简单的图片处理测试类：
public class ImageUtil {
static{
System.setProperty("jmagick.systemclassloader","no"); //必须
}
/**
* 压缩图片
*/
public void createimage(String filepath,String topath, int width, int height) {
ImageInfo info = null; //加载图片
MagickImage image = null;
MagickImage scaled = null;
Dimension dim=null;
try {
info = new ImageInfo(filepath);
image = new MagickImage(info);
dim = image.getDimension();
double w = dim.getWidth();
double h = dim.getHeight();
int toHeight = (int)(h*width/w);//按宽度比例缩放
scaled = image.scaleImage(width, toHeight );// 小图片文件的大小.
scaled.setFileName(topath+width+height+".jpg"); //设置图片名称，必须得有保存图片路径
scaled.writeImage(info);
} catch (Exception e) {
e.printStackTrace();
} finally {
if(image!=null)
{
image.destroyImages();
}
if (scaled != null) {
scaled.destroyImages();
}
}
}
public static void main(String[] args){
String filepath="d:/xxxx.jpg";
String topath="d:/xxxxx/";
int width=400;
int height=553;
ImageUtil image=new ImageUtil();
image.createimage(filepath, topath, width, height);
}
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