package cn.itcast.xml.jsoup;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.File;
import java.io.IOException;

/**
 * Document对象功能
 */
public class JsoupDemo3 {
    public static void main(String[] args) throws IOException {
        String path = JsoupDemo3.class.getClassLoader().getResource("student1.xml").getPath();
        Document document = Jsoup.parse(new File(path), "utf-8");
        /*
        2. Document：文档对象。代表内存中的dom树
				* 获取Element对象
					* getElementById(String id)：根据id属性值获取唯一的element对象
					* getElementsByTag(String tagName)：根据标签名称获取元素对象集合
					* getElementsByAttribute(String key)：根据属性名称获取元素对象集合
					* getElementsByAttributeValue(String key, String value)：根据对应的属性名和属性值获取元素对象集合
         */
        //2.1 获取所有的student对象
        Elements students = document.getElementsByTag("student");
        System.out.println(students);

        System.out.println("==========================");

        //2.2 获取属性名为id的元素对象们
        Elements elements1 = document.getElementsByAttribute("id");
        System.out.println(elements1);

        System.out.println("==========================");

        //2.3 获取number属性值为s001的对象
        Elements elements2 = document.getElementsByAttributeValue("number", "s001");
        System.out.println(elements2);
        System.out.println("==========================");

        Element ele = document.getElementById("1");
        System.out.println(ele);



    }
}