利用pdfbox将pdf文档转换为图片

时间:2022-11-11 21:24:55

      如果需要在网页上预览pdf文档的话,可以将pdf转换为flash,同时也可将pdf转换为图片文件。以下为使用 pdfbox 对pdf进行转换的实例。

      需要用到的jar包:pdfbox-1.8.2.jar、fontbox-1.8.2.jar

public static void convertPdf2Image(String pdfFilePath,String imageFilePath)
throws IOException
{
File pdfFile = new File(pdfFilePath);
File imageFile = new File(imageFilePath);
File imageFileParent = new File(imageFile.getParent());
OutputStream output = null;
PDDocument pdDoc = null;
List<File> files = new ArrayList<File>();
try{
if(pdfFile.exists()){
if(!imageFileParent.exists()){
imageFileParent.mkdirs();
}
pdDoc = PDDocument.load(pdfFile);
int pageCount = pdDoc.getNumberOfPages();
List pages = pdDoc.getDocumentCatalog().getAllPages();
for(int i = 0; i < pages.size(); i++){
PDPage page = (PDPage)pages.get(i);
BufferedImage image = page.convertToImage();
Iterator iter = ImageIO.getImageWritersBySuffix("jpg");
ImageWriter writer = (ImageWriter)iter.next();
File tempFile = new File(imageFileParent.getPath(),i+imageFile.getName());
files.add(tempFile);
output = new FileOutputStream(tempFile);
ImageOutputStream imageOut = ImageIO.createImageOutputStream(output);
writer.setOutput(imageOut);
writer.write(new IIOImage(image,null,null));
output.close();
}
pdDoc.close();
mergeMultiImageFiles(files,imageFile);//合并多张图片为一张图片
}

}finally{
try{
if(pdDoc != null){
pdDoc.close();
}
if(output != null){
output.close();
}
}catch(IOException e){
e.printStackTrace();
}
}
}

其中合并多张图片为一张图片的方法请参考: mergeMultiImageFiles