XML Parser

XML Parser

XML Parser provides way how to access or modify data present in an XML document. Java provides multiple options to parse XML document.

1) Dom Parser - DOM parser parses the entire XML document and loads it into memory; then models it in a “TREE” structure for easy traversal and we iterate through the Node and Node List to get the content of the XML. DOM Parser is slow and consumes a lot of memory when it loads an XML document which contains a lot of data

2)      SAX Parser - SAX parser doesn’t load the complete XML into the memory, instead it parses the XML line by line triggering different events as and when it encounters different elements like: opening tag, closing tag, character data and comments and so on. This is the reason why SAX Parser is called an event based parser.

3) StAX Parser - StAX stands for Streaming API for XML. The SAX Parser pushes the data but StAX parser pulls the required data from the XML. StAX is a "pull" API. SAX is a "push" API.

StAX can do both XML reading and writing. SAX can only do XML reading.