字节缓冲流

代码实现：

package cn.itsource.test;

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

/**
 * @author 
 * 字节缓冲
 *
 */
public class ByteCopy {
	public static void main(String[] args) {
	//	copy(new File("D:\\works\\day0108\\src\\cn\\itsource\\test\\_01tTest.java"), new File("D:\\123.txt"));
	}
	public static void copy(File file1,File file2) {
		
		try(    //创建字节缓冲输入流
				BufferedInputStream bi = new BufferedInputStream(new FileInputStream(file1));
				//创建字节缓冲输出流
				BufferedOutputStream  bd = new BufferedOutputStream(new FileOutputStream(file2));
				) {
			    if (bi==null || bd ==null) {
					throw new NullPointerException("不可为空！");
				}
			    //记录读取个数
			        int num;
			  //      StringBuilder s = new StringBuilder();
			        //创建字节数组
			        byte[] b = new byte[1024];
			        while ((num = bi.read(b))>0) {
			        	//输出到指定位置
						bd.write(b, 0, num);
					}
		      } catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			      e.printStackTrace();
		      } catch (IOException e1) {
			// TODO Auto-generated catch block
			      e1.printStackTrace();
		}
		
	}
}