问题
Is it possible and what tools could be used to parse an html document as a string or from a file and then to construct a DOM tree so that a developer can walk the tree through some API.
For example:
DomRoot = parse("myhtml.html");
for (tags : DomRoot) {
}
Note: this is a HTML document not XHtml.
回答1:
You can use TagSoup - it is a SAX Compliant parser that can clean malformed content such as HTML from generic web pages into well-formed XML.
This is <B>bold, <I>bold italic, </b>italic, </i>normal text
gets correctly rewritten as:
This is <b>bold, <i>bold italic, </i></b><i>italic, </i>normal text.
回答2:
JTidy should let you do what you want.
Usage is fairly straight forward, but parsing is configurable. e.g.:
InputStream in = ...;
Tidy tidy = new Tidy();
// configure Tidy instance as required
...
...
Document doc = tidy.parseDOM(in, null);
Element root = doc.getDocumentElement();
The JavaDoc is hosted here.
回答3:
You can take a look at NekoHTML, a Java library that performs a best effort cleaning and tag balancing in your document. It is an easy way to parse a malformed HTML (or a non-valid XML) file.
It is distributed under the Apache 2.0 license.
回答4:
HTML Parser seems to support conversion from HTML to XML. Then you can build a DOM tree using the usual Java toolchain.
回答5:
There are several open source tools to parse HTML from Java.
Check http://java-source.net/open-source/html-parsers
Also you can check answers to this question: Reading HTML file to DOM tree using Java It is almost the same...
来源：https://stackoverflow.com/questions/1433250/possible-to-parse-a-html-document-and-build-a-dom-treejava