Java: DocumentBuilderFactory call the method that the XML instance

First get: get the factory instance of the DOM parser           DocumentBuilderFactory domfac = DocumentBuilderFactory. NewInstance ();

Then get the DOM parser from the DOM factory

  DocumentBuilder dombuilder = domfac. NewDocumentBuilder ();

) converts the XML document to be parsed into an input stream so that the DOM parser can parse it

InputStream is = new  FileInputStream (" test1. XML ");                

(4) parse the input stream of the XML Document to get a Document

  Document doc = dombuilder. Parse (is);

(5) get the root node of the XML document

Element root = doc. GetDocumentElement ();

(6) get the child node of the node

  NodeList books. = root getChildNodes ();

package com.st.demo;   

import java.io.File;   
import java.io.FileInputStream;   
import java.io.InputStream;   

import javax.xml.parsers.DocumentBuilder;   
import javax.xml.parsers.DocumentBuilderFactory;   

import org.w3c.dom.Document;   
import org.w3c.dom.Element;   
import org.w3c.dom.Node;   
import org.w3c.dom.NodeList;   

public class XmlReader {   
    public static void main(String[] args) {   
        XmlReader reader = new XmlReader();   
    }   
    public XmlReader(){   
        DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();   
        try {   
            DocumentBuilder domBuilder = domfac.newDocumentBuilder();   
            InputStream is = new FileInputStream(new File("D:/test1.xml"));   
            Document doc = domBuilder.parse(is);   
            Element root = doc.getDocumentElement();   
            NodeList books = root.getChildNodes();   
            if(books!=null){   
                for (int i = 0; i < books.getLength(); i++) {   
                    Node book = books.item(i);   
                     if(book.getNodeType()==Node.ELEMENT_NODE) {   
                            //(7) get the attribute value of the node & PI;  
                            String email=book.getAttributes().getNamedItem("email").getNodeValue();   
                            System.out.println(email);   
                            //Note that the attributes of a node are also its children. Its Node type is also node.element_node & NBSP;  
                            //(8) rotary cycle child node & NBSP;  
                            for(Node node=book.getFirstChild();node!=null;node=node.getNextSibling()) {   
                                if(node.getNodeType()==Node.ELEMENT_NODE) {   
                                    if(node.getNodeName().equals("name")) {   
                                        String name=node.getNodeValue();   
                                        String name1=node.getFirstChild().getNodeValue();   
                                        System.out.println(name);   
                                        System.out.println(name1);   
                                    }   
                                    if(node.getNodeName().equals("price")) {   
                                        String price=node.getFirstChild().getNodeValue();   
                                        System.out.println(price);   
                                    }   
                                }   
                            }   
                     }   
                }   
            }   
        } catch (Exception e) {   
            // TODO Auto-generated catch block   
            e.printStackTrace();   
        }   

    }   
}