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 JpgTest {
public void jpgTset() throws Exception{
File _file = new File("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
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
FileOutputStream out=new FileOutputStream("newfile.jpg"); //输出到文件流
// File file = new File("newFile.jpg");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(tag); //JPEG编码
out.close();
}
public static void main(String[] args){
try{
new JpgTest().jpgTset();
}catch(Exception e){
e.printStackTrace();
}
}
}
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