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();
) Convert 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 and obtain a Document
Document doc=dombuilder.parse(is);
(5) Get the root node of the XML document
Element root=doc.getDocumentElement();
(6) Get the child nodes of the node
NodeList books=root.getChildNodes();
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
String email=book.getAttributes().getNamedItem("email").getNodeValue();
System.out.println(email);
//Note that the properties of a node are also its child nodes. Its node type is also Node.ELEMENT_NODE
//(8) Cycle through child nodes
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();
}
}
}