package cn.jbit.copy; import java.io.BufferedInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; public class Test { /** * @param args */ public static void main(String[] args) { // 1、创建一个文件对象 File file = new File("c:\\01.jpg"); // 2、使用字节流对象读入内存 try { InputStream fileIn = new FileInputStream(file); //DataInputStream in = new DataInputStream(fileIn); // 使用缓存区读入对象效率更快 BufferedInputStream in = new BufferedInputStream(fileIn); FileOutputStream fileOut = new FileOutputStream("D:\\3.jpg"); DataOutputStream dataOut = new DataOutputStream(fileOut); // 使用缓存区写入对象效率更快 //BufferedOutputStream dataOut=new BufferedOutputStream(fileOut); int temp; while ((temp = in.read()) != -1) { dataOut.write(temp); } } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }