我目前正在將應用程序從JDK 1.5.0_06遷移到1.8.0_66。在應用程序中,有多個使用com.sun.image.codec.jpeg類的文件。當我嘗試創建JAR時,出現以下錯誤。從JDK 1.5.0_06遷移到1.8.0_66 - 替換棄用的Java JPEG類
error: package com.sun.image.codec.jpeg does not exist import com.sun.image.codec.jpeg.*;
我參考了博客Replacing the deprecated Java JPEG classes for Java 7,我的錯誤已被清除。但現在我得到以下警告:
warning: JPEGImageWriter is internal proprietary API and may be removed in a future release import com.sun.imageio.plugins.jpeg.JPEGImageWriter;
從博客有問題的代碼:
public static void saveAsJPEG(String jpgFlag, BufferedImage image_to_save, float JPEGcompression, FileOutputStream fos) throws IOException {
// Image writer
JPEGImageWriter imageWriter = (JPEGImageWriter) ImageIO.getImageWritersBySuffix("jpeg").next();
ImageOutputStream ios = ImageIO.createImageOutputStream(fos);
imageWriter.setOutput(ios);
//and metadata
IIOMetadata imageMetaData = imageWriter.getDefaultImageMetadata(new ImageTypeSpecifier(image_to_save), null);
if (jpgFlag != null) {
int dpi = 96;
try {
dpi = Integer.parseInt(jpgFlag);
}
catch (Exception e) {
e.printStackTrace();
}
//new metadata
Element tree = (Element) imageMetaData.getAsTree("javax_imageio_jpeg_image_1.0");
Element jfif = (Element) tree.getElementsByTagName("app0JFIF").item(0);
jfif.setAttribute("Xdensity", Integer.toString(dpi));
jfif.setAttribute("Ydensity", Integer.toString(dpi));
}
if (JPEGcompression >= 0 && JPEGcompression <= 1f) {
// new Compression
JPEGImageWriteParam jpegParams = (JPEGImageWriteParam) imageWriter.getDefaultWriteParam();
jpegParams.setCompressionMode(JPEGImageWriteParam.MODE_EXPLICIT);
jpegParams.setCompressionQuality(JPEGcompression);
}
//new Write and clean up
imageWriter.write(imageMetaData, new IIOImage(image_to_save, null, null), null);
ios.close();
imageWriter.dispose();
}
由於您不應該使用內部API,因此您會收到警告 - 但這只是一個警告,您可以編譯並運行代碼。 – assylias