Steps-by-Step Implementation

Step 1: Create the DocumentBuilder and Document

In Java Programming, we need to work with XML processing into the program. First, we create the DocumentBuilderFactory is used to accesses a DocumentBuilder instance and it instance is used to create a new Document which represents the XML structure.

 // Create a DocumentBuilder
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();

 // Create a new Document
        Document document = builder.newDocument();

Step 2: Create the root element

Once the XML document, we need to create one root element for the XML document then root element adds into the document.

// Create root element
        Element root = document.createElement("library");
        document.appendChild(root);

Step 3: Create child elements

Create child elements for root element add into the document using createElement and appendElement methods are used to add content into the XML document.

Step 4: Write to XML file

Write the document into the XML file using Transformer to transform the DOM structure into a stream of characters. And using StreamResult specify the output file.

XML is defined as the Extensible Markup Language, and it is mostly used as a format for storing and exchanging data between systems. To read and write XML files, Java programming offers several easily implementable libraries. The most widely used library is the built-in JAXP (Java API for XML processing).

What is DOM?

The Document Object Model (DOM) is defined as a programming interface for web documents. In the context of XML processing in Java, DOM represents XML document as a tree model, where each node in the tree model corresponds to a part of the document. They are used to work with and navigate this tree using methods of the DOM API.

Requirements to work with XML:

• Install the JDK (Java Development Kit) installed in your system.
• Once installed the code into your choice either VSCode, Eclipse, or InteljIdea wherever based on your choice code editor.
• We need to work with XML file processing and must import the javax.xml package. This package contains a parser and transforms pre-defined classes to work with XML files.

The Java API for XML Processing (JAXMP) provides a set of interfaces and classes for processing XML documents in Java programming. Here are some interfaces and classes.

• DocumentBuilder: DocumentBuilder is a pre-defined interface in the JAXMP library that defines the methods for parsing XML documents and creating a DOM (Document Object Model) tree.
• DocumentBuilderFactory: This class provides a factory for creating DocumentBuilder objects. It obtains the document builder instance, which is then used to parse XML documents.
• Document: Document is an interface that offers ways to read and modify the content of an XML document while also representing the full document.
• Element: An XML document’s interface that represents an element. Elements are the fundamental units of the XML structure.
• NodeList: An XML document’s ordered collection of nodes represented by an interface that is usually used to traverse over a list of elements.
• Transformer: An XML document transformation interface that specifies how to change the content of a Source tree into a result tree.
• Source: An interface that can represent a stream of XML, a DOM tree, or other sources as the input for a transformation.
• StreamResult: a class that shows the output of a straightforward transformation, usually as a character or byte stream.