Java笔记二十一 字节流练习——复制MP3文件的四种方式

package IOByteStream;

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

/**
 * @author 21959
 *
 */
public class CopyMp3Demo {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		//copy_1();
		//copy_2();
		copy_3();
		//copy_4();
	}
	//复制MP3文件，方式一,读取效率低
	public static void copy_1() throws IOException {
		FileInputStream fis1 = new FileInputStream("E:\\software\\QQMusic\\Download\\萧敬腾\\会痛的石头.mp3");
		FileOutputStream fos1 = new FileOutputStream("会痛的石头1.mp3");
		
		int ch1 = 0;
		while((ch1=fis1.read())!=-1)
			fos1.write(ch1);
		fis1.close();
		fos1.close();
	}
	//复制MP3文件，方式二,使用字节数组
	public static void copy_2() throws IOException {
		FileInputStream fis2 = new FileInputStream("E:\\software\\QQMusic\\Download\\萧敬腾\\会痛的石头.mp3");
		FileOutputStream fos2 = new FileOutputStream("会痛的石头2.mp3");
		
		byte[] ch2 = new byte[1024];
		int len2=0;
		while((len2=fis2.read(ch2))!=-1)
			fos2.write(ch2,0,len2);
		fis2.close();
		fos2.close();
	}
	//复制MP3文件，方式三,建立字节缓冲区
	public static void copy_3() throws IOException {
		FileInputStream fis3 = new FileInputStream("E:\\software\\QQMusic\\Download\\萧敬腾\\会痛的石头.mp3");
		FileOutputStream fos3 = new FileOutputStream("会痛的石头3.mp3");
		
		BufferedInputStream bis = new BufferedInputStream(fis3);
		BufferedOutputStream bos = new BufferedOutputStream(fos3);
		
		int ch3 = 0;
		while((ch3=bis.read())!=-1) {
			bos.write((char)ch3);
			bos.flush();
		}
		bis.close();
		bos.close();
	}
	//复制MP3文件，方式四,使用available,不建议
	public static void copy_4() throws IOException {
		FileInputStream fis4 = new FileInputStream("E:\\software\\QQMusic\\Download\\萧敬腾\\会痛的石头.mp3");
		FileOutputStream fos4 = new FileOutputStream("会痛的石头4.mp3");
		
		byte[] ch4 = new byte[fis4.available()];
		
		fis4.read(ch4);
		fos4.write(ch4);
		//fos4.flush();
		
		fis4.close();
		fos4.close();
	}
}