Java 中，使用 javax.xml.parsers.DocumentBuilderFactory 来解析 XML 文件是一种常见的做法。这个类提供了一个解析 XML 文档并返回一个 DOM（Document Object Model）对象的工厂方法。以下是一个使用 DocumentBuilderFactory 来解析 XML 文件的完整示例：

示例 XML 文件 (example.xml)

假设我们有以下内容的 XML 文件：

<?xml version="1.0" encoding="UTF-8"?>
<employees>
    <employee id="101">
        <name>John Doe</name>
        <title>Senior Developer</title>
    </employee>
    <employee id="102">
        <name>Jane Doe</name>
        <title>Project Manager</title>
    </employee>
</employees>

Java 代码示例

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

public class XMLParserDemo {

    public static void main(String[] args) {
        try {
            File inputFile = new File("example.xml");
            DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
            Document doc = dBuilder.parse(inputFile);
            doc.getDocumentElement().normalize();

            System.out.println("Root element :" + doc.getDocumentElement().getNodeName());
            NodeList nList = doc.getElementsByTagName("employee");

            System.out.println("----------------------------");

            for (int temp = 0; temp < nList.getLength(); temp++) {
                Node nNode = nList.item(temp);

                System.out.println("\nCurrent Element :" + nNode.getNodeName());

                if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                    Element eElement = (Element) nNode;

                    System.out.println("Employee ID : "
                        + eElement.getAttribute("id"));
                    System.out.println("Name : "
                        + eElement.getElementsByTagName("name").item(0).getTextContent());
                    System.out.println("Title : "
                        + eElement.getElementsByTagName("title").item(0).getTextContent());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

参考文档：Java DocumentBuilderFactory( javax.xml)使用示例(demo)代码-CJavaPy