上传图片根据压缩

pom.xml

@@ -151,6 +151,14 @@
 	</dependency>
 	<!--   简体转繁体end --> 
 	
+	<!-- 图片压缩   https://www.cnblogs.com/yinjing/p/12157562.html-->
+	<dependency>
+	    <groupId>net.coobird</groupId>
+	    <artifactId>thumbnailator</artifactId>
+	    <version>0.4.20</version>
+	</dependency>
+	
+
 	</dependencies>
 
 	<build>

src/main/java/com/egolm/common/FileUtil.java

@@ -528,6 +528,12 @@ public class FileUtil {
 		return FileUtil.createFile(new File(name));
 	}
 	
+	public static void main(String[] args) {
+		String name = "d:/data/erp/excel/QY68011/";
+		createFolder(name);
+		
+	}
+
 	public static File createFile(File file) {
 		File folder = file.getParentFile();
 		if (!(folder.exists() && folder.isDirectory())) {

src/main/java/com/egolm/common/ImageUtil.java

+package com.egolm.common;
+ 
+import java.io.File;
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Set;
+ 
+
+public class ImageUtil {
+	  
+	//压缩图片
+	public static boolean compressImage(String sourceImagePath, String outputImagePath,int desFileSize) {
+		Set<String> extSet = new HashSet<String>();
+		extSet.add("jpg");
+		extSet.add("png");
+		
+		System.out.println("desFileSize----"+desFileSize);
+		String extName = FileUtil.getExtName(new File(sourceImagePath)).toLowerCase();
+		 
+		if(!extSet.contains(extName)) {
+			return false;
+		}
+		
+		byte[] images = ThumbnailsUtil.compressPicForScale(sourceImagePath, outputImagePath, desFileSize);
+		
+		if(images != null) {
+			File dFile = new File(outputImagePath);
+			if(dFile.exists()) {
+				return true;
+			}
+		}
+		return false;
+	}
+	
+	public static void main(String[] args) throws IOException {
+		float imageSizeKB = 100;
+		String sourceImagePath = "C:\\Users\\zhangyong\\Desktop\\jpg\\9.png";
+		String outputImagePath = "C:\\Users\\zhangyong\\Desktop\\jpg\\9_"+imageSizeKB+".png";
+		boolean res = compressImage(sourceImagePath, outputImagePath,50);
+		System.out.println(res);
+		
+	}
+}

src/main/java/com/egolm/common/StringUtil.java

@@ -1232,7 +1232,7 @@ public class StringUtil {
 	 
 	 
 	 public static void main(String[] args) {
-		 String original = " \"VendorName\": \"萬里行有限公司\",";
+		 String original = "采购订单收货，支持无订单快捷收货，收货后增加商铺库存。应用业务参数：：ShowCheckMsg(制单时提醒是否审核)";
 		  String result = ZhConverterUtil.toTraditional(original);
  		   System.out.println("opecc : "+result);
  		  String result1 =  ICU4JConverter(original);

