Java流式处理：将图片从一个文件夹读取并保存到指定位置

  **************************************** 
  *  
  * 通过流的形式读取图片并保存到别的文件夹里 
  *  
  * *************************************/ 
package util; 
import java.io.File;   
import java.io.FileOutputStream;   
import java.awt.Graphics;   
import java.awt.Image;   
import java.awt.image.BufferedImage;   
import com.sun.image.codec.jpeg.JPEGCodec;   
import com.sun.image.codec.jpeg.JPEGImageEncoder; 
public class TuPian{ 
public void jpgTset() throws Exception{   
   
  File _file = new File("d:\\Project\\Test\\pic\\1\\1.jpg"); //读入文件   
        Image src = javax.imageio.ImageIO.read(_file); //构造Image对象   
        int wideth=src.getWidth(null); //得到源图宽   
        int height=src.getHeight(null); //得到源图长   
        System.out.println("长度为"+String.valueOf(wideth)); 
        System.out.println("宽度为"+String.valueOf(height)); 
        BufferedImage tag = new BufferedImage(wideth/2,height/2,BufferedImage.TYPE_INT_RGB);   
        tag.getGraphics().drawImage(src,0,0,wideth/2,height/2,null); //绘制缩小后的图  
         
        // 输出到文件流 
        FileOutputStream out=new FileOutputStream("d:\\Project\\Test\\pic\\2\\newfile.jpg");    
        // File file = new File("newFile.jpg");   
        JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);   
        encoder.encode(tag); //JPEG编码