Java 删除敏感 Exif

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.FileCopyUtils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

/**
 * @Description: Java 删除敏感 Exif
 * https://ld246.com/article/1592708224683
 * @Author apple.shan@gmail.com
 * @Date 2022/11/29
 **/
public class ExifRewriter {

    private static final Logger LOGGER = LoggerFactory.getLogger(ExifRewriter.class);

    public static byte[] removeExif(final byte[] bytes) {
        /*
        https://www.media.mit.edu/pia/Research/deepview/exif.html#ExifMarker
         */
        try {
            final byte b0 = bytes[0];
            final byte b1 = bytes[1];

            // FF D8
            if (-1 != b0 || -40 != b1) {
                // not jpeg
                return bytes;
            }

            // exif seg: FF E1
            if (-1 != bytes[2] || -31 != bytes[3]) {
                // no exif
                return bytes;
            }

            String len0 = Integer.toHexString(bytes[4]);
            if (2 > len0.length()) {
                len0 = "0" + len0;
            } else {
                len0 = len0.substring(len0.length() - 2);
            }

            String len1 = Integer.toHexString(bytes[5]);
            if (2 > len1.length()) {
                len1 = "0" + len1;
            } else {
                len1 = len1.substring(len1.length() - 2);
            }

            final String lenStr = len0 + "" + len1;
            final int len = Integer.parseInt(lenStr, 16);

            final byte[] ret = new byte[bytes.length - len - 4 - 2];
            ret[0] = -1;
            ret[1] = -40;

            System.arraycopy(bytes, 4 + len, ret, 2, ret.length - 2);
            return ret;
        } catch (final Exception e) {
            LOGGER.error("Removes Exif failed: ", e);
            return bytes;
        }
    }

    public static void main(String[] args) throws IOException {
        String testImageFilePath = "C:/Users/danxiao/Pictures/Camera Roll/GPS/test_image_file.jpg";
        File imageFile = new File(testImageFilePath);

        String testImageFile2Path = "C:/Users/danxiao/Pictures/Camera Roll/GPS/test_image_file2.jpg";
        File imageFile2 = new File(testImageFile2Path);

        //获取文件输入流
        FileInputStream contentStream = new FileInputStream(imageFile);
        byte[] content1 = IOUtils.toByteArray(contentStream);
        byte[] content2 = removeExif(content1);

        FileUtils.writeByteArrayToFile(imageFile2, content2);
    }
}