字节输出流和输入流copy图片
import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; public class demo7 { /** * @param args * @throws IOException */ public static void main(String[] args) { // TODO Auto-generated method stub PopyImage(); } public static void PopyImage() { long time1 = System.currentTimeMillis(); //找路径 File file = new File("C:\\Users\\zhangheng\\Desktop\\d9cf11161c4ed2ad.jpg"); //输入流 通道 FileInputStream fileInputStream = null; try { fileInputStream = new FileInputStream(file); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } // 缓冲区 byte[] by =new byte[1024]; // 读取数据 int count =0; //图片的路径 File file1 = new File("C:\\Users\\zhangheng\\Desktop\\dd.jpg"); //输出流通道 FileOutputStream fileOutputStream = null; try { fileOutputStream = new FileOutputStream(file1); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } //读取数据 try { while((count = fileInputStream.read(by)) !=-1){ // System.out.println(new String(by,0,count)); //写数据 fileOutputStream.write(by); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } //后进的先关 try { fileOutputStream.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } // 先进的后关 try { fileInputStream.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } long time2 =System.currentTimeMillis(); System.out.println((time2-time1)); } }