<?xml version="1.0" encoding="utf-8" ?>
<class>
    <student id="1">
        <name>張三</name>
        <gender>男</gender>
        <age>26</age>
    </student>
    <student id="2">
        <name>里斯</name>
        <gender>男</gender>
        <age>36</age>
    </student>
 <student id="3">
        <name>王五</name>
        <gender>女</gender>
        <age>24</age>
    </student>
</class>

import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.InputStream;

public class DomDemo {
    
    public static void main(String[] args) {
        // 1.獲取xml文件流
        InputStream inputStream = DomDemo.class.getClassLoader().getResourceAsStream("demo.xml");
        // 2.創(chuàng)建DocumentBuilderFactory對象
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        // 3.創(chuàng)建DocumentBuilder對象
        try {
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document d = builder.parse(inputStream);
            NodeList stdList = d.getElementsByTagName("student");
            for (int i = 0; i <stdList.getLength() ; i++) {
                Node std = stdList.item(i);
                // 遍歷標(biāo)簽屬性
                NamedNodeMap attrs = std.getAttributes();
                for(int j=0; j< attrs.getLength(); j++){
                    Node attr = attrs.item(j);
                    System.out.println(attr.getNodeName()+"："+attr.getNodeValue());
                }
                // 遍歷標(biāo)簽子節(jié)點
                NodeList childNodes = std.getChildNodes();
                for (int k = 0; k <childNodes.getLength() ; k++) {
                    if (childNodes.item(k).getNodeType()== Node.ELEMENT_NODE) {
                        System.out.println(childNodes.item(k).getNodeName() + "：" + childNodes.item(k).getTextContent());
                    }
                }
                System.out.println("==============");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}


運(yùn)行結(jié)果如下：
id：1
name：張三
gender：男
age：26
==============
id：2
name：里斯
gender：男
age：36
==============
id：3
name：王五
gender：女
age：24
==============

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class SAXDemoHandel extends DefaultHandler {

    private String value;

    private Map<String, String> student;

    private List<Map<String, String>> students = new ArrayList<>();

    public List<Map<String, String>> getStudents() {
        return students;
    }

    /**
     * xml 解析開始
     * @throws SAXException
     */
    @Override
    public void startDocument() throws SAXException {
        super.startDocument();
        System.out.println("xml 解析開始");
    }

    /**
     * xml 解析結(jié)束
     * @throws SAXException
     */
    @Override
    public void endDocument() throws SAXException {
        super.endDocument();
        System.out.println("xml 解析結(jié)束");
    }

    /**
     * 解析 XML 元素開始
     * @param uri
     * @param localName
     * @param qName
     * @param attributes
     * @throws SAXException
     */
    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        super.startElement(uri, localName, qName, attributes);
        System.out.println("開始遍歷節(jié)點：" +  qName);

        if (qName.equals("student")){
            student = new HashMap<>();
            for(int i=0; i<attributes.getLength();i++){
                student.put(attributes.getQName(i), attributes.getValue(i));
            }
        }
    }

    /**
     * 解析 XML 元素結(jié)束
     * @param uri
     * @param localName
     * @param qName
     * @throws SAXException
     */
    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        super.endElement(uri, localName, qName);
        System.out.println("節(jié)點遍歷結(jié)束：" +  qName);

        if(qName.equals("student")){
            students.add(student);
            student = null;
        } else if(qName.equals("name") || qName.equals("gender") || qName.equals("age")){
            student.put(qName, value);
        }
    }

    @Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        super.characters(ch, start, length);

        // 獲取節(jié)點值數(shù)組
        value = new String(ch,start,length).trim();
        if (!value.equals("")) {
            System.out.println(value);
        }
    }
}

