（word 转换为pdf） pdf 转换为图片

package coms;

import java.awt.Image;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import javax.swing.SwingUtilities;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.pdfview.PDFFile;
import com.sun.pdfview.PDFPage;

public class PdfToJpgTest {
 public static void setup() throws IOException {

  // load a pdf from a byte buffer
  File file = new File(
    "c://A.pdf");
  RandomAccessFile raf = new RandomAccessFile(file, "r");
  FileChannel channel = raf.getChannel();
  ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel
    .size());
  PDFFile pdffile = new PDFFile(buf);

  System.out.println("页数： " + pdffile.getNumPages());

  for (int i = 1; i <= pdffile.getNumPages(); i++) {
   // draw the first page to an image
   PDFPage page = pdffile.getPage(i);

   // get the width and height for the doc at the default zoom
   Rectangle rect = new Rectangle(0, 0, (int) page.getBBox()
     .getWidth(), (int) page.getBBox().getHeight());

   // generate the image
   Image img = page.getImage(rect.width, rect.height, // width &
                // height
     rect, // clip rect
     null, // null for the ImageObserver
     true, // fill background with white
     true // block until drawing is done
     );

   BufferedImage tag = new BufferedImage(rect.width, rect.height,
     BufferedImage.TYPE_INT_RGB);
   tag.getGraphics().drawImage(img, 0, 0, rect.width, rect.height,
     null);
   FileOutputStream out = new FileOutputStream(
     "c://picture//"
       + i + ".jpg"); // 输出到文件流
   JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
   encoder.encode(tag); // JPEG编码

   out.close();
  }

  // show the image in a frame
  // JFrame frame = new JFrame("PDF Test");
  // frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  // frame.add(new JLabel(new ImageIcon(img)));
  // frame.pack();
  // frame.setVisible(true);
 }

 public static void main(final String[] args) {
  SwingUtilities.invokeLater(new Runnable() {
   public void run() {
    try {
     PdfToJpgTest.setup();
    } catch (IOException ex) {
     ex.printStackTrace();
    }
   }
  });
 }

}

 

必须需要一个jar 包http://download.csdn.net/detail/klo0704/4041564