HTML label and attribute analysis supported by HTMLPARSER framework
The HTMLPARSER framework is a Java library used to analyze HTML documents.It can analyze the HTML mark and attributes, and provide a simple way to obtain and process the content of the HTML document.
HTMLPARSER framework supports analysis HTML tags include, but not limited to the following:
1. Title tags (H1, H2, H3, etc.): Used to display the title of the article, you can obtain the title content of the document by parsing.
2. Paragraph label (P): It is used to organize text content and analyze the paragraph content in the document.
3. Hyperlink label (A): It is used to create links to other pages or resources to analyze URL and text content that can obtain links.
4. Image label (IMG): It is used to display images and analyze the URL, width, and height of the image to obtain the image.
5. List label (UL, OL, Li): It is used to display the content of the list, and the content of the list can be obtained.
6. Table label (TABLE, TR, TD): Used to display the content of the table, analyze the lines, columns, and cells of the table.
In addition, the HTMLPARSER framework also supports the attributes of HTML tags, such as:
1. HREF Properties: The target URL for specifying the hyperlink.
2. SRC attribute: URL for specifying the image label.
3. Width and Height attributes: The width and height of the specified image or table.
4. Class attribute: CSS class used to specify labels.
5. ID attribute: the unique identifier for specifying the label.
Below is a Java code example using the HTMLPARSER framework to analyze the HTML document:
import org.htmlparser.Node;
import org.htmlparser.Parser;
import org.htmlparser.filters.NodeClassFilter;
import org.htmlparser.util.NodeList;
import org.htmlparser.util.ParserException;
public class HTMLParserExample {
public static void main(String[] args) {
try {
// Create an HTML parser
Parser Parser = New Parser ("https://example.com"); // replace it with the URL of the html document you want to analyze
// Use a filter to get all the link tags
NodeClassFilter filter = new NodeClassFilter(org.htmlparser.tags.LinkTag.class);
NodeList nodeList = parser.extractAllNodesThatMatch(filter);
// Traversing the link label and printed URL and text content
for (int i = 0; i < nodeList.size(); i++) {
org.htmlparser.tags.LinkTag link = (org.htmlparser.tags.LinkTag) nodeList.elementAt(i);
String url = link.extractLink();
String text = link.getLinkText();
System.out.println("URL: " + url);
System.out.println("Text: " + text);
}
} catch (ParserException e) {
e.printStackTrace();
}
}
}
The above example code demonstrates how to use the HTMLPARSER framework to analyze the link label in the HTML document and print the linked URL and text content.You can modify the code as needed to analyze other HTML tags and attributes.
