从PNG图像或Java面板创建PDF [英] Create PDF from a PNG image Or Java Panel

问题描述

我正在寻找一个可以拍摄图像（PNG）并创建PDF的Java库。
或直接从已绘制的java面板创建PDF。

I'm looking for a Java library that will can take a Image (PNG) and create a PDF. Or Create the PDF directly from a java panel that has been drawn.

推荐答案

您可以使用Gnostice实现此目的PDFOne for Java（ http://www.gnostice.com/PDFOne_Java.asp ）。

You can achieve this using Gnostice PDFOne for Java (http://www.gnostice.com/PDFOne_Java.asp).

在下面找到从PNG图像创建PDF文档的代码片段。

Find below the code snippet that creates a PDF document from a PNG image.

PdfDocument doc = new PdfDocument();

// Read the image as BufferedImage object
BufferedImage bufImg = ImageIO.read(new File(
    "SampleImage.PNG"));

// Create PdfImage object using the above BufferedImage object
PdfImage img = PdfImage.create(bufImg);

// Create a PdfPage of image size (image width x image Height)
PdfPage page1 = new PdfPage(img.width(), img.height());

// draw the image at 0, 0
page1.drawImage(img, 0, 0);

// add the page to the document object
doc.add(page1);

// save the document to the output file
doc.save("PNGImageToPDF.pdf");
doc.close();

要从JPanel创建BufferedImage，您可以使用以下代码段。

To create a BufferedImage from a JPanel you can use the below code snippet.

int w = jpanel.getWidth();
int h = jpanel.getHeight();
BufferedImage bi = new BufferedImage(w, h,
    BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
jpanel.paint(g2);
g2.dispose();

从JPanel创建BuffereImage后，您可以使用第一个代码片段来创建PDF。

After creating BuffereImage from JPanel you can use the first code snippet to create PDF.

我希望你会觉得这很有用。

I hope you will find this useful.

免责声明：我为Gnostice工作。

Disclaimer: I work for Gnostice.

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