测试的xml数据：

<?xml version="1.0" encoding="utf-8" ?>

<note>

    <to>George</to>

    <from>John</from>

    <heading>Reminder</heading>

    <body>Don't forget the meeting!</body>

</note>

新建SaxTest类继承至DefaultHandle

import org.xml.sax.Attributes;

import org.xml.sax.SAXException;

import org.xml.sax.helpers.DefaultHandler;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.parsers.SAXParserFactory;

import java.io.FileInputStream;

import java.io.IOException;

public class SaxTest extends DefaultHandler {

    @Override

    public void startDocument() throws SAXException {

        System.out.println("开始解析文档");

    }

    @Override

    public void endDocument() throws SAXException {

        System.out.println("解析文档结束");

    }

    @Override

    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

        System.out.println(qName);//每个标签开始都会触发该事件,attributes是标签的属性

    }

    @Override

    public void endElement(String uri, String localName, String qName) throws SAXException {

        System.out.println(qName);//每个标签结束都会触发该事件

    }

    @Override

    public void characters(char[] ch, int start, int length) throws SAXException {

        System.out.println(new String(ch, start, length));//标签开始到标签结束之间的内容

    }

    static public void main(String[] args) throws IOException, ParserConfigurationException, SAXException {

        String textXml = SaxTest.class.getResource("/").getPath() + "test.xml";

        FileInputStream inputStream = new FileInputStream(textXml);

        SAXParserFactory.newInstance().newSAXParser().parse(inputStream, new SaxTest());

    }

}

解析结果截图：

aaarticlea/png;base64,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" alt="" />

其中characters方法需要特别注意，开始标签到结束标签的内容可能不止会触发一次characters事件，也就是说标签中的内容可能会多次触发characters事件，所以如果要获取标签内的完整内容需要特别小心，一般使用StringBuilder，如下代码。

import org.xml.sax.Attributes;

import org.xml.sax.SAXException;

import org.xml.sax.helpers.DefaultHandler;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.parsers.SAXParserFactory;

import java.io.FileInputStream;

import java.io.IOException;

public class SaxTest extends DefaultHandler {

    StringBuilder stringBuilder = new StringBuilder();

    @Override

    public void startDocument() throws SAXException {

        System.out.println("开始解析文档");

    }

    @Override

    public void endDocument() throws SAXException {

        System.out.println("解析文档结束");

    }

    @Override

    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

        System.out.println(qName);//每个标签开始都会触发该事件,attributes是标签的属性

    }

    @Override

    public void endElement(String uri, String localName, String qName) throws SAXException {

        System.out.println(stringBuilder.toString().trim());

        stringBuilder.delete(0, stringBuilder.length());//输出内容,并清空stringBuilder

        System.out.println(qName);//每个标签结束都会触发该事件

    }

    @Override

    public void characters(char[] ch, int start, int length) throws SAXException {

        stringBuilder.append(ch, start, length);

    }

    static public void main(String[] args) throws IOException, ParserConfigurationException, SAXException {

        String textXml = SaxTest.class.getResource("/").getPath() + "test.xml";

        FileInputStream inputStream = new FileInputStream(textXml);

        SAXParserFactory.newInstance().newSAXParser().parse(inputStream, new SaxTest());

    }

}

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