Java 读取XML文件(DOM实现)

梦里梦外; 2022-07-15 11:09 164阅读 0赞

步骤概括如下：

*  1、获取DocumentBuilderFactory
 *  2、通过DocumentBuilder工厂产生一个DocumentBuilder
 *  3、利用DocumentBuilder产生Document

下面通过简单的代码来实现上面描述的过程：

import org.w3c.dom.Document;
    import org.w3c.dom.NodeList;
    
    import java.io.File;
    
    import javax.xml.parsers.DocumentBuilder;
    import javax.xml.parsers.DocumentBuilderFactory;
    
    
    public class ParseXML { 
        public void parseXML() {
            try {
                File f = new File("user.xml");
                DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); // 步骤1
                DocumentBuilder builder = factory.newDocumentBuilder(); // 步骤2
                Document doc = builder.parse(f); // 步骤3
                NodeList nl = doc.getElementsByTagName("obj"); // 读取obj节点下的内容
    
                for (int i = 0; i < nl.getLength(); i++) {
                    String name = doc.getElementsByTagName("NAME").item(i).getFirstChild().getNodeValue();
                    String phone = doc.getElementsByTagName("PHONE").item(i).getFirstChild().getNodeValue();
                    String age = doc.getElementsByTagName("AGE").item(i).getFirstChild().getNodeValue();
    
                    System.out.println("NAME: " + name + ", PHONE: " + phone +  ", AGE: " + age);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
        public static void main(String[] args) {
            ParseXML px = new ParseXML();
            px.parseXML();
        }
    }

运行结果如下：

NAME: 张三, PHONE: 18612345678, AGE: 22
    NAME: 李四, PHONE: 13012345678, AGE: 25

**user.xml**

作者：[itmyhome][]

[itmyhome]: http://blog.csdn.net/itmyhome1990