将BufferedImage添加到PDFBox文档

Question

在我当前的项目中,我尝试添加BufferedImage一个PDFBox文档.更具体地说,我使用的是图像JFreeChart.我的代码看起来像这样:

public void exportToPDF(JFreeChart chart, String filePath){
    PDDocument doc = null;
    PDPage page = null;
    PDXObjectImage ximage = null;

    try {
        doc = new PDDocument();
        page = new PDPage();
        doc.addPage(page);
        PDPageContentStream content = new PDPageContentStream(doc, page);
        BufferedImage image = chart.createBufferedImage(300, 300);
        ximage = new PDJpeg(doc, image);
        content.drawImage(ximage, 20, 20);
        content.close();
    } catch(IOException ie) {
    }
    doc.save(filePath);
    doc.close();
}

文档被创建; 我可以添加文本,但是我收到错误,指出图像没有足够的信息显示.

我有什么不对的任何线索？

Answer 1

谢谢你帮我搞垃圾桶.昨天晚上花了几个小时,今天花了很多关于PipedIn/OutStreams的事情.无法弄清楚.但是,我得到了它的工作.事实证明,这根本不是很困难.

public void exportToPDF(JFreeChart chart, String filePath){
    PDDocument doc = null;
    PDPage page = null;
    PDXObjectImage ximage = null;
    try {
        doc = new PDDocument();
        page = new PDPage();
        doc.addPage(page);
        PDPageContentStream content = new PDPageContentStream(doc, page);

        //create a new outStream
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ChartUtilities.writeChartAsJPEG(out, chart, 300, 300);//write to outstream
        //create a new inputstream
        InputStream in = new ByteArrayInputStream(out.toByteArray());
        ximage = new PDJpeg(doc, in);
        content.drawImage(ximage, 5, 300);
        content.close();
    }
    catch (IOException ie){
        //handle exception
    }
    //save and close
    doc.save(filePath);
    doc.close();
}

我相信这可以做得更好但是有效.

Answer 2

有一种简单的方法可以使用pdfbox将JFreeChart插入到pdf中:

BufferedImage bufferedImage = source.getChart().createBufferedImage(source.getWidth(),
        source.getHeight(), BufferedImage.TYPE_INT_RGB, null);
PDXObjectImage ximage = new PDJpeg(doc, bufferedImage);

没有任何流;)