Java基础之复制MP3文件

package cn.itcast.p7.io.bytestream.test;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyMp3Test {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {

		copy_4();
	
	}
//	千万不要用，效率没有！
	public static void copy_4() throws IOException {
		FileInputStream fis = new FileInputStream("c:\\0.mp3");		
		FileOutputStream fos = new FileOutputStream("c:\\4.mp3");
		
		
		int ch = 0;
		
		while((ch =fis.read())!=-1){
			fos.write(ch);
		}
		
		fos.close();
		fis.close();
	}

	//不建议。 
	public static void copy_3() throws IOException {
		FileInputStream fis = new FileInputStream("c:\\0.mp3");		
		FileOutputStream fos = new FileOutputStream("c:\\3.mp3");
		
		byte[] buf = new byte[fis.available()];
		fis.read(buf);
		fos.write(buf);
		fos.close();
		fis.close();
	}

	public static void copy_2() throws IOException {
		
		FileInputStream fis = new FileInputStream("c:\\0.mp3");	
		BufferedInputStream bufis = new BufferedInputStream(fis);
		
		FileOutputStream fos = new FileOutputStream("c:\\2.mp3");
		BufferedOutputStream bufos = new BufferedOutputStream(fos);
		
	
		
		int ch = 0;
		
		while((ch=bufis.read())!=-1){
			bufos.write(ch);
		}
		
		bufos.close();
		bufis.close();
	}

	public static void copy_1() throws IOException {
		
		FileInputStream fis = new FileInputStream("c:\\0.mp3");		
		FileOutputStream fos = new FileOutputStream("c:\\1.mp3");
		
		byte[] buf = new byte[1024];
		
		int len = 0;
		
		while((len=fis.read(buf))!=-1){
			fos.write(buf,0,len);
		}
		
		fos.close();
		fis.close();
	}
	
	

}

我的微信号: xiang20200106 ,欢迎大家找我聊天
— 【 THE END 】—

本公众号已经整理一套包含前端和后端的全套电子书教程，限时免费赠送，请在公众号里回复「电子书」获取！