Java pdf转图片

1. 导入依赖

<dependency>
   <groupId>org.apache.pdfboxgroupId>
    <artifactId>pdfboxartifactId>
    <version>2.0.26version>
dependency>
<dependency>
    <groupId>com.lowagiegroupId>
    <artifactId>itextartifactId>
    <version>4.2.2version>
dependency>
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2. 代码

public static List<InputStream> pdf2Image(InputStream inputStream) {

        //定义集合保存返回图片数据
        List<InputStream> resultList = new ArrayList<>();

        String fileName = "E:\\"+DateUtil.today()+ IdUtil.randomUUID() +".pdf";
        PDDocument pdDocument = null;
        PdfReader reader = null;
        try {

            FileUtil.writeFromStream(inputStream,new File(fileName),false);
            pdDocument = PDDocument.load(new File(fileName));


            PDFRenderer renderer = new PDFRenderer(pdDocument);

            reader = new PdfReader(fileName);
            int pages = reader.getNumberOfPages();
            log.info("pdf总共多少页-----" + pages);

            for (int i = 0; i < pages; i++) {

                BufferedImage image = renderer.renderImageWithDPI(i, 150);

                ByteArrayOutputStream bos = new ByteArrayOutputStream();
                ImageIO.write(image, "png", bos);

                resultList.add(new ByteArrayInputStream(bos.toByteArray()));
                IoUtil.close(bos);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            reader.close();
            IoUtil.close(pdDocument);
            IoUtil.close(inputStream);
            FileUtil.del(fileName);
        }
        return resultList;
    }
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