java图片裁切工具类

import java.awt.Rectangle;    import java.awt.image.BufferedImage;    import java.io.File;    import java.io.FileInputStream;    import java.io.IOException;    import java.util.Iterator;        import javax.imageio.ImageIO;    import javax.imageio.ImageReadParam;    import javax.imageio.ImageReader;    import javax.imageio.stream.ImageInputStream;        public class ImgCutUtil {            /**        * @param args        */        public static void main(String[] args) {                ImgCutUtil.cut(30, 50, 300, 400, "d:/1.jpg", "d:/100.jpg");            }            /**        * 图片裁切        * @param x1 选择区域左上角的x坐标        * @param y1 选择区域左上角的y坐标        * @param width 选择区域的宽度        * @param height 选择区域的高度        * @param sourcePath 源图片路径        * @param descpath 裁切后图片的保存路径        */        public static void cut(int x1, int y1, int width, int height,                String sourcePath, String descpath) {                FileInputStream is = null;            ImageInputStream iis = null;            try {                is = new FileInputStream(sourcePath);                String fileSuffix = sourcePath.substring(sourcePath                        .lastIndexOf(".") + 1);                Iterator<ImageReader> it = ImageIO                        .getImageReadersByFormatName(fileSuffix);                ImageReader reader = it.next();                iis = ImageIO.createImageInputStream(is);                reader.setInput(iis, true);                ImageReadParam param = reader.getDefaultReadParam();                Rectangle rect = new Rectangle(x1, y1, width, height);                param.setSourceRegion(rect);                BufferedImage bi = reader.read(0, param);                ImageIO.write(bi, fileSuffix, new File(descpath));            } catch (Exception ex) {                ex.printStackTrace();            } finally {                if (is != null) {                    try {                        is.close();                    } catch (IOException e) {                        e.printStackTrace();                    }                    is = null;                }                if (iis != null) {                    try {                        iis.close();                    } catch (IOException e) {                        e.printStackTrace();                    }                    iis = null;                }            }            }        }