我有XHTML内容,我必须动态地从这个内容创建一个PDF文件。我使用iText pdf转换器。 我尝试了一种简单的方法,但在调用XMLWorkerHelper解析器之后总是得到错误的结果。
XHTML:
<ul>
<li>First
<ol>
<li>Second</li>
<li>Second</li>
</ol>
</li>
<li>First</li>
</ul>
预期值:
PDF结果:
在结果中没有嵌套列表。我需要一个解决方案来调用解析器,而不是创建一个iText Document实例。
答案 0 :(得分:3)
请查看示例NestedListHtml
在此示例中,我将使用您的代码段list.html:
<ul>
<li>First
<ol>
<li>Second</li>
<li>Second</li>
</ol>
</li>
<li>First</li>
</ul>
我将其解析为ElementList
:
// CSS
CSSResolver cssResolver =
XMLWorkerHelper.getInstance().getDefaultCssResolver(true);
// HTML
HtmlPipelineContext htmlContext = new HtmlPipelineContext(null);
htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory());
htmlContext.autoBookmark(false);
// Pipelines
ElementList elements = new ElementList();
ElementHandlerPipeline end = new ElementHandlerPipeline(elements, null);
HtmlPipeline html = new HtmlPipeline(htmlContext, end);
CssResolverPipeline css = new CssResolverPipeline(cssResolver, html);
// XML Worker
XMLWorker worker = new XMLWorker(css, true);
XMLParser p = new XMLParser(worker);
p.parse(new FileInputStream(HTML));
现在我可以将此列表添加到Document
:
for (Element e : elements) {
document.add(e);
}
或者我可以将此列表列为Paragraph
:
Paragraph para = new Paragraph();
for (Element e : elements) {
para.add(e);
}
document.add(para);
您将获得所需的结果,如nested_list.pdf
所示您无法将嵌套列表添加到PdfPCell
或ColumnText
。例如:这不起作用:
PdfPTable table = new PdfPTable(2);
table.addCell("Nested lists don't work in a cell");
PdfPCell cell = new PdfPCell();
for (Element e : elements) {
cell.addElement(e);
}
table.addCell(cell);
document.add(table);
这是由于多年来ColumnText
课程的限制。我们已经评估了问题,解决此问题的唯一方法是完全重写ColumnText
。这不是我们当前技术路线图上的项目。
答案 1 :(得分:0)
这是嵌套的有序列表和无序列表的解决方法。
我正在使用富文本编辑器,根据添加ul / ol起始和结束标签的属性,为li标签赋予class属性“ ql-indent-1 / 2/2 /”。
public String replaceIndentSubList(String htmlContent) {
org.jsoup.nodes.Document document = Jsoup.parseBodyFragment(htmlContent);
Elements element_UL = document.select("ul");
Elements element_OL = document.select("ol");
if (!element_UL.isEmpty()) {
htmlContent = replaceIndents(htmlContent, element_UL, "ul");
}
if (!element_OL.isEmpty()) {
htmlContent = replaceIndents(htmlContent, element_OL, "ol");
}
return htmlContent;
}
public String replaceIndents(String htmlContent, Elements element, String tagType) {
String attributeKey = "class";
String startingULTgas = "<" + tagType + ">";
String endingULTags = "</" + tagType + ">";
int lengthOfQLIndenet = new String("ql-indent-").length();
HashMap<String, String> startingLiTagMap = new HashMap<String, String>();
HashMap<String, String> lastLiTagMap = new HashMap<String, String>();
Pattern regex = Pattern.compile("ql-indent-\\d");
HashSet<String> hash_Set = new HashSet<String>();
Elements element_Tag = element.select("li");
for (org.jsoup.nodes.Element element2 : element_Tag) {
org.jsoup.nodes.Attributes att = element2.attributes();
if (att.hasKey(attributeKey)) {
String attributeValue = att.get(attributeKey);
Matcher matcher = regex.matcher(attributeValue);
if (matcher.find()) {
if (!startingLiTagMap.containsKey(attributeValue)) {
startingLiTagMap.put(attributeValue, element2.toString());
}
hash_Set.add(matcher.group(0));
if (!startingLiTagMap.get(attributeValue)
.equalsIgnoreCase(element2.toString())) {
lastLiTagMap.put(attributeValue, element2.toString());
}
}
}
}
System.out.println(htmlContent);
Iterator value = hash_Set.iterator();
while (value.hasNext()) {
String liAttributeKey = (String) value.next();
int noOfIndentes = Integer
.parseInt(liAttributeKey.substring(lengthOfQLIndenet));
if (noOfIndentes > 1)
for (int i = 1; i < noOfIndentes; i++) {
startingULTgas = startingULTgas + "<" + tagType + ">";
endingULTags = endingULTags + "</" + tagType + ">";
}
htmlContent = htmlContent.replace(startingLiTagMap.get(liAttributeKey),
startingULTgas + startingLiTagMap.get(liAttributeKey));
if (lastLiTagMap.get(liAttributeKey) != null) {
System.out.println("Inside last Li Map");
htmlContent = htmlContent.replace(lastLiTagMap.get(liAttributeKey),
lastLiTagMap.get(liAttributeKey) + endingULTags);
}
else {
htmlContent = htmlContent.replace(startingLiTagMap.get(liAttributeKey),
startingLiTagMap.get(liAttributeKey) + endingULTags);
}
startingULTgas = "<" + tagType + ">";
endingULTags = "</" + tagType + ">";
}
System.out.println(htmlContent);[enter image description here][1]
return htmlContent;
}