Java PDFPage类代码示例

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
@Override
public int print(Graphics g, PageFormat format, int index) throws PrinterException {
    int pagenum = index + 1;
    if ((pagenum >= 1) && (pagenum <= file.getNumPages())) {
        Graphics2D g2 = (Graphics2D) g;

        PDFPage page = file.getPage(pagenum);

        Rectangle imageArea = new Rectangle((int) format.getImageableX(), (int) format.getImageableY(),
                (int) format.getImageableWidth() , (int) format.getImageableHeight());
        g2.translate(0, 0);
        PDFRenderer pgs = new PDFRenderer(page, g2, imageArea, null, null);
        try {

            page.waitForFinish();

            pgs.run();
        } catch (InterruptedException ie) {
            System.out.println(ie.toString());
        }
        return PAGE_EXISTS;
    } else {
        return NO_SUCH_PAGE;
    }
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex)
		throws PrinterException {
	
	// Check for a page
	if(pageIndex >= pdf.getNumPages())
		return NO_SUCH_PAGE;

	// is this necessary? 
	graphics.translate(0, 0);
	
	PDFPage page = pdf.getPage(pageIndex + 1);
	PDFRenderer renderer = new PDFRenderer(page, (Graphics2D) graphics,
			getImageableRectangle(pageFormat), null, Color.white);
	
	try {
		// umm... wait for finish what? Apparently this is required and not well documented!
		page.waitForFinish();
		renderer.run();
	} catch (InterruptedException e) {
		e.printStackTrace();
	}
	
	return PAGE_EXISTS;
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
@Override
public Image toImage(byte[] input, int pageNumber) throws IOException {
	
	File file = File.createTempFile("pdf2img", "pdf");
	
	try{
		copy(input,file);
		PDFFile pdffile = toPDFFile(file);
		
        // draw a single page to an image
		PDFPage page = pdffile.getPage(pageNumber);
        
        return toImage(page,(int)page.getBBox().getWidth(),(int)page.getBBox().getHeight(),false);
      
	
	}
	finally{
		deleteEL(file);
	}
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
private static void writeImage(PDFFile pdf, int pageNumber, Resource destination,String format, int scale,
		boolean overwrite, boolean goodQuality, boolean transparent) throws PageException, IOException {
	
	PDFPage page = pdf.getPage(pageNumber);
	
	if(scale<1) throw new ExpressionException("scale ["+scale+"] should be at least 1");
	
	int width = (int)page.getBBox().getWidth();
	int height = (int)page.getBBox().getHeight();
	if(scale!=100){
		double s=(scale)/100d;
		width=	(int)((width)*s);
		height=	(int)((height)*s);
		
		
	}
	Image img=toImage(page, width, height,transparent);
	img.writeOut(destination,format, overwrite, 1f);
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
@Override
public void run() {
	Dimension size = null;
	Rectangle2D clip = null;

	if (fspp != null) {
		fspp.waitForCurrentPage();
		size = fspp.getCurSize();
		clip = fspp.getCurClip();
	} else if (page != null) {
		page.waitForCurrentPage();
		size = page.getCurSize();
		clip = page.getCurClip();
	}
	if (waitforPage == curpage) {
		PDFPage pdfPage = curFile.getPage(prepPage + 1, true);
		if (pdfPage != null && waitforPage == curpage) {
			pdfPage.getImage(size.width, size.height, clip, null, true, true);
		}
	}
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
public static Image readPDF(File f) {
	try {
		RandomAccessFile raf = new RandomAccessFile(f, "r");
		FileChannel channel = raf.getChannel();
		ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
		PDFFile pdf = new PDFFile(buf);
		PDFPage page = pdf.getPage(0);
		Rectangle rect = new Rectangle(0, 0, (int) page.getBBox().getWidth(), (int) page.getBBox().getHeight());
		Image image = page.getImage(rect.width, rect.height, rect, null, true, true);
		raf.close();
		return image;
	} catch (Exception e) {
		e.printStackTrace();
		return null;
	}
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
private void showCurrentPage() {
    this.posLabel.setText(this.currentPage + " / " + this.pdfFile.getNumPages());

