public class NarrowImage {
/**
* @param im
* 原始图像
* @param resizeTimes
* 倍数,比如0.5就是缩小一半,0.98等等double类型
* @return 返回处理后的图像
*/
public BufferedImage zoomImage(String src) {
BufferedImage result = null;
try {
File srcfile = new File(src);
if (!srcfile.exists()) {
System.out.println("文件不存在");
}
BufferedImage im = ImageIO.read(srcfile);
/* 原始图像的宽度和高度 */
int width = im.getWidth();
int height = im.getHeight();
//压缩计算
float resizeTimes = 0.3f; /*这个参数是要转化成的倍数,如果是1就是转化成1倍*/
/* 调整后的图片的宽度和高度 */
int toWidth = (int) (width * resizeTimes);
int toHeight = (int) (height * resizeTimes);
/* 新生成结果图片 */
result = new BufferedImage(toWidth, toHeight,
BufferedImage.TYPE_INT_RGB);
result.getGraphics().drawImage(
im.getScaledInstance(toWidth, toHeight,
java.awt.Image.SCALE_SMOOTH), 0, 0, null);
} catch (Exception e) {
System.out.println("创建缩略图发生异常" + e.getMessage());
}
return result;
}
public boolean writeHighQuality(BufferedImage im, String fileFullPath) {
try {
/*输出到文件流*/
FileOutputStream newimage = new FileOutputStream(fileFullPath);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newimage);
JPEGEncodeParam jep = JPEGCodec.getDefaultJPEGEncodeParam(im);
/* 压缩质量 */
jep.setQuality(0.9f, true);
encoder.encode(im, jep);
/*近JPEG编码*/
newimage.close();
return true;
} catch (Exception e) {
return false;
}
}
public static void main(String[] args) {
String inputFoler = "E:\\新建文件夹\\7.jpg" ;
/*这儿填写你存放要缩小图片的文件夹全地址*/
String outputFolder = "E:\\新建文件夹\\07.jpg";
/*这儿填写你转化后的图片存放的文件夹*/
NarrowImage narrowImage = new NarrowImage();
narrowImage.writeHighQuality(narrowImage.zoomImage(inputFoler), outputFolder);
}
}