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import java.io.InputStream;
import java.util.List;
import java.util.Map;

public class SAXDemo {

    public static void main(String[] args) throws Exception {
        // 1.獲取xml文件流
        InputStream inputStream = SAXDemo.class.getClassLoader().getResourceAsStream("demo.xml");
        // 2.獲取SAXParserFactory實例
        SAXParserFactory factory = SAXParserFactory.newInstance();
        // 3.獲取SAXparser實例
        SAXParser saxParser = factory.newSAXParser();
        // 4.創(chuàng)建Handel對象
        SAXDemoHandel handel = new SAXDemoHandel();
        // 5.解析XML文件
        saxParser.parse(inputStream, handel);
        // 6.獲取讀取結(jié)果
        List<Map<String, String>> students = handel.getStudents();
        for (Map<String, String> student : students) {
            System.out.println(student.toString());
        }
    }
}
運(yùn)行結(jié)果如下：

{gender=男, name=張三, id=1}
{gender=男, name=里斯, id=2}
{gender=女, name=王五, id=3}

<!--jdom -->
<dependency>
    <groupId>org.jdom</groupId>
    <artifactId>jdom</artifactId>
    <version>1.1.3</version>
</dependency>

import org.jdom.Attribute;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import java.io.InputStream;
import java.util.List;


public class JdomDemo {

    public static void main(String[] args) throws Exception {
        // 1.獲取xml文件流
        InputStream inputStream = JdomDemo.class.getClassLoader().getResourceAsStream("demo.xml");
        // 2.創(chuàng)建SAXBuilder對象
        SAXBuilder saxBuilder = new SAXBuilder();
        // 3.將輸入流加載到build中
        Document document = saxBuilder.build(inputStream);
        // 4.獲取根節(jié)點
        Element rootElement = document.getRootElement();
        // 5.獲取子節(jié)點
        List<Element> children = rootElement.getChildren();
        for (Element child : children) {
            List<Attribute> attributes = child.getAttributes();
            // 遍歷標(biāo)簽屬性
            for (Attribute attr : attributes) {
                System.out.println(attr.getName()+":"+attr.getValue());
            }
            // 遍歷標(biāo)簽子節(jié)點
            List<Element> childrenList = child.getChildren();
            for (Element  o: childrenList) {
                System.out.println(o.getName() + "：" + o.getValue());
            }
            System.out.println("==============");
        }
    }
}
運(yùn)行結(jié)果如下：

id:1
name：張三
gender：男
age：26
==============
id:2
name：里斯
gender：男
age：36
==============
id:3
name：王五
gender：女
age：24
==============

 <!-- dom4j -->
 <dependency>
     <groupId>dom4j</groupId>
     <artifactId>dom4j</artifactId>
     <version>1.6.1</version>
</dependency>

public class Dom4jDemo {

    public static void main(String[] args) throws Exception {
        // 1.獲取xml文件流
        InputStream inputStream = Dom4jDemo.class.getClassLoader().getResourceAsStream("demo.xml");
        // 2.創(chuàng)建Reader對象
        SAXReader reader = new SAXReader();
        // 3.加載xml
        Document document = reader.read(inputStream);
        // 4.獲取根節(jié)點
        Element rootElement = document.getRootElement();
        // 5.遍歷元素
        Iterator iterator = rootElement.elementIterator();
        while (iterator.hasNext()){
            Element stu = (Element) iterator.next();
            // 遍歷標(biāo)簽屬性
            List<Attribute> attributes = stu.attributes();
            for (Attribute attribute : attributes) {
                System.out.println(attribute.getName() + "：" + attribute.getValue());
            }

            // 遍歷標(biāo)簽子節(jié)點
            Iterator iterator1 = stu.elementIterator();
            while (iterator1.hasNext()){
                Element stuChild = (Element) iterator1.next();
                System.out.println(stuChild.getName()+"："+stuChild.getStringValue());
            }
            System.out.println("==============");
        }
    }
}
運(yùn)行結(jié)果如下：

id：1
name：張三
gender：男
age：26
==============
id：2
name：里斯
gender：男
age：36
==============
id：3
name：王五
gender：女
age：24
==============