寶寶不開心

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.NodeList;
import org.xml.sax.SAXException;

public class DomTest {

    public static void main(String[] args) {
        //1.創建一個DocumentBuilderFactory對象
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        //2.創建一個DocumentBuilder對象
        try {
            //3.創建一個Document對象
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            //4.通過Document對象的perse方法加載book。xml文件到當前項目下
            Document document = documentBuilder.parse("book.xml");
            //獲取book結點的集合
            NodeList bookList = document.getElementsByTagName("book");
            //遍歷每一個book節點
            //獲取bookLength()長度
            System.out.println("共有" + bookList.getLength() + "本書");
            for(int i = 0;i < bookList.getLength();i++) {
                System.out.println("現在開始遍歷第" + (i + 1) + "本書---");
                //通過item(i)獲取book節點，下標從0開始
                Node book = bookList.item(i);
                //獲取book屬性集合
                NamedNodeMap attrs = book.getAttributes();
                //遍歷book屬性
                System.out.println("第" + (i + 1) + "本書共有" + attrs.getLength()+ "個屬性");
                for(int j = 0;j < attrs.getLength();j++) {
                    //通過item()獲取屬性
                    Node attr = attrs.item(j);
                    System.out.print("屬性名" + attr.getNodeName());
                    System.out.println("   屬性值" + attr.getNodeValue());
                }

                Element book = (Element)bookList.item(i);
                String attrValue = book.getAttribute("id");
                System.out.println(attrValue);

                System.out.println("第" + (i + 1) + "本書遍歷完畢");
            }
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

public class DomTest {

    public static void main(String[] args) {
        //1.創建一個DocumentBuilderFactory對象
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        //2.創建一個DocumentBuilder對象
        try {
            //3.創建一個Document對象
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            //4.通過Document對象的perse方法加載book。xml文件到當前項目下
            Document document = documentBuilder.parse("book.xml");
            //獲取book結點的集合
            NodeList bookList = document.getElementsByTagName("book");
            //遍歷每一個book節點
            //獲取bookLength()長度
            System.out.println("共有" + bookList.getLength() + "本書");
            for(int i = 0;i < bookList.getLength();i++) {
                System.out.println("------------現在開始遍歷第" + (i + 1) + "本書---------");
                //通過item(i)獲取book節點，下標從0開始
                Node book = bookList.item(i);
                //獲取book屬性集合
                NamedNodeMap attrs = book.getAttributes();
                //遍歷book屬性
                System.out.println("第" + (i + 1) + "本書共有" + attrs.getLength()+ "個屬性");
                for(int j = 0;j < attrs.getLength();j++) {
                    //通過item()獲取屬性
                    Node attr = attrs.item(j);
                    System.out.print("屬性名" + attr.getNodeName());
                    System.out.println("   屬性值" + attr.getNodeValue());
                }
                NodeList childNodes = book.getChildNodes();
                //遍歷childNodes獲取節點名和結點值
                System.out.println("第" + (i + 1) + "本書共有" + 
                        childNodes.getLength() + "個子節點");
                for(int k = 0;k < childNodes.getLength();k++) {
                    //區分text類型的Node和Element類型的Node
                    if(childNodes.item(k).getNodeType() == Node.ELEMENT_NODE) {
                        //獲取Element節點名和節點名
                        System.out.print("第" + (k + 1) + "個節點的節點名是" + 
                                childNodes.item(k).getNodeName());

                        System.out.println("----節點的節點值是" + 
                                childNodes.item(k).getFirstChild().getNodeValue());

                        System.out.println("----節點的節點值是" + 
                                childNodes.item(k).getTextContent());
                    }
                }
                System.out.println("------------第" + (i + 1) + "本書遍歷完畢-------------");
            }
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}