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@@ -1,21 +1,35 @@
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package org.springblade.common.utils;
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import cn.hutool.core.io.FileUtil;
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+import com.drew.imaging.ImageMetadataReader;
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+import com.drew.imaging.ImageProcessingException;
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+import com.drew.metadata.Metadata;
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+import com.drew.metadata.exif.ExifIFD0Directory;
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import org.apache.commons.lang.StringUtils;
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import org.springframework.util.CollectionUtils;
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+import javax.imageio.IIOImage;
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+import javax.imageio.ImageIO;
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+import javax.imageio.ImageWriteParam;
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+import javax.imageio.ImageWriter;
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+import java.awt.*;
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+import java.awt.geom.AffineTransform;
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+import java.awt.image.AffineTransformOp;
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+import java.awt.image.BufferedImage;
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import java.io.*;
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import java.math.BigDecimal;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.net.URLConnection;
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import java.util.*;
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+import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipOutputStream;
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+import com.drew.metadata.MetadataException;
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/**
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* 通用工具类
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@@ -322,4 +336,92 @@ public class CommonUtil {
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}
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+
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+
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+ /**
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+ * 图片缩放、压缩、旋转处理
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+ * @param imageData
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+ * @return
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+ * @throws IOException
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+ * @throws ImageProcessingException
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+ * @throws MetadataException
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+ */
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+ public static byte[] compressImage(byte[] imageData) throws IOException, ImageProcessingException, MetadataException {
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+ // 读取原始图像（处理旋转问题）
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+ Metadata metadata = ImageMetadataReader.readMetadata(new ByteArrayInputStream(imageData));
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+ if (metadata.containsDirectoryOfType(ExifIFD0Directory.class)) {
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+ ExifIFD0Directory exifIFD0Directory = metadata.getFirstDirectoryOfType(ExifIFD0Directory.class);
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+ if (exifIFD0Directory.containsTag(ExifIFD0Directory.TAG_ORIENTATION)) {
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+ // 获取 Orientation 标签的值
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+ int orientation = exifIFD0Directory.getInt(ExifIFD0Directory.TAG_ORIENTATION);
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+ // 需要旋转图片
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+ BufferedImage originalImage = ImageIO.read(new ByteArrayInputStream(imageData));
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+ AffineTransform transform = new AffineTransform();
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+ if (orientation == 6) {
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+ transform.rotate(Math.PI / 2, originalImage.getWidth() / 2, originalImage.getHeight() / 2);
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+ } else if (orientation == 8) {
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+ transform.rotate(-Math.PI / 2, originalImage.getWidth() / 2, originalImage.getHeight() / 2);
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+ }
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+ AffineTransformOp op = new AffineTransformOp(transform, AffineTransformOp.TYPE_BILINEAR);
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+ originalImage = op.filter(originalImage, null);
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+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
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+ ImageIO.write(originalImage, "jpg", baos);
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+ imageData = baos.toByteArray();
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+ }
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+ }
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+
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+ // 缩放图像
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+ String formatName = "JPEG";
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+ ByteArrayInputStream bais = new ByteArrayInputStream(imageData);
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+ BufferedImage originalImage = ImageIO.read(bais);
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+ long sizeLimit = 366912; //358KB
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+ int width = 768;
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+ int height = 1024;
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+ Image scaledImage = originalImage.getScaledInstance(width, height, Image.SCALE_SMOOTH);
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+ BufferedImage resizedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
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+ resizedImage.getGraphics().drawImage(scaledImage, 0, 0, null);
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+
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+ // 压缩图像
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+ ByteArrayOutputStream baos = new ByteArrayOutputStream();
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+ ImageIO.write(resizedImage, formatName, baos);
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+
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+ if (baos.size() <= sizeLimit) {
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+ // 图片大小已经小于等于目标大小，直接返回原始数据
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+ return baos.toByteArray();
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+ }
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+
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+ float quality = 0.9f; // 初始化压缩质量
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+ int retries = 10; // 最多尝试 10 次
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+
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+ while (baos.size() > sizeLimit && retries > 0) {
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+ // 压缩图像并重新计算压缩质量
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+ byte[] data = baos.toByteArray();
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+ bais = new ByteArrayInputStream(data);
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+ BufferedImage compressedImage = ImageIO.read(bais);
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+ baos.reset();
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+
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+ ImageWriter writer = null;
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+ Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(formatName);
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+ if (writers.hasNext()) {
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+ writer = writers.next();
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+ } else {
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+ throw new IllegalArgumentException("Unsupported image format: " + formatName);
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+ }
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+
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+ ImageWriteParam writeParam = writer.getDefaultWriteParam();
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+ writeParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
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+ writeParam.setCompressionQuality(quality);
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+
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+ writer.setOutput(ImageIO.createImageOutputStream(baos));
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+ writer.write(null, new IIOImage(compressedImage, null, null), writeParam);
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+ writer.dispose();
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+
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+ float ratio = sizeLimit * 1.0f / baos.size();
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+ quality *= Math.sqrt(ratio);
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+ retries--;
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+ }
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+
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+ return baos.toByteArray();
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+ }
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+
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}
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qianxb