package effective.java;
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.JPEGEncodeParam;
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("D:\\workspace\\word2pdf\\src\\tests.doc.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());
String getPdfFilePath = System.getProperty("user.dir") + "\\pdfPicFile";
System.out.println("getPdfFilePath is :" + getPdfFilePath);
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);
// 输出到文件流
FileOutputStream out = new FileOutputStream(getPdfFilePath + "\\"
+ i + ".jpg");
System.out.println("成功保存图片到:" + getPdfFilePath + "\\" + i + ".jpg");
/*
* JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
* encoder.encode(tag); // JPEG编码 out.close();
*/
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param2 = encoder.getDefaultJPEGEncodeParam(tag);
param2.setQuality(1f, false);// 1f是提高生成的图片质量
encoder.setJPEGEncodeParam(param2);
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();
}
}
});
}
}
依赖的jar包
PDFRenderer.jar