2021.8.6 notes jsoup

jsoup object

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;
import java.net.URL;

public class xmlJsoupPra {
    
    public static void main(String[] args) throws IOException {
    

        /** * 1.parse( file （ Need to path）,  Encoding mode ) */
        String path = xmlJsoupPra.class.getClassLoader().getResource("student.xml").getPath();
        Document document = Jsoup.parse(new File(path), "utf-8");
        Elements eles = document.getElementsByTag("name");
        Element element = eles.get(0);
        String text = element.text();
        System.out.println(text);
        /** * 2.String */
        String str = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n" +
                "<students>\n" +
                " <studnt number=\"1001\">\n" +
                " <name>zhangsan</name>\n" +
                " <age>18</age>\n" +
                " <grender>male</grender>\n" +
                " </studnt>\n" +
                " <studnt number=\"1002\">\n" +
                " <name>lisi</name>\n" +
                " <age>15</age>\n" +
                " <grender>female</grender>\n" +
                " </studnt>\n" +
                "</students>";
        Document parse1 = Jsoup.parse(str);
        System.out.println(parse1);

        /** * 3.url */
        URL url = new URL("https://www.baidu.com");
        Document parse2 = Jsoup.parse(url, 10000);
        System.out.println(parse2);
    }
}

Document object

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;

public class DocumentObj {
    
    public static void main(String[] args) throws IOException {
    
        String path = DocumentObj.class.getClassLoader().getResource("student.xml").getPath();
        Document docu1 = Jsoup.parse(new File(path), "utf-8");

        Elements ele1 = docu1.getElementsByAttribute("number");
        Element element = ele1.get(0);
        System.out.println(element);

        Elements ele2 = docu1.getElementsByAttributeValue("number", "1001");
        System.out.println(ele2);

        Element ele3 = docu1.getElementById("i5");
        System.out.println(ele3);
    }
}

Element object

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;

public class ElementObj {
    
    public static void main(String[] args) throws IOException {
    
        String path = ElementObj.class.getClassLoader().getResource("student.xml").getPath();
        Document docu1 = Jsoup.parse(new File(path), "utf-8");

        Element ele1 = docu1.getElementsByTag("student").get(0);

        Elements ele2 = ele1.getElementsByTag("name");
        System.out.println(ele2);

        String num = ele1.attr("number");
        System.out.println(num);

        Element age = ele1.getElementsByTag("age").get(0);
        String text = age.text();
        System.out.println(text);
        String htmlAge = age.html();
        System.out.println(htmlAge);
    }
}

Query by selector

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

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

public class SelectObj {
    
    public static void main(String[] args) throws IOException {
    
        String path = SelectObj.class.getClassLoader().getResource("student.xml").getPath();
        Document docu = Jsoup.parse(new File(path), "utf-8");

        Elements nameEle = docu.select("name");
        System.out.println(nameEle);

        Elements IdEle= docu.select("#i5");
        System.out.println(IdEle);

        Elements newEle = docu.select("name[id=\"i5\"]");
        System.out.println(newEle);

        Elements newEle2 = docu.select("student[number=\"1001\"] age"); //> If yes, it is a level-1 sub tag 
        System.out.println(newEle2);
    }
}