JAVA生成JPG缩略图

importjava.io.File;
importjava.io.FileOutputStream;
importjava.awt.Graphics;
importjava.awt.Image;
importjava.awt.image.BufferedImage;
importcom.sun.image.codec.jpeg.JPEGCodec;
importcom.sun.image.codec.jpeg.JPEGImageEncoder;

publicclassJpgTest...{

publicvoidJpgTset()throwsException...{
File_file=newFile("/Order005-0001.jpg");//读入文件
Imagesrc=javax.imageio.ImageIO.read(_file);//构造Image对象
intwideth=src.getWidth(null);//得到源图宽
intheight=src.getHeight(null);//得到源图长
BufferedImagetag=newBufferedImage(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
FileOutputStreamout=newFileOutputStream("newfile.jpg");//输出到文件流
JPEGImageEncoderencoder=JPEGCodec.createJPEGEncoder(out);
encoder.encode(tag);//近JPEG编码
//System.out.print(width+"*"+height);
out.close();
}
}