Jsoup 예
Basically, Java provides different types of libraries to the user, in which jsoup maven is one of the libraries that are provided by Java. Jsoup normally is used while we need to work with the real-time HTML pages. Jsoup provides the different types of API to fetch the different URLs and manipulates them with the help of HTML5 DOM and a selector of CSS as per requirement. By using jsoup we perform a different operation or we can say that we can write the different programs for getting the title of a web page, get a number of links from a specific web page, get a number of images from the specified web pages and we can get the metadata of URL and HTML documents.
Jsoup Overview
Jsoup is an open-source Java library utilized essentially for separating information from HTML. It additionally permits you to control and yield HTML. It has a consistent improvement line, extraordinary documentation, and a familiar and adaptable API. Jsoup can likewise be utilized to parse and fabricate XML.
Jsoup loads the page HTML and constructs the related DOM tree. This tree works the same way as the DOM in a program, offering techniques like jQuery and vanilla JavaScript to choose the cross, control text/HTML/characteristics and add/eliminate components.
Different components of Jsoup are listed below as follows.
- Stacking: Bringing and parsing the HTML into a Document.
- Separating: Choosing the ideal information into Elements and navigating it.
- Removing: Getting properties, text, and HTML of hubs.
- Changing: Adding/altering/eliminating hubs and altering their traits.
All Jsoup Examples
Now let’s see all the examples jsoup one by one as follows.
Example #1
package demo; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; public class jsoup { public static void main(String[] args) { String html_code = "<html><head><title>Welcome</title></head>" + "<body><p>This is jsoup program</p></body></html>"; Document docu = Jsoup.parse(html_code); System.out.println(docu.title()); Elements para = docu.getElementsByTag("p"); for (Element paragraph : para) { System.out.println(paragraph.text()); } } }
Explanation
This is a simple program of Jsoup where we try to fetch the content of web pages, in the above example we write the string with HTML code and we try to fetch that string by using Jsoup library as shown in the above code. The end result of the above program we illustrated by using the following screenshot as follows.
Now let’s see the second example of Jsoup as follows.
Example #2
package com.sample; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import java.io.IOException; public class jsample { public static void main(String[] args) { Document docu; try { // required protocol that is http docu = Jsoup.connect("http://google.com").get(); // title of page String title_page = docu.title(); System.out.println("title : " + title_page); // links Elements links_web = docu.select("a[href]"); for (Element link : links_web) { // href attribute System.out.println("\n web_link : " + link.attr("href")); System.out.println("web_text : " + link.text()); } } catch (IOException e) { e.printStackTrace(); } } }
Explanation
By using the above code we try to find out the all hyperlinks of google.com. Here we first import the required packages and library as shown. After we write the code for HTTP protocol and how we can get the all hyperlinks for google.com as shown. The final output of the above program we illustrated by using the following screenshot as follows.
Now let’s see examples of images as follows.
Example #3
package demo; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import java.io.IOException; public class jsample { public static void main(String[] args) { Document docu; try { docu = Jsoup.connect("http://google.com").get(); Elements web_images = docu.select("img[src~=(?i)\\.(png|jpe?g|gif)]"); for (Element image : web_images) { System.out.println("\nsrc : " + image.attr("src")); System.out.println("Img_height : " + image.attr("height")); System.out.println("Img_width : " + image.attr("width")); System.out.println("Img_alt : " + image.attr("alt")); } } catch (IOException e) { e.printStackTrace(); } } }
Explanation
By using the above example, we try to fetch all sources of images, here we try to fetch the images of google.com as shown in the above code. After that, we write the code to fetch the height, width as shown. The final output of the above program we illustrated by using the following screenshot as follows.
Now let’s see the example of metadata as follows.
package demo; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; public class jsample { public static void main(String[] args) { StringBuffer html_code = new StringBuffer(); html_code.append("<!DOCTYPE html>"); html_code.append("<html lang=\"en\">"); html_code.append("<head>"); html_code.append("<meta charset=\"UTF-8\" />"); html_code.append("<title>Hollywood Life</title>"); html_code.append("<meta name=\"description\" content=\"New trends in entertainment news\" />"); html_code.append("<meta name=\"keywords\" content=\"Cricket News, Bollywood News, Football News\" />"); html_code.append("</head>"); html_code.append("<body>"); html_code.append("<div id='color'>Blue color is here</div> />"); html_code.append("</body>"); html_code.append("</html>"); Document docu = Jsoup.parse(html_code.toString()); //get a description of metadata content String des = docu.select("meta[name=description]").get(0).attr("content"); System.out.println("Meta description : " + des); //get keyword of metadata content String keyw = docu.select("meta[name=keywords]").first().attr("content"); System.out.println("Meta keyword : " + keyw); String color_A = docu.getElementById("color").text(); String color_B = docu.select("div#color").get(0).text(); System.out.println(color_A); System.out.println(color_B); } }
Explanation
By using the above code we try to implement the metadata in jsoup, here we write the HTML body and metadata and push by using the append function as shown. After that, we write the code for the metadata description and keyword of metadata. The final output of the above program we illustrated by using the following screenshot as follows.
Now let’s see how we can get icons as follows.
Example #4
package demo; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; public class jsample { public static void main(String[] args) { StringBuffer html_code = new StringBuffer(); html_code.append("<html lang=\"en\">"); html_code.append("<head>"); html_code.append("<link rel=\"icon\" href=\"http://specifiedurl.com/img.ico\" />"); html_code.append("</head>"); html_code.append("<body>"); html_code.append("something"); html_code.append("</body>"); html_code.append("</html>"); Document docu = Jsoup.parse(html_code.toString()); String fav = ""; Element ele = docu.head().select("link[href~=.*\\.(ico|png)]").first(); if(ele==null){ ele = docu.head().select("meta[itemprop=image]").first(); if(ele!=null){ fav = ele.attr("content"); } }else{ fav = ele.attr("href"); } System.out.println(fav); } }
Explanation
By using the above example we try to implement the get an icon in Jsoup, here we need to specify the URL of the website that we want. After that, we also need to mention the link tag of HTML as shown. The final output of the above program we illustrated by using the following screenshot as follows.
Conclusion – Jsoup Example
We hope from this article you learn more about the Jsoup example. From the above article, we have taken in the essential idea of the jsoup example. and we also see the representation and example of Jsoup examples. From this article, we learned how and when we use the Jsoup example.
위 내용은 Jsoup 예의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!

