[持续更新]htmlParser----Java处理html的利器

1.获取所有某种tag的元素

Parser parser = new Parser();
parser.setURL(path);
//parser.setInputHTML(node.toHtml());
parser.setEncoding("UTF-8");
//获取某种tag的元素
NodeFilter filter = new TagNameFilter("A");
NodeList nodes=parser.extractAllNodesThatMatch(filter);
//创建HtmlPage,获取相关元素
HtmlPage page= new HtmlPage(parser);
parser.visitAllNodesWith(page);
NodeList list = page.getBody();

2.Node常用的操作

String s = certainNode.toPlainTextString()//获取node的纯文本内容(不包括tag)
NodeList nl = certainNode.getChildren();//获取子节点
Node n = certainNode.getParent();//获取父节点
Node n = certainNode.getPreviousSibling();//获取上一个兄弟节点
Node n = certainNode.getNextSibling();//获取下一个兄弟节点
String s = certainNode.toHtml()//获取node的html内容(包括tag)
boolean b = certainNode instanceof LinkTag;//是否是某一类型的tag,LinkTag是内置的,在org.htmlparser.tags下

3.NodeList常用的操作

int size = certainNodeList.size();
Node n = certainNodeList.elementAt(int i);//获取某一元素

4.遍历NodeList

SimpleNodeIterator iterator = nodeList.elements();
while(iterator.hasMoreNodes()){
    Nodenode =iterator.nextNode();
    ...
}

5.判断某一节点类型的方法

1)node.getClass().toString().equals("class org.htmlparser.nodes.TextNode");
2)node.toHtml().trim().toLowerCase().startsWith("<ul");
3)node instanceof HeadingTag;

附录:

htmlparser的tag:

reference:http://htmlparser.sourceforge.net/javadoc/org/htmlparser/tags/package-summary.html

AppletTag	AppletTag represents an <Applet> tag.
BaseHrefTag	BaseHrefTag represents an <Base> tag.
BodyTag	A Body Tag.
Bullet	A bullet tag.
BulletList	A bullet list tag.
CompositeTag	The base class for tags that have an end tag.
DefinitionList	A definition list tag (dl).
DefinitionListBullet	A definition list bullet tag (either DD or DT).
Div	A div tag.
DoctypeTag	The HTML Document Declaration Tag can identify <!DOCTYPE> tags.
FormTag	Represents a FORM tag.
FrameSetTag	Identifies an frame set tag.
FrameTag	Identifies a frame tag
HeadingTag	A heading (h1 - h6) tag.
HeadTag	A head tag.
Html	A html tag.
ImageTag	Identifies an image tag.
InputTag	An input tag in a form.
JspTag	The JSP/ASP tags like <%...%> can be identified by this class.
LabelTag	A label tag.
LinkTag	Identifies a link tag.
MetaTag	A Meta Tag
ObjectTag	ObjectTag represents an <Object> tag.
OptionTag	An option tag within a form.
ParagraphTag	A paragraph (p) tag.
ProcessingInstructionTag	The XML processing instructions like <?xml ...
ScriptTag	A script tag.
SelectTag	A select tag within a form.
Span	A span tag.
StyleTag	A StyleTag represents a <style> tag.
TableColumn	A table column tag.
TableHeader	A table header tag.
TableRow	A table row tag.
TableTag	A table tag.
TextareaTag	A text area tag within a form.
TitleTag	A title tag.