Question

<a class="savetopdf" href="#" onclick='

<%
    try {
        String w = result;// "<html><body> This is my Project </body></html>";
        OutputStream file = new FileOutputStream(new File("E:\\newfile.pdf"));
        Document document = new Document();
        PdfWriter.getInstance(document, file);
        document.open();
        @SuppressWarnings("deprecation")
        HTMLWorker htmlWorker = new HTMLWorker(document);
        htmlWorker.parse(new StringReader(w));
        document.close();
        file.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
%>
>Save as PDF</a>

这是我的保存为Pdf的代码目前它保存到给定目录但是我想要一旦我点击但保存为PDf然后它应该下载pdf格式的文件。

Answer 1

你不能在onclick里面编写scriptlet，你应该创建一个新的servlet来下载文件并在你的锚标签里面给它链接。

public class ServletDownloadDemo extends HttpServlet{

  private static final int BYTES_DOWNLOAD = 1024;

  public void doGet(HttpServletRequest request, 
   HttpServletResponse response) throws IOException{
    response.setContentType("application/pdf");
    response.setHeader("Content-Disposition",
                     "attachment;filename=downloadname.pdf");
    ServletContext ctx = getServletContext();
    InputStream is = ctx.getResourceAsStream("Pdf file to download");

    int read=0;
    byte[] bytes = new byte[BYTES_DOWNLOAD];
    OutputStream os = response.getOutputStream();

    while((read = is.read(bytes))!= -1){
        os.write(bytes, 0, read);
    }
    os.flush();
    os.close(); 
   }
}

Answer 2

onClick属性是普通的Javascript，当用户点击它时在浏览器上执行。您希望拥有第二个JSP或普通servlet，它只是写入HTTPServletResponse.getOutputStream（）。然后将其位置放在href元素的a属性中。

如何在Jsp中下载文件另存为Pdf

2 个答案: