Learn from the analysis technology and algorithm in the JODD LAGARTO framework
Learn from the analysis technology and algorithm in the JODD LAGARTO framework
Overview:
JODD LAGARTO is a lightweight Java HTML/XML parser, which provides powerful and efficient analytical technologies and algorithms.Its design goals are fast, stable and easy to use, enabling developers to easily handle HTML and XML documents.This article will explore the analysis technology and algorithms in the JODD LAGARTO framework and provide relevant Java code examples.
1. Basic principles of JODD LAGARTO framework
JODD LAGARTO uses a streaming analysis method to build the tree structure of the HTML/XML document by parsing the label and elements one by one.Its parser has the characteristics of efficient and low memory consumption, which can handle large files and maintain the lowest memory usage during the parsing process.
2. Analysis technology and algorithm
2.1 label and element analysis
JODD LAGARTO uses a limited state machine to analyze HTML/XML tags and elements.It divides the document flow into different states, and judge the next step logic according to the current state and input characters.This analysis technology can efficiently handle various marks and elements while reducing memory overhead.
The following is an example code that uses JODD LAGARTO to analyze the HTML file:
try (InputStream inputStream = new FileInputStream("input.html")) {
LagartoParser lagartoParser = new LagartoParser(inputStream);
lagartoParser.parse(new NodeVisitor() {
public void script(Tag tag, CharSequence body) {
// Processing Script label
System.out.println ("Script label:" + tag.getName ());
System.out.println ("script content:" + body);
}
public void span(Tag tag) {
// Processing SPAN tag
System.out.println ("Treatment span tag:" + tag.getName ());
}
// Other custom processing methods ...
});
} catch (IOException e) {
e.printStackTrace();
}
2.2 Text Node Analysis
JODD LAGARTO uses a buffer to handle text nodes. It splices continuous text characters into a string and passes these string to the callback method during the parsing process.This analysis algorithm improves the efficiency of processing text nodes and reduces memory use.
Here are a sample code that uses JODD LAGARTO to resolve XML files:
try (InputStream inputStream = new FileInputStream("input.xml")) {
LagartoXmlParser lagartoXmlParser = new LagartoXmlParser(inputStream);
lagartoXmlParser.parse(new NodeVisitor() {
public void node(Node node) {
if (node.getNodeType() == Node.NodeType.CDATA) {
// Treatment of cdata nodes
System.out.println ("Processing CDATA node:" + Node.getNodeTypename ());
System.out.println ("CDATA content:" + node.getnodevalue ());
} else {
// Treat the text node
System.out.println ("Treatment text node:" + node.getNodeTypename ());
System.out.println ("Text content:" + Node.getNodeValue ());
}
}
// Other custom processing methods ...
});
} catch (IOException e) {
e.printStackTrace();
}
3. Summary
This article introduces the basic principles of analysis technology and algorithm in the JODD LAGARTO framework, and provides Java code examples of JODD LAGARTO analysis of HTML and XML files.JODD LAGARTO has become a good choice to process HTML and XML documents with its efficient and stable analysis capabilities, which can help developers simplify the realization of related tasks.Through in -depth learning and application of the JODD LAGARTO framework, developers can better analyze and process HTML/XML documents to improve development efficiency.
