java实现图片裁切的工具类实例

package com.yanek.util;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;   }  } }}