Java字节流

	 一、字节输入流	
		FileInputStream fileInputStream=null;		
	try {
		fileInputStream=new FileInputStream(fileUrl);
		byte []by=fileInputStream.readAllBytes();
		String string=new String(by);
		System.out.println(string);
		
	} catch (FileNotFoundException e) {		
		e.printStackTrace();
	}finally {
		fileInputStream.close();
	}
	二、字节输出流
	FileOutputStream fileOutputStream=null;
	try {
		
		fileOutputStream=new FileOutputStream("C:\\Users\\zhang\\Desktop\\zhang\\a.txt");
		String string=new String("ABCDEFG");
		byte by[]=string.getBytes();
		fileOutputStream.write(by);
	} catch (FileNotFoundException e) {
		
		e.printStackTrace();
	}finally {
		fileOutputStream.close();
	}