获取XML的文件信息

/**
 * 获取XML文件的信息
 */
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class DOMDemo {
    private Document document = null;
    public void getDocument(){
        DocumentBuilderFactory  factory=DocumentBuilderFactory.newInstance();
        try {
            DocumentBuilder builder=factory.newDocumentBuilder();
            document=builder.parse("手机信息.xml");
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public void show() {
        //找到所有的Brand
        NodeList nodelist = document.getElementsByTagName("Brand");
        //遍历每一个Brand
        for(int i = 0;i<nodelist.getLength();i++) {
            Node node = nodelist.item(i);
            //转为元素类型
            Element eleBrand = (Element)node;
            System.out.println("品牌："+eleBrand.getAttribute("name"));

            //找到每一个Type
            NodeList typelist = eleBrand.getElementsByTagName("Type");
            //遍历
            for(int j = 0;j<typelist.getLength();j++) {
                Node node2 = typelist.item(j);
                //因为Brand的子节点中可能有非元素节点，比如属性节点、文本节点
                //所以要先判断该子节点是否是一个元素节点，如果是才能进行强转
                //node2.getNodeType()这个方法是获取到当前节点的节点类型——元素节点、属性节点、文本节点
                if(node2.getNodeType()==Node.ELEMENT_NODE) {
                    Element eleType = (Element)node2;
                    System.out.println("	型号："+eleType.getAttribute("name"));
                }
            }
        }

    }

    public static void main(String[] args) {
        DOMDemo dd = new DOMDemo();
        dd.getDocument();
        dd.show();
    }

}

输出：