Pdf文件转图片

Maven需要引入的jar如下：

<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>fontbox</artifactId>
    <version>2.0.1</version>
</dependency>
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.1</version>
</dependency>

Java代码：

public static void pdf2Image() throws Exception{
        InputStream ism = null;
        URL url = new URL("http://localhost:9001/static/test1.pdf");
        ism=url.openStream();
        PDDocument doc = PDDocument.load(ism);
        PDFRenderer renderer = new PDFRenderer(doc);
        int pageCount = doc.getNumberOfPages();//TYPE_INT_RGB
        BufferedImage newimage = new BufferedImage(2400, 65500,BufferedImage.TYPE_INT_RGB);
        Graphics2D g = newimage.createGraphics();
        g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,1f));
        for(int i=0;i<pageCount;i++){
            BufferedImage image = renderer.renderImageWithDPI(i, 300);
            g.drawImage(image, 0, (i)*image.getHeight(), image.getWidth(),image.getHeight(), null);
         }
        g.dispose();
        ImageIO.write(newimage, "JPG", new File("C:\\Users\\Administrator\\Desktop\\test.jpg"));
        ism.close();
 }