- package cn.com.haobo.image;
- import java.awt.Image;
- import java.awt.Rectangle;
- import java.awt.geom.AffineTransform;
- import java.awt.image.AffineTransformOp;
- import java.awt.image.BufferedImage;
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.util.Iterator;
- import javax.imageio.ImageIO;
- import javax.imageio.ImageReadParam;
- import javax.imageio.ImageReader;
- import javax.imageio.stream.ImageInputStream;
- public class ImageHelper {
- /**
- * 概述:根据尺寸图片居中裁剪
- * src :源路径,目标路径,目标宽,目标高
- * 返回值:void
- * 作者:徐浩波 xuhaobo@hiveview.com
- * 创建日期:2015-4-30下午5:27:24
- */
- public static void cutCenterImage(String src, String dest, int w, int h) throws IOException {
- Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName("jpg");
- ImageReader reader = iterator.next();
- InputStream in = new FileInputStream(src);
- ImageInputStream iis = ImageIO.createImageInputStream(in);
- reader.setInput(iis, true);
- ImageReadParam param = reader.getDefaultReadParam();
- int imageIndex = 0;
- Rectangle rect = new Rectangle((reader.getWidth(imageIndex) - w) / 2, (reader.getHeight(imageIndex) - h) / 2,
- w, h);
- param.setSourceRegion(rect);
- BufferedImage bi = reader.read(0, param);
- ImageIO.write(bi, "jpg", new File(dest));
- }
- /**
- * 概述:图片裁剪二分之一
- * src :源路径,目标路径
- * 返回值:void
- * 作者:徐浩波 xuhaobo@hiveview.com
- * 创建日期:2015-4-30下午5:27:24
- */
- public static void cutHalfImage(String src, String dest) throws IOException {
- Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName("jpg");
- ImageReader reader = (ImageReader) iterator.next();
- InputStream in = new FileInputStream(src);
- ImageInputStream iis = ImageIO.createImageInputStream(in);
- reader.setInput(iis, true);
- ImageReadParam param = reader.getDefaultReadParam();
- int imageIndex = 0;
- int width = reader.getWidth(imageIndex) / 2;
- int height = reader.getHeight(imageIndex) / 2;
- Rectangle rect = new Rectangle(width / 2, height / 2, width, height);
- param.setSourceRegion(rect);
- BufferedImage bi = reader.read(0, param);
- ImageIO.write(bi, "jpg", new File(dest));
- }
- /**
- * 概述:图片裁剪通用接口
- * src :源路径,目标路径,目标图片左上坐标x,y,目标宽,目标高
- * 返回值:void
- * 作者:徐浩波 xuhaobo@hiveview.com
- * 创建日期:2015-4-30下午5:27:24
- */
- public static void cutImage(String src, String dest, int x, int y, int w, int h) throws IOException {
- Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName("jpg");
- ImageReader reader = (ImageReader) iterator.next();
- InputStream in = new FileInputStream(src);
- ImageInputStream iis = ImageIO.createImageInputStream(in);
- reader.setInput(iis, true);
- ImageReadParam param = reader.getDefaultReadParam();
- Rectangle rect = new Rectangle(x, y, w, h);
- param.setSourceRegion(rect);
- BufferedImage bi = reader.read(0, param);
- ImageIO.write(bi, "jpg", new File(dest));
- }
- /**
- * 概述:图片缩放
- * src :源路径,目标路径,目标宽,目标高
- * 返回值:void
- * 作者:徐浩波 xuhaobo@hiveview.com
- * 创建日期:2015-4-30下午5:27:24
- */
- public static void zoomImage(String src, String dest, int w, int h) throws Exception {
- double wr = 0, hr = 0;
- File srcFile = new File(src);
- File destFile = new File(dest);
- BufferedImage bufImg = ImageIO.read(srcFile);
- Image Itemp = bufImg.getScaledInstance(w, h, Image.SCALE_SMOOTH);
- wr = w * 1.0 / bufImg.getWidth();
- hr = h * 1.0 / bufImg.getHeight();
- AffineTransformOp ato = new AffineTransformOp(AffineTransform.getScaleInstance(wr, hr), null);
- Itemp = ato.filter(bufImg, null);
- try {
- ImageIO.write((BufferedImage) Itemp, dest.substring(dest.lastIndexOf(".") + 1), destFile);
- } catch (Exception ex) {
- ex.printStackTrace();
- }
- }
- public static void main(String[] args) {
- try {
- // zoomImage("/data/222.jpg", "/data/0.jpg", 490, 760);
- // cutHalfImage("/data/0.jpg", "/data/1.jpg");
- // cutCenterImage("/data/0.jpg", "/data/1.jpg",280,380);
- // cutImage("/data/0.jpg", "/data/1.jpg",30,60,490,40);
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/3004201512469.html
来源: http://www.codesnippet.cn/detail/3004201512469.html