//通過url下載pdf文件到本地返回File文件

public static File getFile(String url) throws Exception {//對本地文件命名String fileName = url.substring(url.lastIndexOf("."), url.length());File file = null;URL urlfile;InputStream inStream = null;OutputStream os = null;try {file = File.createTempFile("net_url", fileName);//下載urlfile = new URL(url);inStream = urlfile.openStream();os = new FileOutputStream(file);int bytesRead = 0;byte[] buffer = new byte[8192];while ((bytesRead = inStream.read(buffer, 0, 8192)) != -1) {os.write(buffer, 0, bytesRead);}} catch (Exception e) {e.printStackTrace();} finally {try {if (null != os) {os.close();}if (null != inStream) {inStream.close();}} catch (Exception e) {e.printStackTrace();}}return file; }

//傳入本地文件地址實現pdf轉換為jpg，輸出pdf（可視需求自行更新方法）

public static List<String> pdfToPicture(String filePath, HttpServletRequest request) throws IOException {List<String> list = new ArrayList();String fileDirectory = filePath.substring(0, filePath.lastIndexOf("."));String imagePath = "";File file = new File(filePath);try {File f = new File(fileDirectory);if (!f.exists()) {f.mkdir();}PDDocument doc = PDDocument.load(file);PDFRenderer renderer = new PDFRenderer(doc);int pageCount = doc.getNumberOfPages();for(int i = 0; i < pageCount; ++i) {BufferedImage image = renderer.renderImage(i, 2.5F);imagePath = fileDirectory + "/" + i + ".jpg";ImageIO.write(image, "PNG", new File(imagePath));list.add(imagePath);System.out.println(imagePath);}doc.close();return list;} catch (IOException var12) {var12.printStackTrace();return new ArrayList<>();} }

總結

以上是生活随笔為你收集整理的分享一个通过网络链接PDF转JPG的公用方法的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。