핫 AI 도구

Undresser.AI Undress
사실적인 누드 사진을 만들기 위한 AI 기반 앱

AI Clothes Remover
사진에서 옷을 제거하는 온라인 AI 도구입니다.

Undress AI Tool
무료로 이미지를 벗다

Clothoff.io
AI 옷 제거제

Video Face Swap
완전히 무료인 AI 얼굴 교환 도구를 사용하여 모든 비디오의 얼굴을 쉽게 바꾸세요!

인기 기사

뜨거운 도구

메모장++7.3.1
사용하기 쉬운 무료 코드 편집기

SublimeText3 중국어 버전
중국어 버전, 사용하기 매우 쉽습니다.

스튜디오 13.0.1 보내기
강력한 PHP 통합 개발 환경

드림위버 CS6
시각적 웹 개발 도구

SublimeText3 Mac 버전
신 수준의 코드 편집 소프트웨어(SublimeText3)

HTML의 테이블 테두리 안내. 여기에서는 HTML의 테이블 테두리 예제를 사용하여 테이블 테두리를 정의하는 여러 가지 방법을 논의합니다.

HTML의 Nested Table에 대한 안내입니다. 여기에서는 각 예와 함께 테이블 내에 테이블을 만드는 방법을 설명합니다.

HTML 여백-왼쪽 안내. 여기에서는 HTML margin-left에 대한 간략한 개요와 코드 구현과 함께 예제를 논의합니다.

HTML 테이블 레이아웃 안내. 여기에서는 HTML 테이블 레이아웃의 값에 대해 예제 및 출력 n 세부 사항과 함께 논의합니다.

HTML 입력 자리 표시자 안내. 여기서는 코드 및 출력과 함께 HTML 입력 자리 표시자의 예를 논의합니다.

HTML 순서 목록에 대한 안내입니다. 여기서는 HTML Ordered 목록 및 유형에 대한 소개와 각각의 예에 대해서도 설명합니다.

HTML onclick 버튼에 대한 안내입니다. 여기에서는 각각의 소개, 작업, 예제 및 다양한 이벤트의 onclick 이벤트에 대해 설명합니다.

HTML에서 텍스트 이동 안내. 여기서는 Marquee 태그가 구문과 함께 작동하는 방식과 구현할 예제에 대해 소개합니다.
