使用案例

import org.jsoup.Jsoup;

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

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

public class JsoupDemo5 {
    //select() 常用方法
    public static void main(String[] args) {


        //先獲取document文檔對象
        String path=JsoupDemo5.class.getClassLoader().getResource("students.xml").getPath();
        try {
            Document document= Jsoup.parse(new File(path),"UTF-8");

            //select()方法使用
            Elements all= document.select("*");
            System.out.println("顯示所有元素："+all);
            System.out.println("````````````````````````````````````````````````");

            Elements element= document.select("age");
            System.out.println("顯示包含age的元素："+element);
            System.out.println("````````````````````````````````````````````````");

            Elements id= document.select("#2");
            System.out.println("顯示id為2的元素："+id);
            System.out.println("````````````````````````````````````````````````");


            Elements class1= document.select(".te");
            System.out.println("顯示class為te的元素："+class1);
            System.out.println("````````````````````````````````````````````````");


            Elements attr= document.select("[class]");
            System.out.println("顯示屬性包含class的元素："+attr);
            System.out.println("````````````````````````````````````````````````");

            //student索引小於2的元素
            Elements lt= document.select("student:lt(1)");
            System.out.println("顯示student標簽中索引小於2的元素："+lt);
            System.out.println("````````````````````````````````````````````````");

            //student索引大於2的元素
            Elements gt= document.select("student:gt(1)");
            System.out.println("顯示student標簽中索引大於1的元素："+gt);
            System.out.println("````````````````````````````````````````````````");

            //5
           //student索引等於n的元素
            Elements eq= document.select("student:eq(1)");
            System.out.println("顯示student標簽中第二個："+eq);
            System.out.println("````````````````````````````````````````````````");

            //6
            //包含至少一個匹配選擇器元素的元素
            Elements has= document.select("student:has(kc)");
            System.out.println("顯示student包含至少一個kc："+has);
            System.out.println("````````````````````````````````````````````````");

            //7
            //與選擇器不匹配的元素
            Elements not= document.select("student:not(student:has(kc))");
            System.out.println("顯示student中不包含kc的元素："+not);
            System.out.println("````````````````````````````````````````````````");

            //8
            //包含指定文本的元素。搜索不區分大小寫。文本可以出現在找到的元素或它的任何后代元素中。
            Elements contains= document.select("student:contains(java)");
            System.out.println("查找包含文本java的student個元素。："+contains);
            System.out.println("````````````````````````````````````````````````");

            //9
            //屬性為id，值為“2”的元素
            Elements attr1= document.select("[id=2]");
            System.out.println("查找包含文本java的student個元素。："+attr1);
            System.out.println("````````````````````````````````````````````````");

            //10
            //匹配所有元素
            Elements p= document.select("kc");
            System.out.println("查找包含kc的元素："+p);
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

運行結果

顯示所有元素：
<html>
<head></head>
<body>
<students>
<student id="1" class="red" major="java">
<name color="pink">
陳夢凡
</name>
<age>
18
</age>
<favorite>
reading
</favorite>
</student>
<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
<student id="3">
<name>
javagirl
</name>
<age>
17
</age>
<favorite>
sleep
</favorite>
</student>
<student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test">
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
</students>
</body>
</html>
<html>
<head></head>
<body>
<students>
<student id="1" class="red" major="java">
<name color="pink">
陳夢凡
</name>
<age>
18
</age>
<favorite>
reading
</favorite>
</student>
<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
<student id="3">
<name>
javagirl
</name>
<age>
17
</age>
<favorite>
sleep
</favorite>
</student>
<student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test">
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
</students>
</body>
</html>
<head></head>
<body>
<students>
<student id="1" class="red" major="java">
<name color="pink">
陳夢凡
</name>
<age>
18
</age>
<favorite>
reading
</favorite>
</student>
<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
<student id="3">
<name>
javagirl
</name>
<age>
17
</age>
<favorite>
sleep
</favorite>
</student>
<student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test">
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
</students>
</body>
<students>
<student id="1" class="red" major="java">
<name color="pink">
陳夢凡
</name>
<age>
18
</age>
<favorite>
reading
</favorite>
</student>
<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
<student id="3">
<name>
javagirl
</name>
<age>
17
</age>
<favorite>
sleep
</favorite>
</student>
<student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test">
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
</students>
<student id="1" class="red" major="java">
<name color="pink">
陳夢凡
</name>
<age>
18
</age>
<favorite>
reading
</favorite>
</student>
<name color="pink">
陳夢凡
</name>
<age>
18
</age>
<favorite>
reading
</favorite>
<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
<student id="3">
<name>
javagirl
</name>
<age>
17
</age>
<favorite>
sleep
</favorite>
</student>
<name>
javagirl
</name>
<age>
17
</age>
<favorite>
sleep
</favorite>
<student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
<student id="test">
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
````````````````````````````````````````````````
顯示包含age的元素：<age>
18
</age>
<age>
18
</age>
<age>
17
</age>
<age>
178
</age>
<age>
178
</age>
<age>
11
</age>
````````````````````````````````````````````````
顯示id為2的元素：<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
````````````````````````````````````````````````
顯示class為te的元素：<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
````````````````````````````````````````````````
顯示屬性包含class的元素：<student id="1" class="red" major="java">
<name color="pink">
陳夢凡
</name>
<age>
18
</age>
<favorite>
reading
</favorite>
</student>
<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
````````````````````````````````````````````````
顯示student標簽中索引小於2的元素：<student id="1" class="red" major="java">
<name color="pink">
陳夢凡
</name>
<age>
18
</age>
<favorite>
reading
</favorite>
</student>
````````````````````````````````````````````````
顯示student標簽中索引大於1的元素：<student id="3">
<name>
javagirl
</name>
<age>
17
</age>
<favorite>
sleep
</favorite>
</student>
<student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test">
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
````````````````````````````````````````````````
顯示student標簽中第二個：<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
````````````````````````````````````````````````
顯示student包含至少一個kc：<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
````````````````````````````````````````````````
顯示student中不包含kc的元素：<student id="1" class="red" major="java">
<name color="pink">
陳夢凡
</name>
<age>
18
</age>
<favorite>
reading
</favorite>
</student>
<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
<student id="3">
<name>
javagirl
</name>
<age>
17
</age>
<favorite>
sleep
</favorite>
</student>
<student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test">
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
````````````````````````````````````````````````
查找包含文本java的student個元素。：<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
<student id="3">
<name>
javagirl
</name>
<age>
17
</age>
<favorite>
sleep
</favorite>
</student>
<student>
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test">
<name>
javagirl2
</name>
<age>
178
</age>
<favorite>
sleep2
</favorite>
</student>
<student id="test1" class="te">
<name>
javagir43
</name>
<age>
11
</age>
<kc>
lllll
</kc>
<favorite>
oooo
</favorite>
</student>
````````````````````````````````````````````````
查找包含文本java的student個元素。：<student id="2">
<name>
javaboy
</name>
<age>
18
</age>
<favorite>
programming
</favorite>
</student>
````````````````````````````````````````````````
查找包含kc的元素：<kc>
lllll
</kc>

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