Dovx4J:在ToC中启用页码将在TocException中生成

Question

我在实习项目中使用Docx4j，当我试图生成一个带有页码的ToC时，它不起作用。

执行代码

if (template.isGenerateToc()) {
            Toc.setTocHeadingText("Inhaltsverzeichnis");

            TocGenerator tocGenerator = new TocGenerator(wordPackage);
            tocGenerator.generateToc(2, " TOC \\o \"1-3\" \\h \\z \\u ", true);
}

工作非常好，但是.docx中没有页码(当通过Gotenberg (https://gotenberg.dev)导出到PDF时，页面编号是存在的和正确的)。

当我试图为第三个参数传递"false“时，应用程序会崩溃，其异常/堆栈跟踪如下：

org.docx4j.toc.TocException: Exception exporting package
   at org.docx4j.toc.TocGenerator.getPageNumbersMapViaFOP(TocGenerator.java:871)
   at org.docx4j.toc.TocGenerator.getPageNumbersMap(TocGenerator.java:694)
   at org.docx4j.toc.TocGenerator.populateToc(TocGenerator.java:441)
   at org.docx4j.toc.TocGenerator.generateToc(TocGenerator.java:306)
   at org.docx4j.toc.TocGenerator.generateToc(TocGenerator.java:234)
   at org.docx4j.toc.TocGenerator.generateToc(TocGenerator.java:194)

如果有用的话:这是我的TocHeading：

private static String XML_TOCHeading_BasedOn_Nothing = "<w:style w:styleId=\"TOCHeading\" w:type=\"paragraph\" xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\">"
            + "<w:name w:val=\"TOC Heading\"/>"
            // + "<w:basedOn w:val=\"Heading1\"/>"  // would be ok if provided already present, since
            + "<w:next w:val=\"Normal\"/>"
            + "<w:uiPriority w:val=\"39\"/>"
            + "<w:semiHidden/>"
            + "<w:unhideWhenUsed/>"
            + "<w:qFormat/>"
            + "<w:pPr>"
            + "<w:keepNext/>"
            + "<w:keepLines/>"
            + "<w:spacing w:after=\"150\" w:before=\"480\"/>"
            + "<w:outlineLvl w:val=\"9\"/>"
            + "</w:pPr>"
            + "<w:rPr>"
            + "<w:rFonts w:ascii=\"Arial\" w:hAnsi=\"Arial\" w:cs=\"Arial\"/>"
            + "<w:b/>"
            + "<w:bCs/>"
            + "<w:sz w:val=\"36\"/>"
            + "<w:szCs w:val=\"36\"/>"
            + "</w:rPr>"
            + "</w:style>";

对于如何修复此异常并在我的toc中生成页码有什么想法吗？

编辑：

我更新了依赖项，现在我仍然获得TocException，但现在有了另一个原因：

Caused by: org.docx4j.openpackaging.exceptions.Docx4JException: Exception exporting package
    at org.docx4j.convert.out.common.AbstractExporter.export(AbstractExporter.java:106)
    at org.docx4j.Docx4J.toFO(Docx4J.java:734)
    at org.docx4j.toc.TocGenerator.getPageNumbersMapViaFOP(TocGenerator.java:843)
    ... 97 more
Caused by: java.lang.NullPointerException
    at org.docx4j.convert.out.common.preprocess.Containerization.borderChanged(Containerization.java:390)
    at org.docx4j.convert.out.common.preprocess.Containerization.bordersChanged(Containerization.java:377)
    at org.docx4j.convert.out.common.preprocess.Containerization.groupBodyContent(Containerization.java:204)
    at org.docx4j.convert.out.common.preprocess.Containerization.groupAdjacentBorders(Containerization.java:129)
    at org.docx4j.convert.out.common.preprocess.Containerization.process(Containerization.java:120)
    at org.docx4j.convert.out.common.Preprocess.process(Preprocess.java:165)
    at org.docx4j.convert.out.common.AbstractWmlExporter.preprocess(AbstractWmlExporter.java:51)
    at org.docx4j.convert.out.common.AbstractWmlExporter.preprocess(AbstractWmlExporter.java:32)
    at org.docx4j.convert.out.common.AbstractExporter.export(AbstractExporter.java:63)

Answer 1

不确定您使用的是哪个版本的docx4j，但是通常，要更新页码，您需要在类路径上使用FOP。

我们在8.3.3中破坏了它；它在https://github.com/plutext/docx4j/commit/50cfa5cabe08ab133f28c54b59f73d082d3e80a4#diff-29cfd63b63bfe585aa3468870ca54f1afb6e2246342c396155801b0d0aa9ae43L763上被修复了

因此，您可以在类路径上使用FOP尝试8.3.2。

或者，您可以尝试在https://www.docx4java.org/blog/2020/03/documents4j-for-toc-update/中描述的方法。

另见：

• documents4j-local：https://github.com/plutext/docx4j/blob/master/docx4j-samples-documents4j-local/src/main/java/org/docx4j/samples/documents4j/local/TocOperations.java
• documents4j-remote：https://github.com/plutext/docx4j/tree/master/docx4j-samples-documents4j-remote