修改航线文件重命名报错，增加图片缩略图，完善喊话功能

rain

2024-07-15 e567c76939c6516b4146aa6a554d95c0bcb4f078

 src/main/java/com/dji/sample/territory/utils/ImgZipUtil.java

@@ -5,6 +5,7 @@
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
import javax.imageio.stream.MemoryCacheImageOutputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.nio.file.Files;
@@ -14,29 +15,43 @@
    /**
     * 图片压缩
     *
     * @param originalImageFile
     * @param compressionQuality 图片压缩质量 0-1
     * @return
     * @throws IOException
     */
    public static File compressImageAndGetFile(File originalImageFile, float compressionQuality) throws IOException {
        BufferedImage originalImage = ImageIO.read(originalImageFile);
        try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
            ImageWriter writer = ImageIO.getImageWritersByFormatName("jpg").next();
            try (ImageOutputStream ios = new MemoryCacheImageOutputStream(baos)) {
                writer.setOutput(ios);
                ImageWriteParam param = writer.getDefaultWriteParam();
                param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
                param.setCompressionQuality(compressionQuality);
                writer.write(null, new javax.imageio.IIOImage(originalImage, null, null), param);
            } finally {
                writer.dispose();
            }
            InputStream in = new ByteArrayInputStream(baos.toByteArray());
            File tempFile = File.createTempFile("compressed-", ".jpg");
            tempFile.deleteOnExit();
            Files.copy(in, tempFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
            return tempFile;
    public static File compressImage(File inputFile, int targetSizeKB) throws IOException {
        BufferedImage image = ImageIO.read(inputFile);

        // 计算目标图片的尺寸
        long targetSizeBytes = targetSizeKB * 1024;
        long originalSizeBytes = getImageSize(image);
        double compressionRatio = (double) targetSizeBytes / originalSizeBytes;
        int targetWidth = (int) (image.getWidth() * Math.sqrt(compressionRatio));
        int targetHeight = (int) (image.getHeight() * Math.sqrt(compressionRatio));

        // 使用ImageIO进行压缩
        BufferedImage compressedImage = new BufferedImage(targetWidth, targetHeight, BufferedImage.TYPE_INT_RGB);
        Graphics2D graphics = compressedImage.createGraphics();
        graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        graphics.drawImage(image, 0, 0, targetWidth, targetHeight, null);
        graphics.dispose();

        // 将压缩后的图片写入输出文件
        File outputFile = new File(inputFile.getParent(), "compressed_" + inputFile.getName());
        ImageIO.write(compressedImage, "jpeg", outputFile);
        return outputFile;
    }

    public static long getImageSize(BufferedImage image) {
        File tempFile;
        try {
            tempFile = File.createTempFile("temp", ".tmp");
            ImageIO.write(image, "jpg", tempFile);
            long size = tempFile.length();
            tempFile.delete();
            return size;
        } catch (IOException ex) {
            ex.printStackTrace();
            return 0;
        }
    }
}