Java에서 XML 구문 분석 라이브러리를 사용하여 XML 문서를 구문 분석하고 생성하는 방법은 무엇입니까?

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;

public class DOMParser {
    public static void main(String[] args) {
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document document = builder.parse("example.xml");
        
            NodeList nodeList = document.getElementsByTagName("student");
            for (int i = 0; i < nodeList.getLength(); i++) {
                Node node = nodeList.item(i);
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    Element element = (Element) node;
                    String id = element.getAttribute("id");
                    String name = element.getElementsByTagName("name").item(0).getTextContent();
                    String age = element.getElementsByTagName("age").item(0).getTextContent();
                    System.out.println("Student ID: " + id);
                    System.out.println("Name: " + name);
                    System.out.println("Age: " + age);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class SAXParserExample {
    public static void main(String[] args) {
        try {
            SAXParserFactory factory = SAXParserFactory.newInstance();
            SAXParser parser = factory.newSAXParser();
            
            DefaultHandler handler = new DefaultHandler() {
                boolean bName = false;
                boolean bAge = false;
                
                public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
                    if (qName.equalsIgnoreCase("name")) {
                        bName = true;
                    }
                    
                    if (qName.equalsIgnoreCase("age")) {
                        bAge = true;
                    }
                }
                
                public void characters(char[] ch, int start, int length) throws SAXException {
                    if (bName) {
                        System.out.println("Name: " + new String(ch, start, length));
                        bName = false;
                    }
                    
                    if (bAge) {
                        System.out.println("Age: " + new String(ch, start, length));
                        bAge = false;
                    }
                }
            };
            
            parser.parse("example.xml", handler);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class DOMGenerator {
    public static void main(String[] args) {
        try {
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document document = builder.newDocument();
            
            Element root = document.createElement("students");
            document.appendChild(root);
            
            Element student = document.createElement("student");
            root.appendChild(student);
            
            Element name = document.createElement("name");
            name.appendChild(document.createTextNode("John"));
            student.appendChild(name);
            
            Element age = document.createElement("age");
            age.appendChild(document.createTextNode("20"));
            student.appendChild(age);
            
            // ... 追加更多的节点和数据
            
            // 保存为XML文件
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            DOMSource source = new DOMSource(document);
            StreamResult result = new StreamResult(new File("example.xml"));
            transformer.transform(source, result);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.output.Format;
import org.jdom2.output.XMLOutputter;

public class JDOMGenerator {
    public static void main(String[] args) {
        try {
            Element root = new Element("students");
            Document document = new Document(root);
            
            Element student = new Element("student");
            root.addContent(student);
            
            Element name = new Element("name");
            name.setText("John");
            student.addContent(name);
            
            Element age = new Element("age");
            age.setText("20");
            student.addContent(age);
            
            // ... 添加更多节点和数据
            
            // 输出为XML字符串
            XMLOutputter outputter = new XMLOutputter(Format.getPrettyFormat());
            String xmlString = outputter.outputString(document);
            System.out.println(xmlString);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}