使用Thumbnailator压缩照片

水深无声 2022-11-19 04:12 256阅读 0赞

# 导入依赖 #

<dependency>
                <groupId>net.coobird</groupId>
                <artifactId>thumbnailator</artifactId>
                <version>0.4.8</version>
            </dependency>

# 代码 #

package com.asx.hyd.non.trs;
    
    
    import net.coobird.thumbnailator.Thumbnails;
    
    import javax.imageio.ImageIO;
    import java.awt.image.BufferedImage;
    import java.io.*;
    import java.util.Random;
    
    public class Test {
        public static void main(String[] args) throws FileNotFoundException, UnsupportedEncodingException {
            File file = new File("/Users/4paradigm/Desktop/11112.jpeg");
            compressImage(file);
        }
        public static InputStream compressImage(File file) {
            InputStream inputStream = null;
            try {
                FileInputStream fileInputStream = new FileInputStream(file);
                inputStream = fileInputStream;
                BufferedImage image = ImageIO.read(file);
                int width = image.getWidth();
                int height = image.getHeight();
                int newHeight = 0;
                int newWidth = 0;
                if (width > 900) {
                    newWidth = 1360;
                    newHeight = height * 1360 / width;
                    //按指定大小把图片进行缩和放（会遵循原图高宽比例）
                    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                    ImageIO.write(image, "jpg", outputStream);
                    byte[] bytes = outputStream.toByteArray();
                    ByteArrayOutputStream out = new ByteArrayOutputStream(bytes.length);
                    Thumbnails.of(inputStream).size(newWidth, newHeight).toOutputStream(out);//变为1360 * 对应比例,遵循原图比例缩放
                    byte[] b = out.toByteArray();
                    //将图片写到本地
                    BufferedOutputStream stream=null;
                    Random random = new Random(25);
                    int i = random.nextInt(1000);
                    String randomNum= String.valueOf(i);
                    String tagFileName="/Users/4paradigm/Desktop/"+File.separator+"压缩后的照片"+randomNum+"22.jpeg";
                    File fileout = new File(tagFileName);
                    FileOutputStream fileOutputStream = new FileOutputStream(fileout);
                    stream = new BufferedOutputStream(fileOutputStream);
                    stream.write(b);
                    stream.close();
                    System.out.println("----------------压缩图片尺寸后大小-------------: " + b.length/1024+"K");
                    inputStream = new ByteArrayInputStream(out.toByteArray());
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            return inputStream;
        }
    }

# Thumbnailator的简介和使用范例 #

https://www.jianshu.com/p/ad8af8214e60  
https://blog.csdn.net/qq\_34839150/article/details/109903432