    final PDFPage page = this.pdfFile.getPage(this.currentPage);

    final Rectangle2D r2d = page.getBBox();
    double width = r2d.getWidth();
    double height = r2d.getHeight();
    width /= 72.0;
    height /= 72.0;
    final int res = Toolkit.getDefaultToolkit().getScreenResolution();
    width *= res;
    height *= res;

    final Image image = page.getImage((int) width, (int) height, r2d, null, true, true);
    final ImageIcon icon = new ImageIcon(image);
    this.contentLabel.setIcon(icon);
    this.validate();

    this.contentLabel.scrollRectToVisible(
            new Rectangle(icon.getIconWidth() / 4, icon.getIconHeight() / 4, 1, 1));
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
/**
 * create the image to load
 **/
private Image getPageFromDisk(int pageNum) {
	PDFPage page = pdfFile.getPage(pageNum + 1);
	Rectangle2D r2d = page.getBBox();
	imageWidth = r2d.getWidth();
	imageHeight = r2d.getHeight();
	imageWidth /= PAGE_DIMENSION_RATIO;
	imageHeight /= PAGE_DIMENSION_RATIO;
	int res = Toolkit.getDefaultToolkit().getScreenResolution();
	imageWidth *= res;
	imageHeight *= res;
	return page.getImage((int) imageWidth, (int) imageHeight, r2d, null,
			true, true);
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
private static BufferedImage readPage(PDFFile pdf, int pageNumber) {
	double scale = 2.5; // because otherwise the image comes out really tiny
	PDFPage page = pdf.getPage(pageNumber);
	Rectangle rect = new Rectangle(0, 0, (int) page.getBBox().getWidth(), (int) page.getBBox().getHeight());
	BufferedImage bufferedImage = new BufferedImage((int)(rect.width * scale), (int)(rect.height * scale), BufferedImage.TYPE_INT_RGB);
	Image image = page.getImage((int)(rect.width * scale), (int)(rect.height * scale), rect, null, true, true);
	Graphics2D bufImageGraphics = bufferedImage.createGraphics();
	bufImageGraphics.drawImage(image, 0, 0, null);
	return bufferedImage;
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
/** Creates a new instance of PDFGlyph based on a page */
public PDFGlyph(char src, String name, PDFPage page, Point2D advance) {
    this.page = page;
    this.advance = advance;
    this.src = src;
    this.name = name;
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
/** Add commands for this glyph to a page */
public Point2D addCommands(PDFPage cmds, AffineTransform transform, int mode) {
    if (shape != null) {
        GeneralPath outline= (GeneralPath) shape.createTransformedShape(transform);
        cmds.addCommand(new PDFShapeCmd(outline, mode));
    } else if (page != null) {
        cmds.addCommands(page, transform);
    }

    return advance;
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
/**
 * Get the glyph for a given character code and name
 *
 * The preferred method of getting the glyph should be by name.  If the
 * name is null or not valid, then the character code should be used.
 * If the both the code and the name are invalid, the undefined glyph 
 * should be returned.
 *
 * Note this method must *always* return a glyph.  
 *
 * @param src the character code of this glyph
 * @param name the name of this glyph or null if unknown
 * @return a glyph for this character
 */
protected PDFGlyph getGlyph(char src, String name) {
    if (name == null) {
        throw new IllegalArgumentException("Glyph name required for Type3 font!" +
                "Source character: " + (int) src);
    }

    PDFObject pageObj = (PDFObject) charProcs.get(name);
    if (pageObj == null) {
        // glyph not found.  Return an empty glyph...
        return new PDFGlyph(src, name, new GeneralPath(), new Point2D.Float(0, 0));
    }

    try {
        PDFPage page = new PDFPage(bbox, 0);
        page.addXform(at);

        PDFParser prc = new PDFParser(page, pageObj.getStream(), rsrc);
        prc.go(true);

        float width = widths[src - firstChar];

