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我创建了一个简单的 JavaFX (2.2) FXML 项目。我正在尝试将 html 字符串转换为不同的元素，并将它们添加到 iText 生成的 PDF 文档中的段落中。由于 HTMLWorker 已被弃用，我使用 XMLWorker。它似乎确实适用于自己编写的简单 html 字符串，例如：

StringReader in = new StringReader("<html><body><p>test</p></body></html>");

但是，当我尝试使用 JavaFX HTMLEditor 控件生成的 html 字符串时，我收到以下消息：

Caused by: java.lang.NoSuchMethodError: com.itextpdf.tool.xml.html.pdfelement.NoNewLineParagraph.setMultipliedLeading(F)V
at com.itextpdf.tool.xml.html.AbstractTagProcessor.currentContentToParagraph(AbstractTagProcessor.java:268)
at com.itextpdf.tool.xml.html.Span.end(Span.java:77)
at com.itextpdf.tool.xml.html.AbstractTagProcessor.endElement(AbstractTagProcessor.java:192)
at com.itextpdf.tool.xml.pipeline.html.HtmlPipeline.close(HtmlPipeline.java:207)
at com.itextpdf.tool.xml.XMLWorker.endElement(XMLWorker.java:142)
at com.itextpdf.tool.xml.parser.XMLParser.endElement(XMLParser.java:396)
at com.itextpdf.tool.xml.parser.state.ClosingTagState.process(ClosingTagState.java:71)
at com.itextpdf.tool.xml.parser.XMLParser.parseWithReader(XMLParser.java:236)
at com.itextpdf.tool.xml.parser.XMLParser.parse(XMLParser.java:214)
at com.itextpdf.tool.xml.XMLWorkerHelper.parseXHtml(XMLWorkerHelper.java:149)
at hmtltopdf.FXMLDocumentController.handleButtonAction(FXMLDocumentController.java:64)
... 54 more

我的猜测是 html 字符串中有一堆标签无法被 XMLWorker 识别。HTML 编辑器创建这个 html 字符串：

<html><head></head><body contenteditable="true"><p style="text-align: left;"><font face="'Segoe UI'">test</font></p></body></html>

如果是这种情况，有没有办法“清理” html 字符串？还是我必须使用其他某种 HTML 编辑器？

我的示例项目代码：

//using iText 5.3.1 and XMLWorker 5.5.0

@FXML
private HTMLEditor htmlEditor;

@FXML
private void handleButtonAction(ActionEvent event) {
    final Document document = new Document();

    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("D:/test/loremipsum.pdf"));

    document.open();

    //StringReader in = new StringReader("<html><body><p>test</p></body></html>"); //this works
    StringReader in = new StringReader(htmlEditor.getHtmlText()); //this does not work

    try {
        final Paragraph test = new Paragraph();
        XMLWorkerHelper.getInstance().parseXHtml(new ElementHandler() {
            @Override
            public void add(final Writable w) {
                if (w instanceof WritableElement) {
                    List<Element> elements = ((WritableElement) w).elements();
                    for (Element e : elements) {
                        test.add(e);
                    }
                }
            }
        }, in);

        document.add(test);
    } catch (IOException | DocumentException e) {
        System.out.println(e.toString());
        System.out.println(e.getMessage());
    }

    document.close();
}

编辑：

<b>使用, <i>, ... 或其他标签时，问题似乎开始了。

4

1 回答 1

3

啊，它似乎与使用较旧的 iText 版本有关。我已经更新到 iText 5.5.0，它现在似乎可以工作了。我仍然必须删除任何<br>和<hr>标签你。

//using iText 5.5.0 and XMLWorker 5.5.0

@FXML
private HTMLEditor htmlEditor;

@FXML
private void handleButtonAction(ActionEvent event) {
    final Document document = new Document();

    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("D:/test/loremipsum.pdf"));

    document.open();

    String htmlString = htmlEditor.getHtmlText();

    htmlString = htmlString.replace("<br>", "");
    htmlString = htmlString.replace("<br/>", "");
    htmlString = htmlString.replace("<br />", "");

    htmlString = htmlString.replace("<hr>", "<p></p>");
    htmlString = htmlString.replace("<hr/>", "<p></p>");
    htmlString = htmlString.replace("<hr />", "<p></p>");

    StringReader in = new StringReader(htmlString);

    try {
        final Paragraph test = new Paragraph();
        XMLWorkerHelper.getInstance().parseXHtml(new ElementHandler() {
            @Override
            public void add(final Writable w) {
                if (w instanceof WritableElement) {
                    List<Element> elements = ((WritableElement) w).elements();
                    for (Element e : elements) {
                        test.add(e);
                    }
                }
            }
        }, in);

        document.add(test);
    } catch (IOException | DocumentException e) {
        System.out.println(e.toString());
        System.out.println(e.getMessage());
    }

    document.close();
}
于 2014-05-05T12:57:03.637 回答