解析xml方式之SAX，流模式解析

来源：互联网发布：刷钻平台淘宝编辑：程序博客网时间：2024/05/21 11:22

1.基本的xml文档

<?xml version="1.0" encoding="UTF-8" ?><persons>    <person>        <name>Jim</name>        <age>45</age>    </person>    <person>        <name>Ann</name>        <age>36</age>    </person></persons>

2.封装值的封装类

package com.dasenlin.prasexml;/** * 封装类 * @author Administrator * */public class Persons {    private String name;    private Integer age;    public Persons() {        super();    }    public Persons(String name, Integer age) {        super();        this.name = name;        this.age = age;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }}

3.解析的流程逻辑类

package com.dasenlin.prasexml;import java.io.IOException;import java.util.List;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.SAXException;/** * 用SAX解析xml * @author Administrator * */public class ParseXml {    public static void main(String[] args) {            //1.创建解析工厂        SAXParserFactory factory =SAXParserFactory.newInstance();            //2.获取解析器        try {            SAXParser parse =factory.newSAXParser();            //3.加载文档Document注册处理器            //4.编写处理器            PersonHandler handler=new PersonHandler();            parse.parse(Thread.currentThread().getContextClassLoader().getResourceAsStream("com/dasenlin/prasexml/persons.xml"),handler);            List <Persons> person = handler.getPersons();            for(Persons any:person){                System.out.println("name:"+any.getName()+"\tage:"+any.getAge());            }        } catch (ParserConfigurationException e) {            e.printStackTrace();        } catch (SAXException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }}

4.手写处理类

package com.dasenlin.prasexml;import java.util.ArrayList;import java.util.List;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;/** * 编写的处理器 * @author Administrator * */public class PersonHandler extends DefaultHandler {    private List<Persons> persons;    private Persons person;    private String tag;    public List<Persons> getPersons() {        return persons;    }    public void setPersons(List<Persons> persons) {        this.persons = persons;    }    @Override//开始文档    public void startDocument() throws SAXException {        persons =new ArrayList<Persons>();    }    @Override//开始元素    public void startElement(String uri, String localName, String qName,            Attributes attributes) throws SAXException {        if(null!=qName){            tag=qName;        }        if(null!=qName && qName.equals("person")){            person = new Persons();        }    }    @Override//String    public void characters(char[] ch, int start, int length) throws SAXException {        String str = new String(ch,start,length);        if(null!=tag&&tag.equals("name")){            person.setName(str);        }else if(null!=tag&&tag.equals("age")){            Integer age = Integer.parseInt(str);            person.setAge(age);        }    }    @Override//结束元素    public void endElement(String uri, String localName, String qName)            throws SAXException {        if(qName.equals("person")){            this.persons.add(person);        }        tag=null;    }    @Override//结束文档    public void endDocument() throws SAXException {        // TODO 自动生成的方法存根        super.endDocument();    }}

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