金时代.mp3");bis = new BufferedInputStream(fis);fos = new FileOutputStream("C:\\Users\\Administrator\\Desktop\\测试文件夹\\ByteStreamCopyMp3.mp3");bos = new BufferedOutputStream(fos);int len = 0;byte[] b = new byte[1024*1024];while((len=bis.read(b))!=-1){bos.write(b);bos.flush();}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}finally{try {bis.close();} catch (IOException e) {e.printStackTrace();}try {bos.close();} catch (IOException e) {e.printStackTrace();}}}//----------------------------------------------------------------------------------------------------------------------

<h2><span style="font-family:FangSong_GB2312;">2.将一个文本通过字节流操作复制到指定目录下</span></h2>

private static void TextCopy2() {// 使用字节流将一个文本复制到指定的目录下FileInputStream fis = null;FileOutputStream fos = null;try {fis = new FileInputStream("C:\\Users\\Administrator\\Desktop\\测试文件夹\\初三化学复习资料.doc");fos = new FileOutputStream("C:\\Users\\Administrator\\Desktop\\测试文件夹\\ByteStreamCopyText.doc");int len = 0;byte[] b = new byte[1024];while((len=fis.read(b))!=-1){fos.write(b);    fos.flush();    }} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}finally{try{fos.close();} catch (IOException e1) {e1.printStackTrace();}try {fis.close();} catch (IOException e) {e.printStackTrace();}}}//----------------------------------------------------------------------------------------------------------------------<h2><span style="font-family:FangSong_GB2312;"></span></h2><h2></h2>

<h2 style="font-family: monospace; white-space: pre;"><span style="font-family: FangSong_GB2312;">1.将一个文本通过字符流操作复制到指定目录下</span></h2>

private static void TextCopy() {// 使用字符流将一个文本复制到指定目录下//创建一个缓冲区BufferedReader br = null;BufferedWriter bw = null;try {br= new BufferedReader(new FileReader("C:\\Users\\Administrator\\Desktop\\测试文件夹\\初三化学复习资料.doc"));bw = new BufferedWriter(new FileWriter("C:\\Users\\Administrator\\Desktop\\测试文件夹\\Copy复习资料.doc"));String len = null;while((len=br.readLine())!=null){System.out.println(len);bw.write(len);bw.newLine();bw.flush();}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}finally{try {bw.close();} catch (IOException e) {e.printStackTrace();}try {br.close();} catch (IOException e) {e.printStackTrace();}}}}

运行程序：