        Point2D advance = new Point2D.Float(width, 0);
        advance = at.transform(advance, null);

        return new PDFGlyph(src, name, page, advance);
    } catch (IOException ioe) {
        // help!
        System.out.println("IOException in Type3 font: " + ioe);
        ioe.printStackTrace();
        return null;
    }
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
/**
 * Changes the displayed page.
 *
 * @param pagenum
 *            the page to display
 */
public void forceGotoPage(int pagenum) {
	if (pagenum <= 0) {
		pagenum = 0;
	} else if (pagenum >= curFile.getNumPages()) {
		pagenum = curFile.getNumPages() - 1;
	}

	curpage = pagenum;
	// update the page text field
	pageField.setText(String.valueOf(curpage + 1));
	// fetch the page and show it in the appropriate place
	PDFPage pg = curFile.getPage(pagenum + 1);
	if (fspp != null) {
		fspp.showPage(pg);
		fspp.requestFocus();
	} else {
		page.showPage(pg);
		page.requestFocus();
	}
	// update the thumb panel
	if (doThumb) {
		thumbs.pageShown(pagenum);
	}
	// stop any previous page prepper, and start a new one
	if (pagePrep != null) {
		pagePrep.quit();
	}
	pagePrep = new PagePreparer(pagenum);
	pagePrep.start();
	setEnabling();
}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
public File createCacheVersion(Document d) throws Exception {

		String docdownload = oscar.OscarProperties.getInstance().getProperty("DOCUMENT_DIR");
		File documentDir = new File(docdownload);
		File documentCacheDir = getDocumentCacheDir(docdownload);
		log.debug("Document Dir is a dir" + documentDir.isDirectory());

		File file = new File(documentDir, d.getDocfilename());

		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);
		if(raf != null) raf.close();
		if(channel != null) channel.close();
		// long readfile = System.currentTimeMillis() - start;
		// draw the first page to an image
		PDFPage ppage = pdffile.getPage(0);

		log.debug("WIDTH " + (int) ppage.getBBox().getWidth() + " height " + (int) ppage.getBBox().getHeight());

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

		log.debug("generate the image");
		Image img = ppage.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
		        );

		log.debug("about to Print to stream");
		File outfile = new File(documentCacheDir, d.getDocfilename() + ".png");

		OutputStream outs = null;
		try {
			outs = new FileOutputStream(outfile);

			RenderedImage rendImage = (RenderedImage) img;
			ImageIO.write(rendImage, "png", outs);
			outs.flush();
		} finally {
			if (outs != null) outs.close();
		}

		return outfile;

	}
 

import com.sun.pdfview.PDFPage; //导入依赖的package包/类
public ActionForward view2(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

		if(!securityInfoManager.hasPrivilege(LoggedInInfo.getLoggedInInfoFromSession(request), "_edoc", "r", null)) {
        	throw new SecurityException("missing required security object (_edoc)");
        }
		
		String doc_no = request.getParameter("doc_no");
		log.debug("Document No :" + doc_no);

		LogAction.addLog((String) request.getSession().getAttribute("user"), LogConst.READ, LogConst.CON_DOCUMENT, doc_no, request.getRemoteAddr());

		String docdownload = oscar.OscarProperties.getInstance().getProperty("DOCUMENT_DIR");
		File documentDir = new File(docdownload);
		log.debug("Document Dir is a dir" + documentDir.isDirectory());

		Document d = documentDao.getDocument(doc_no);
		log.debug("Document Name :" + d.getDocfilename());

		// TODO: Right now this assumes it's a pdf which it shouldn't

		response.setContentType("image/png");
		// response.setHeader("Content-Disposition", "attachment;filename=\"" + filename+ "\"");
		// read the file name.
		File file = new File(documentDir, d.getDocfilename());

		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);
		// long readfile = System.currentTimeMillis() - start;
		// draw the first page to an image
		PDFPage ppage = pdffile.getPage(0);

		log.debug("WIDTH " + (int) ppage.getBBox().getWidth() + " height " + (int) ppage.getBBox().getHeight());

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

		log.debug("generate the image");
		Image img = ppage.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
		        );

		log.debug("about to Print to stream");
		ServletOutputStream outs = response.getOutputStream();

		RenderedImage rendImage = (RenderedImage) img;
		ImageIO.write(rendImage, "png", outs);
		outs.flush();
		outs.close();
		return null;
	}