Java使用Tinify实现图片无损压缩(4M无损压缩到1M)的方法

byte[] sourceData = Files.readAllBytes(Paths.get("unoptimized.jpg"));
byte[] resultData = Tinify.fromBuffer(sourceData).toBuffer();

Source source = Tinify.fromUrl("https://cdn.tinypng.com/images/panda-happy.png");
source.toFile("optimized.jpg");

<!-- Tinify -->
<dependency>
    <groupId>com.tinify</groupId>
    <artifactId>tinify</artifactId>
    <version>RELEASE</version>
</dependency>

<!-- 阿里云OSS -->
<dependency>
    <groupId>com.aliyun.oss</groupId>
    <artifactId>aliyun-sdk-oss</artifactId>
<!-- 阿里云OSS -->
<dependency>
    <groupId>com.aliyun.oss</groupId>
    <artifactId>aliyun-sdk-oss</artifactId>
    <version>3.14.1</version>
</dependency>

public class TinifyConfig {
    public static final String API_KEY = "your_tinify_api_key";
}

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.tinify.Tinify;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.UUID;

public class ImageUploader {

    private static final String dir = "your_upload_directory/";

    /**
     * 图片上传
     *
     * @param file 源文件
     * @return 压缩后图片的URL
     * @throws IOException
     */
    public String upload(MultipartFile file) {
        String endpoint = OSSClientConstants.endpointMap.get("lden");
        OSS ossClient = new OSSClientBuilder().build(endpoint, OSSClientConstants.ACCESS_KEY_ID, OSSClientConstants.ACCESS_KEY_SECRET);
        try {
            String name = file.getOriginalFilename();
            String prefix = name.substring(name.lastIndexOf("."));  // 获取文件后缀
            String filename = dir + UUID.randomUUID() + prefix;  // 上传的文件路径和文件名

            // 压缩图片
            InputStream is = compressPic(file);
            
            // 上传阿里OSS
            ossClient.putObject(bucket, filename, is);
            
             // 返回图片上传URL
            return ("https://your_cdn/" + filename);
        } catch (Exception e) {
            logger.error("上传发生错误", e);
            return null;
        } finally {
            ossClient.shutdown();
        }
    }

    /**
     * Tinify压缩图片
     *
     * @param file 源文件
     * @return 压缩图片流
     * @throws IOException
     */
    public InputStream compressPic(MultipartFile file) throws IOException {
        InputStream is = file.getInputStream();
        // 小于 500kb不压缩，这块业务可以自己决定
        if (file.getSize() > 500 * 1024) {
            //  设置Tinify的API密钥
            Tinify.setKey(TinifyConfig.API_KEY);
            // 从MultipartFile创建Tinify的Source对象,压缩图片
            Source source = Tinify.fromBuffer(file.getBytes());
            // 压缩之后保存到服务器
            source.toFile(file.getOriginalFilename());
            // 读取服务器中压缩图片输入流
            byte[] bytes = Files.readAllBytes(Paths.get(file.getOriginalFilename()));
            is = convertToMultipartFile(bytes, file.getOriginalFilename()).getInputStream();
            // 删除压缩源文件
            Files.deleteIfExists(Paths.get(file.getOriginalFilename()));
        }
        return is;
    }
}