public static void ImagesToPdf(){
String folderPath = "D:\\Desktop\\xuanku";
File folder = new File(folderPath);
List<String> images = new ArrayList<>();
if (folder.exists() && folder.isDirectory()) {
File[] listOfFiles = folder.listFiles();
for (File file : listOfFiles) {
if (file.isFile() && file.getName().endsWith(".png") || file.getName().endsWith(".PNG")) {
images.add(file.getAbsolutePath());
}
}
} else {
System.out.println("文件夹不存在或不是一个目录");
return;
}
Collections.sort(images, new Comparator<String>() {
@Override
public int compare(String s1, String s2) {
String num1 = s1.replaceAll("\\D+", "");
String num2 = s2.replaceAll("\\D+", "");
return Integer.compare(Integer.parseInt(num1), Integer.parseInt(num2));
}
});
com.aspose.pdf.Document pdfDoc = new com.aspose.pdf.Document();
for (String imagePath: images) {
try {
com.aspose.pdf.Page page = pdfDoc.getPages().add();
page.setPageSize(com.aspose.pdf.PageSize.getA4().getWidth(), com.aspose.pdf.PageSize.getA4().getHeight());
BufferedImage image = ImageIO.read(new File(imagePath));
float imageWidth = image.getWidth();
float imageHeight = image.getHeight();
float scaleWidth = com.aspose.pdf.PageSize.getA4().getWidth() / imageWidth;
float scaleHeight = com.aspose.pdf.PageSize.getA4().getHeight() / imageHeight;
float scaleFactor = Math.min(scaleWidth, scaleHeight);
com.aspose.pdf.Image pdfImage = new com.aspose.pdf.Image();
pdfImage.setFile(imagePath);
pdfImage.setImageScale(scaleFactor);
page.getParagraphs().add(pdfImage);
} catch (Exception e) {
e.printStackTrace();
}
}
try {
pdfDoc.save("D:\\Desktop\\xuanku\\output2.pdf");
System.out.println("PDF文件已保存。");
} catch (Exception e) {
e.printStackTrace();
}
}