使用Java将PDF文件转成图片
import com.sun.pdfview.PDFFile; import com.sun.pdfview.PDFPage; import javax.imageio.ImageIO; import javax.swing.*; import java.awt.*; 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; /** * Created by David on 2016/11/15. */ public class Pdf2Pic { /** * 根据pdf文件拆分图片 * @param ossKey * @param file * @return * @throws IOException */ public static String splitPic(String ossKey,File file) throws IOException { // load a pdf from a byte buffer 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 = CheckResultConstances.PATH_PDF_PIC+ossKey; //目录不存在,则创建目录 File p=new File(getPdfFilePath); if(!p.exists()){ p.mkdir(); } 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); String dstName=getPdfFilePath+File.separator + i + ".jpg"; FileOutputStream out = new FileOutputStream(dstName); // 输出到文件流 System.out.println("成功保存图片到 : " +getPdfFilePath+File.separator + i + ".jpg"); // // JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); // encoder.encode(tag); // JPEG编码 String formatName = dstName.substring(dstName.lastIndexOf(".") + 1); //FileOutputStream out = new FileOutputStream(dstName); //JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out); //encoder.encode(dstImage); ImageIO.write(tag, /*"GIF"*/ formatName /* format desired */ , new File(dstName) /* target */ ); out.close(); } return getPdfFilePath; // 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 { File file = new File("/Users/David/Downloads/test.pdf"); new Pdf2Pic().splitPic("123",file); } catch (IOException ex) { ex.printStackTrace(); } } }); } }
pom.xml依赖配置(将附件中的该jar包上传到nexus内部仓库):
<dependency> <groupId>com.sun.pdfview</groupId> <artifactId>pdfrenderer</artifactId> <version>0.9.0</version> </dependency>
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