java实现PDF转图片的方法

   
  org.apache.pdfbox   
  fontbox   
  2.0.1 
 
  
  org.apache.pdfbox  
  pdfbox 
  2.0.1 

public class PDFToImgUtil {
 
 private static Logger logger = LoggerFactory.getLogger(PDFToImgUtil.class);
 
 
 /**
 * 获取PDF总页数
 * @throws IOException 
 */
 public static int getPDFNum(String fileUrl) throws IOException {
 PDDocument pdDocument = null;
 int pages = 0;
 try {
  pdDocument = getPDDocument(fileUrl);
  pages = pdDocument.getNumberOfPages();
 } catch (Exception e) {
  e.printStackTrace();
   logger.error(e.getMessage(),e);
 } finally {
  if (pdDocument != null) {
  pdDocument.close();
  }
 }
 return pages;
 }
 
 
 /**
 * PDF转图片 根据页码一页一页转 
 * @throws IOException 
 * imgType:转换后的图片类型 jpg,png
 */
 public static void PDFToImg(OutputStream sos,String fileUrl,int page,String imgType) throws IOException {
 PDDocument pdDocument = null;
 /* dpi越大转换后越清晰，相对转换速度越慢 */
 int dpi = 100;
 try {
  pdDocument = getPDDocument(fileUrl);
  PDFRenderer renderer = new PDFRenderer(pdDocument);
  int pages = pdDocument.getNumberOfPages();
  if (page <= pages && page > 0) {
  BufferedImage image = renderer.renderImageWithDPI(page,dpi);
  ImageIO.write(image, imgType, sos);
  }
 } catch (Exception e) {
  e.printStackTrace();
   logger.error(e.getMessage(),e);
 } finally {
  if (pdDocument != null) {
  pdDocument.close();
  }
 }
 
 }
 
 
 private static PDDocument getPDDocument(String fileUrl) throws IOException {
 File file = new File(fileUrl);
 FileInputStream inputStream = new FileInputStream(file);
   return PDDocument.load(inputStream);
 }
 
}