IO剪辑图片

import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

public class Tu {

 public static void main(String[] args) throws IOException {
   String fn ="D:\hllo\timg[3].jpg";//修改图像尺寸，可以生成缩略图。
   File s = new File(fn);
   BufferedImage src =ImageIO.read(s);
   int w = 250;//调整图标长宽。
   int h = 250;
   BufferedImage i = new BufferedImage (w,h, BufferedImage.TYPE_INT_RGB);
   Graphics g = i.getGraphics();
   int x = 180;//调整大小。
   int y = 70;
   g.drawImage(src,0,0,w,h,x,y,x+w,y+ h, null);
   g.dispose();
   String newfn =fn.replace(".","_"+w+"_"+h+".");
 
   ImageIO.write(i,"jpg",new File(newfn));

 }

}