how to get HTML DOM path by text content?
a HTML file:
<html>
<body>
<div class="main">
<p id="tID">content</p>
</div>
</body>
</html>
i has a String == "content",
i want to use "content" get HTML DOM path:
html body div.main p#tID
chrome developer tools has this feature(Elements tag,bottom bar), i want to know 开发者_运维知识库how to do it in java?
thanks for your help :)
Have fun :)
JAVA CODE
import java.io.File;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import org.htmlcleaner.CleanerProperties;
import org.htmlcleaner.DomSerializer;
import org.htmlcleaner.HtmlCleaner;
import org.htmlcleaner.TagNode;
import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
public class Teste {
public static void main(String[] args) {
try {
// read and clean document
TagNode tagNode = new HtmlCleaner().clean(new File("test.xml"));
Document document = new DomSerializer(new CleanerProperties()).createDOM(tagNode);
// use XPath to find target node
XPath xpath = XPathFactory.newInstance().newXPath();
Node node = (Node) xpath.evaluate("//*[text()='content']", document, XPathConstants.NODE);
// assembles jquery/css selector
String result = "";
while (node != null && node.getParentNode() != null) {
result = readPath(node) + " " + result;
node = node.getParentNode();
}
System.out.println(result);
// returns html body div#myDiv.foo.bar p#tID
} catch (Exception e) {
e.printStackTrace();
}
}
// Gets id and class attributes of this node
private static String readPath(Node node) {
NamedNodeMap attributes = node.getAttributes();
String id = readAttribute(attributes.getNamedItem("id"), "#");
String clazz = readAttribute(attributes.getNamedItem("class"), ".");
return node.getNodeName() + id + clazz;
}
// Read attribute
private static String readAttribute(Node node, String token) {
String result = "";
if(node != null) {
result = token + node.getTextContent().replace(" ", token);
}
return result;
}
}
XML EXAMPLE
<html>
<body>
<br>
<div id="myDiv" class="foo bar">
<p id="tID">content</p>
</div>
</body>
</html>
EXPLANATIONS
- Object
documentpoints to evaluated XML. - The XPath
//*[text()='content']finds everthing with text = 'content', and find the node. - The
whileloops up to the first node, getting id and classes of current element.
MORE EXPLANATIONS
- In this new solution I'm using HtmlCleaner. So, you can have
<br>, for example, and cleaner will replace with<br/>. - To use HtmlCleaner, just download the newest jar here.
加载中,请稍侯......
精彩评论