Java图片缩放剪切解决
发布时间：2021-11-24 12:34:26 所属栏目：教程 来源：互联网
导读：Java图片缩放剪切处理： package action; import java.awt.Graphics; import java.awt.Image; import java.awt.Toolkit; import java.awt.image.BufferedImage; import java.awt.image.CropImageFilter; import java.awt.image.FilteredImageSource; import
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Java图片缩放剪切处理： package action; import java.awt.Graphics; import java.awt.Image; import java.awt.Toolkit; import java.awt.image.BufferedImage; import java.awt.image.CropImageFilter; import java.awt.image.FilteredImageSource; import java.awt.image.ImageFilter; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import javax.imageio.ImageIO; import com.sun.image.codec.jpeg.JPEGCodec; import com.sun.image.codec.jpeg.JPEGImageEncoder; public class ImageProcess { /** * 对图片进行缩放 * * @param srcImgFileName * @throws IOException */ public void zoomImage(String srcImgFileName) throws IOException { // 读入文件 File _file = new File(srcImgFileName); // 构造Image对象 BufferedImage src = javax.imageio.ImageIO.read(_file); int width = src.getWidth(); int height = src.getHeight(); // 边长缩小为二分之一 BufferedImage tag = new BufferedImage(width / 2, height / 2, BufferedImage.TYPE_INT_RGB); // 绘制缩小后的图 tag.getGraphics().drawImage(src, 0, 0, width / 2, height / 2, null); FileOutputStream out = new FileOutputStream("D:test1targetIMG1-4.jpg"); JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(tag); out.close(); // 边长扩大为2倍 tag = new BufferedImage(width * 2, height * 2, BufferedImage.TYPE_INT_RGB); tag.getGraphics().drawImage(src, 0, 0, width * 2, height * 2, null); out = new FileOutputStream("D:test1targetIMGx2.jpg"); encoder = JPEGCodec.createJPEGEncoder(out); encoder.encode(tag); out.close(); } /** * 将图片分成九块 * * @param srcImageFile * @throws IOException */ public void cut(String srcImageFile) throws IOException { Image img; ImageFilter cropFilter; String dir = null; // 读取源图像 BufferedImage src = ImageIO.read(new File(srcImageFile)); int destWidth = src.getWidth() / 3; int destHeight = src.getHeight() / 3; // 循环 for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { // 四个参数分别为图像起点坐标和宽高 cropFilter = new CropImageFilter(j * destWidth, i * destHeight, destWidth, destHeight); img = Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(src.getSource(), cropFilter)); BufferedImage tag = new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB); Graphics g = tag.getGraphics(); g.drawImage(img, 0, 0, null); // 绘制小图 g.dispose(); // 输出为文件 dir = "D:test1cut_image_" + i + "_" + j + ".jpg"; File f = new File(dir); ImageIO.write(tag, "JPEG", f); } } } public static void main(String[] args) throws IOException { String imgFileName = "D:testtest.png"; ImageProcess iZoom = new ImageProcess(); iZoom.zoomImage(imgFileName); iZoom.cut(imgFileName); } }  （编辑：通化站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
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