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import net.coobird.thumbnailator.Thumbnails;
public class GoogleThumbnails {
public static void main(String[] args) throws Exception {
Thumbnails.of("/Users/Biao/Pictures/Rock_stars_by_vladstudio2.jpg")
.size(300, 300).outputQuality(0.7)
.toFile("/Users/Biao/Desktop/x.jpg");
}
}
/**
* 采用指定宽度、高度或压缩比例 的方式对图片进行压缩
* @param imgsrc 源图片地址
* @param imgdist 目标图片地址
* @param widthdist 压缩后图片宽度(当rate==null时,必传)
* @param heightdist 压缩后图片高度(当rate==null时,必传)
* @param rate 压缩比例
*/
public static void reduceImg(String imgsrc, String imgdist, int widthdist,
int heightdist, Float rate) {
try {
File srcfile = new File(imgsrc);
// 检查文件是否存在
if (!srcfile.exists()) {
return;
}
// 如果rate不为空说明是按比例压缩
if (rate != null && rate > 0) {
// 获取文件高度和宽度
int[] results = getImgWidth(srcfile);
if (results == null || results[0] == 0 || results[1] == 0) {
return;
} else {
widthdist = (int) (results[0] * rate);
heightdist = (int) (results[1] * rate);
}
}
// 开始读取文件并进行压缩
Image src = javax.imageio.ImageIO.read(srcfile);
BufferedImage tag = new BufferedImage((int) widthdist,
(int) heightdist, BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(
src.getScaledInstance(widthdist, heightdist,
Image.SCALE_SMOOTH), 0, 0, null);
FileOutputStream out = new FileOutputStream(imgdist);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(tag);
out.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}