# 處理 Html 標籤
###### tags: `Java` `Jsoup` `html`
[TOC]

## Remove HTML tag
1. 正則表達式
2. 使用 javax.swing.text.html.HTMLEditorKit
3. 使用 Jsoup 框架

## Get Title From HTML
### Jsoup
獲取HTML文檔

import org.jsoup.Jsoup;  
import org.jsoup.nodes.Document;  
public class Example{  
    public static void main( String[] args ) {  
                Document document = Jsoup.connect("https://www.google.com").get();  
                System.out.println("title:  " + document.title());  
    }  
}

#### :triangular_flag_on_post: 請求的網站有SSL加密，因而產生錯誤
:::danger
javax.net.ssl.SSLHandshakeException: **PKIX path validation failed: java.security.cert.CertPathValidatorException: validity check failed**
Caused by: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: validity check failed
Caused by: java.security.cert.CertPathValidatorException: validity check failed
Caused by: java.security.cert.CertificateExpiredException: NotAfter: Sat Nov 12 23:59:59 CST 2016
:::

參考資料：
[官方](https://www.javatpoint.com/jsoup-example-print-links-of-an-url)
[Jsoup示例：提取給定url的標題](https://www.1ju.org/jsoup/print-title-of-an-url)
[Jsoup Get Title From HTML](https://www.w3schools.blog/jsoup-get-title-from-html-example)