使用速度模板生成的pdf中的书签

时间:2019-05-28 10:51:38

标签: java itext velocity

我有大量数据,这些数据将用于使用速度模板生成PDF。我有使用表的.vm文件生成的索引页。我应该提供从索引页面到其他页面的书签。

我尝试仅在HTML中使用href。

index.vm:

<table>
<tr>
<td>
1
</td>
<td>
<a href="#go">chapter1</a>
<td>
</tr>
</table>

assembly.vm:

<table>
<tr>
<p1 id="go">assembly1</p>
</tr>
</table>

应该在索引页面中具有链接,然后单击该链接,转到相应的内容页面。

2 个答案:

答案 0 :(得分:0)

从模板生成PDF时,我遇到了同样的问题,但是我使用的是JSP。每个模板引擎的逻辑都是相同的。

要实现此目的,请在您自己的服务器上请求从HTML模板中获取生成的内容,然后使用flying-saucer将其转换为PDF。

enter image description here

所以基本上你会拥有

一个servlet根据参数返回您生成的Velocity模板

(即:http://127.0.0.1/getgeneratedpdf

    dopost etc. ...

另一个servlet调用具有所需参数的第一个servlet来获取HTML中生成的内容

   URLConnection connection = new URL(urlOfTheServletAbove).openConnection();
   connection.setDoOutput(true); // POST
   connection.setRequestProperty("Accept-Charset", "UTF-8");
   connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
   try (OutputStream output = connection.getOutputStream()) {
       // parameters is encoded query string
       output.write(parameters.getBytes(StandardCharsets.UTF_8));
   }
   BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
   StringBuilder sb = new StringBuilder();
   String inputLine;
   while ((inputLine = in.readLine()) != null) { sb.append(inputLine); }
   in.close();

基于飞碟的PDF构建器

import org.xhtmlrenderer.pdf.ITextRenderer;
// ...
private static final String TMP_DIR = System.getProperty("java.io.tmpdir");
// ...
File tempPdf = new File(TMP_DIR+tempPdfName);
if (!tempPdf.exists()) { tempPdf.createNewFile(); }
FileOutputStream fos = new FileOutputStream(tempPdf);
new ITextRenderer() {{
    setDocumentFromString(sb.toString());
    layout();
    createPDF(fos);
}};
fos.close();
// ...

然后将PDF写入响应

void writePDFContentToResponse(File pdf, HttpServletResponse response) throws IOException {
    InputStream fis = new FileInputStream(pdf);
    String mimeType = getServlet().getServletContext().getMimeType(pdf.getAbsolutePath());
    response.setContentType(mimeType != null ? mimeType : "application/octet-stream");
    response.setContentLength((int) pdf.length());
    response.setHeader("Content-Disposition", "attachment; filename=yourPDFName.pdf"); // or +pdf.getName();
    ServletOutputStream os = response.getOutputStream();
    byte[] bufferData = new byte[1024];
    int read = 0;
    while((read = fis.read(bufferData)) != -1) { os.write(bufferData, 0, read); }
    os.flush();
    os.close();
    fis.close();
    response.flushBuffer();
    Files.delete(pdf.toPath());
}

答案 1 :(得分:0)

一旦使用itext和.vm文件生成了pdf, 生成时,将带有页码的描述存储在地图中,这是使用以下代码实现的

HashMap<String, Object> map = new HashMap<String, Object>();
    map.put("Title", "INDEX");
    map.put("Action", "GoTo");
    map.put("Page", String.format("%d Fit", 8));
    ArrayList<HashMap<String, Object>> kids = new ArrayList<HashMap<String,Object>>();

    for(BookMark book : BookMarks) {
        HashMap<String, Object> kid = new HashMap<String, Object>();
        kid.put("Title", book.getDescription());
        kid.put("Action", "GoTo");
        kid.put("Page", String.format("%d Fit", book.getPageNumber()));

        ArrayList<HashMap<String, Object>> leafs = new ArrayList<HashMap<String,Object>>();
        for(BookMark books : book.getLeaf()) {
            HashMap<String, Object> leaf = new HashMap<String, Object>();
            leaf.put("Title", books.getDescription());
            leaf.put("Action", "GoTo");
            leaf.put("Page", String.format("%d Fit", books.getPageNumber()));
            leafs.add(leaf);
        }
        kid.put("Kids", leafs);
        kids.add(kid);
    }

    map.put("Kids", kids);
    ArrayList<HashMap<String, Object>> outlines = new ArrayList<HashMap<String,Object>>();
    outlines.add(map);
    PdfReader reader = new PdfReader(env.getProperty("path.generated.pdf").concat(fileName));
    PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(env.getProperty("path.generated.pdf").concat(catalogInfo.getCatalogName().trim().concat("raw1")).concat(".pdf")));
    stamper.setOutlines(outlines);
    stamper.setFullCompression();
    stamper.close();
    reader.close();
    File file = new File(env.getProperty("path.generated.pdf").concat(fileName)); 
    file.delete();