使用 xhtmlrenderer (iText) 的书签

发布于 2024-09-09 12:24:59 字数 100 浏览 3 评论 0原文

我使用 xhtmlrenderer（也称为 Flying Saucer）和 iText 将 HTML 转换为 PDF。我如何用它创建书签？有人有一个小例子吗？

提前致谢。

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っ左 2024-09-16 12:25:06

上述方法有效是正确的。

为书签演示修改的 Flyingsaucer-R8-src 示例

public class PDFRenderToMultiplePages {
    public static void main(String[] args) throws Exception {
        OutputStream os = null;
        try {
            final String[] inputs = new String[] { newPageHtml(1, "red"),
                    newPageHtml(2, "blue"), newPageHtml(3, "green") };
            final File outputFile = File.createTempFile("FlyingSacuer", ".pdf");
            os = new FileOutputStream(outputFile);
            ITextRenderer renderer = new ITextRenderer();
            renderer.setDocumentFromString(inputs[0]);
            renderer.layout();
            renderer.createPDF(os, false);
            BlockBox rootBox = renderer.getRootBox();
            for (int i = 1; i < inputs.length; i++) {
                renderer.setDocumentFromString(inputs[i]);
                renderer.layout();
                renderer.writeNextDocument();
            }
            renderer.finishPDF();
            System.out.println("Sample file with " + inputs.length
                    + " documents rendered as PDF to " + outputFile);
        } finally {
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) { /* ignore */
                }
            }
        }
    }

    private static String newPageHtml(int pageNo, String color) {
        return "<html><head><bookmarks>"
                + "<bookmark name=\"bookmark"
                + pageNo
                + "\" href=\"#bookMark\"/></bookmarks></head>"
                + "<body><div style=\"color:"
                + color
                + ""
                + ";\"><a name=\"bookMark\">Book Mark Example</a></div></body></html>";
    }
}

Its correct that above approach will work.

Sample example from flyingsaucer-R8-src modified for BookMarks Demonstration

public class PDFRenderToMultiplePages {
    public static void main(String[] args) throws Exception {
        OutputStream os = null;
        try {
            final String[] inputs = new String[] { newPageHtml(1, "red"),
                    newPageHtml(2, "blue"), newPageHtml(3, "green") };
            final File outputFile = File.createTempFile("FlyingSacuer", ".pdf");
            os = new FileOutputStream(outputFile);
            ITextRenderer renderer = new ITextRenderer();
            renderer.setDocumentFromString(inputs[0]);
            renderer.layout();
            renderer.createPDF(os, false);
            BlockBox rootBox = renderer.getRootBox();
            for (int i = 1; i < inputs.length; i++) {
                renderer.setDocumentFromString(inputs[i]);
                renderer.layout();
                renderer.writeNextDocument();
            }
            renderer.finishPDF();
            System.out.println("Sample file with " + inputs.length
                    + " documents rendered as PDF to " + outputFile);
        } finally {
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) { /* ignore */
                }
            }
        }
    }

    private static String newPageHtml(int pageNo, String color) {
        return "<html><head><bookmarks>"
                + "<bookmark name=\"bookmark"
                + pageNo
                + "\" href=\"#bookMark\"/></bookmarks></head>"
                + "<body><div style=\"color:"
                + color
                + ""
                + ";\"><a name=\"bookMark\">Book Mark Example</a></div></body></html>";
    }
}

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安静被遗忘 2024-09-16 12:25:04

R6中似乎添加了书签，但用户指南仅提供了一个临时参考。向作者提供 TODO 以便稍后添加示例。

搜索论坛，我发现这个例子：

<html> 
<head>  
<bookmarks>  
  <bookmark name="A bookmark" href="#bm" />  
  <bookmark name="A bookmark 2" href="#bm2" />  
  <bookmark name="A bookmark 3" href="#bm3" />    
  <bookmark name="A bookmark 4" href="#bm4" />  
  <bookmark name="A bookmark invalid" href="#bm99" />  
</bookmarks> 
</head> 
<body>  
   <div style="line-height: 100%; font-size: 12pt; page-break-before: always;">  
      <a name="bm">some text</a>  
   </div>  
   <div style="line-height: 100%; font-size: 12pt; page-break-before: always;">  
      <a name="bm2">some text</a>  
   </div>  
   <div style="line-height: 100%; font-size: 12pt; page-break-before: always;">  
     <a name="bm3">some text</a>  
   </div>  
   <div style="line-height: 100%; font-size: 12pt; page-break-before: always;">  
      <p>some text</p>  <p>some text</p>  <p>some text</p>  <p>some text</p>  <p>some text</p>  <p>some text</p>  
      <p><a name="bm4">and some more text</a></p>  
   </div> 
</body> 
</html>`

所以看来添加书签只不过是在中声明书签并将它们作为中的锚点引用。

这应该适用于您现有的 XHTML->PDF 转换，而不需要任何代码更改。

It seems bookmarks were added in R6, but the user guide only gives them a passing reference. with a TODO to the author to add an example later.

Searching the forums, I found this example:

<html> 
<head>  
<bookmarks>  
  <bookmark name="A bookmark" href="#bm" />  
  <bookmark name="A bookmark 2" href="#bm2" />  
  <bookmark name="A bookmark 3" href="#bm3" />    
  <bookmark name="A bookmark 4" href="#bm4" />  
  <bookmark name="A bookmark invalid" href="#bm99" />  
</bookmarks> 
</head> 
<body>  
   <div style="line-height: 100%; font-size: 12pt; page-break-before: always;">  
      <a name="bm">some text</a>  
   </div>  
   <div style="line-height: 100%; font-size: 12pt; page-break-before: always;">  
      <a name="bm2">some text</a>  
   </div>  
   <div style="line-height: 100%; font-size: 12pt; page-break-before: always;">  
     <a name="bm3">some text</a>  
   </div>  
   <div style="line-height: 100%; font-size: 12pt; page-break-before: always;">  
      <p>some text</p>  <p>some text</p>  <p>some text</p>  <p>some text</p>  <p>some text</p>  <p>some text</p>  
      <p><a name="bm4">and some more text</a></p>  
   </div> 
</body> 
</html>`

So it seems that adding bookmarks is no more than declaring the bookmarks in the <head> and referencing them as anchors in the <body>.

This should work will with your existing XHTML->PDF conversion without requiring any code changes.

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