java----dom4j 解析XML

dom4j：

由于内部采用迭代器，适合读取大文档；

数据块

1、下载

https://dom4j.github.io/

2、添加包到工程目录下

使用

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Demo{
    public static void main(String[] args) throws IOException, DocumentException {
        DOM4jtest();
    }
    private static void DOM4jtest() throws DocumentException {
        //创建DOM4的解析器
        SAXReader saxReader = new SAXReader();
        InputStream resourceAsStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("com\\first\\person.xml");
        //DOM4j的dom树
        Document read = saxReader.read(resourceAsStream);
        //获取根节点
        Element rootElement = read.getRootElement();
        ArrayList<Person> person_List = new ArrayList<>();
        Iterator<org.dom4j.Element> iterator = rootElement.elementIterator();
        Person person = null;
        while (iterator.hasNext()){
            person  = new Person();
            Element children = iterator.next();
            String p_id = children.attributeValue("person_id");
            person.setId(p_id);
            Iterator<org.dom4j.Element> next_iterator = children.elementIterator();
            while (next_iterator.hasNext()){
                Element next_children = next_iterator.next();
                if ("name".equals(next_children.getName())){
                    String name = next_children.getText();
                    person.setName(name);
                }else if("age".equals(next_children.getName())){
                    String age = next_children.getText();
                    person.setAge(age);
                }
            }
            person_List.add(person);
        }
        person_List.forEach((p)-> System.out.println(p));
    }
}

class Person{
    private String name;
    private String age;
    private String id;
    public void setName(String name) {
        this.name = name;
    }
    public void setAge(String age) {
        this.age = age;
    }
    public void setId(String id) {
        this.id = id;
    }
    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age='" + age + '\'' +
                ", id='" + id + '\'' +
                '}';
    }
}