Java non validating dom parser
What he wants to produce, is a list with the SSN and the grades.Also we assume that in his application, the instructor use no data structure such as arrays to store the student personal information and the points.a) Construction of DOM tree b) Traversing the DOM tree It does a Depth First Pre Order Traversal , for more on tree traversal techniques see here As it goes through each node it prints it contents.This snippet explains how to handle the element Node parses a XML document and prints it on the console.When a Sax parser parses a XML document and every time it encounters a tag it calls the corresponding tag handler methods when it encounter a Start Tag it calls this method public void start Element(String name, Attribute List attrs) when it encounter a End Tag it calls this method public void end Element(String name) This program also parses a XML file and prints it on the console . In this example, the Print Using Sax Class extends the Handler Base class and implemets the call back methods to handle the printing The steps involved are Get a instance of SAX parser, The previous program illustrated how to Parse an existing XML file using both SAX and DOM Parsers.But generating a XML file from scratch is a different story , for instance you might like to generate a xml file for the data extracted form the database.
previously we have already seen that how these parsers works in detail. INDENT, "yes"); //initialize Stream Result with File object to save to file Stream Result result = new Stream Result(new String Writer()); DOMSource source = new DOMSource(doc); transformer.transform(source, result); String xml String = Writer()String(); println(xml String); Transformer transformer = Transformer Instance()Transformer(); Output Property(Output Keys.A tree-based API is centered around a tree structure and therefore provides interfaces on components of a tree (which is a DOM document) such as Document interface, Node interface, Node List interface, Element interface, Attr interface and so on.What's more, it runs faster and is easier to learn than DOMParser because its API is really simple.But from the functionality point of view, it provides less functions which mean that the users themselves have to take care of more, such as creating their own data structures. I think the answer really depends on the characteristics of your application. ): Assume that an instructor has an XML document containing all the personal information of the students as well as the points his students made in his class, and he is now assigning final grades for the students using an application.