java webserver-xml-- familiar with the SAX parsing process - Storage

public class n {

public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
    //SAX解析
    //1、获取解析工厂
    SAXParserFactory factory=SAXParserFactory.newInstance();
    //2、从解析工厂获取解析器
    SAXParser parse =factory.newSAXParser();
    //3、编写处理器
    //4、加载文档 Document 注册处理器
    PersonHandler handler=new PersonHandler();
    //5、解析
    parse.parse(Thread.currentThread().getContextClassLoader()
    .getResourceAsStream("hell\\pp.xml")
    ,handler);

    //获取数据
    List<Person> persons=handler.getPersons();
    for(Person p:persons)
    {
        System.out.println(p.getName()+"-->"+p.getAge());
    }
}

}
class PersonHandler extends DefaultHandler{
    private List<Person> persons;
    private Person person;
    private String tag; //存储操作标签
    @Override//开始文档
    public void startDocument() throws SAXException {
        persons =new ArrayList<Person>();
    }

@Override//开始内容
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
    //qName获得标签
    if(null!=qName)
    {
        tag=qName;//存储标签

        if(tag.equals("person")) {
            person =new Person();
        }
    }
}

@Override//获得字符串内容
public void characters(char[] ch, int start, int length) throws SAXException {
    String contents = new String(ch,start,length).trim();
    if(null!=tag) { //处理空的问题
        if(tag.equals("name"))  //当执行下一段时,tag还是name的标签,又会将空白setName()覆盖上次内容;
        {
            person.setName(contents);
        }else if(tag.equals("age"))
        {
            if(contents.length()>0)
            {
                person.setAge(Integer.valueOf(contents));
            }
        }
    }
}

@Override//结束内容
public void endElement(String uri, String localName, String qName) throws SAXException {
    if(null!=qName) { //处理空
        if(qName.equals("person"))
        {
            persons.add(person);
        }
        tag=null; //tag重赋值
    }
}
@Override//结束文档
public void endDocument() throws SAXException {

}

public List<Person> getPersons() {
    return persons;
}

public void setPersons(List<Person> persons) {
    this.persons = persons;
}

}

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Origin blog.51cto.com/14437184/2434440