src/main/java/com/egolm/common/ThumbnailsUtil.java

+package com.egolm.common;
+
+import java.awt.Graphics;
+import java.awt.GraphicsConfiguration;
+import java.awt.GraphicsDevice;
+import java.awt.GraphicsEnvironment;
+import java.awt.HeadlessException;
+import java.awt.Image;
+import java.awt.Toolkit;
+import java.awt.Transparency;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+
+import javax.swing.ImageIcon;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import net.coobird.thumbnailator.Thumbnails;
+
+//https://blog.csdn.net/hechurui/article/details/129042805
+//
+public class ThumbnailsUtil {
+	private static Logger logger = LoggerFactory.getLogger(ThumbnailsUtil.class);
+
+	//desFileSize  指定多少KB  
+	public static byte[] compressPicForScale(String filePath, String compressPath, long desFileSize) {
+		System.out.println("【图片压缩开始】");
+
+		byte[] imageBytes = new byte[0];
+		try {
+
+			imageBytes = FileUtil.fileToBytes(new File(filePath));
+
+			//判断大小，如果小于desFileSize kb，不用压缩，如果大于等于 desFileSize kb,需要压缩
+			if (imageBytes == null || imageBytes.length <= 0 || imageBytes.length < desFileSize * 1024) {
+				return imageBytes;
+			}
+			long srcSize = imageBytes.length;
+			double accuracy = getAccuracy(srcSize / 1024);
+			System.out.println("accuracy : "+accuracy);
+			// 防止压缩后图片变红
+			Image src = Toolkit.getDefaultToolkit().getImage(filePath);
+			BufferedImage image = toBufferedImage(src);
+			// 第一次压缩
+			Thumbnails.of(image).scale(accuracy).toFile(compressPath);
+			imageBytes = FileUtil.fileToBytes(new File(compressPath));
+
+			System.out.println("imageBytes length : "+imageBytes.length +"------desFileSize * 1024: "+desFileSize * 1024);
+			while (imageBytes.length > desFileSize * 1024) {
+				ByteArrayInputStream inputStream = new ByteArrayInputStream(imageBytes);
+				ByteArrayOutputStream outputStream = new ByteArrayOutputStream(imageBytes.length);
+				Thumbnails.of(inputStream).scale(accuracy).outputQuality(accuracy).toOutputStream(outputStream);
+				imageBytes = outputStream.toByteArray();
+				System.out.println("imageBytes length : "+imageBytes.length );
+			}
+			System.out.println("【图片压缩结束】 图片原大小= "+srcSize / 1024+" kb | 压缩后大小= "+imageBytes.length / 1024+" kb" );
+		} catch (Exception e) {
+			System.out.println("【图片压缩】msg=图片压缩失败!"+ e);
+		}
+		return imageBytes;
+	}
+
+	/**
+	 * 自动调节精度(经验数值)
+	 *
+	 * @param size 源图片大小
+	 * @return 图片压缩质量比
+	 */
+	private static double getAccuracy(long size) {
+		double accuracy;
+		if (size < 900) {
+			accuracy = 0.85;
+		} else if (size < 2047) {
+			accuracy = 0.6;
+		} else if (size < 3275) {
+			accuracy = 0.44;
+		} else {
+			accuracy = 0.4;
+		}
+		return accuracy;
+	}
+
+	public static BufferedImage toBufferedImage(Image image) {
+		if (image instanceof BufferedImage) {
+			return (BufferedImage) image;
+		}
+		// This code ensures that all the pixels in the image are loaded
+		image = new ImageIcon(image).getImage();
+		BufferedImage bimage = null;
+		GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
+		try {
+			int transparency = Transparency.OPAQUE;
+			GraphicsDevice gs = ge.getDefaultScreenDevice();
+			GraphicsConfiguration gc = gs.getDefaultConfiguration();
+			bimage = gc.createCompatibleImage(image.getWidth(null), image.getHeight(null), transparency);
+		} catch (HeadlessException e) {
+			// The system does not have a screen
+		}
+		if (bimage == null) {
+			// Create a buffered image using the default color model
+			int type = BufferedImage.TYPE_INT_RGB;
+			bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
+		}
+		// Copy image to buffered image
+		Graphics g = bimage.createGraphics();
+		// Paint the image onto the buffered image
+		g.drawImage(image, 0, 0, null);
+		g.dispose();
+		return bimage;
+	}
+
+	
+	public static void main(String[] args) {
+		String s = "C:\\Users\\zhangyong\\Desktop\\jpg\\2023_12_08_09_21_32_21723102_11.jpg";
+		String d = "C:\\Users\\zhangyong\\Desktop\\jpg\\2023_12_08_09_21_32_21723102_12.jpg";
+		
+		compressPicForScale(s,d,1);
+	}
+}