Java基础之复制MP3文件

傷城~ 2022-12-15 15:29 210阅读 0赞

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();
    	}
    	
    	
    
    }

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