/**
* 根据宽高编辑图片
*
* @param outPath
* 输出文件路径
* @param width
* 输出文件宽
* @param height
* 输出文件高
* @throws Exception
*/
public static void dealImage(String filePath, String outPath, Integer width,
Integer height) throws Exception {
// 读取本地文件：
InputStream is = new FileInputStream(filePath);
//判断图片大小 0---500k 进行4倍压缩 500----1024k 进行6倍压缩 1024以上进行8倍压缩
File picture = new File(filePath);
int cutMultiple = 2;
if (picture.exists()){
//int picsize =Integer.parseInt(new DecimalFormat("0").format(picture.length()/1024.0));//四舍五入
try {
int picsize = (int) (picture.length()/1024.0);//非四舍五入
if(picsize<=512){
cutMultiple=4;
}else if(picsize>512 && picsize<=1024){
cutMultiple=6;
}else if(picsize>1024){
cutMultiple=8;
}
} catch (Exception e) {//假容错处理
cutMultiple=2;
}
}
Image image = ImageIO.read(is);
float tagsize = 200;
int old_w = image.getWidth(null);
int old_h = image.getHeight(null);
int tempsize;
BufferedImage tag = new BufferedImage(old_w/cutMultiple, old_h/cutMultiple, BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(image, 0, 0, old_w/cutMultiple, old_h/cutMultiple, null);
FileOutputStream newimage = new FileOutputStream(outPath);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newimage);
encoder.encode(tag);
newimage.close();
}