java正則表達式去掉所有HTML標籤

package com.xz.cxzy.utils;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class HtmlUtil {
    private static final String regEx_script = "<script[^>]*?>[\\s\\S]*?<\\/script>"; // 定義script的正則表達式
    private static final String regEx_style = "<style[^>]*?>[\\s\\S]*?<\\/style>"; // 定義style的正則表達式
    private static final String regEx_html = "<[^>]+>"; // 定義HTML標籤的正則表達式
    private static final String regEx_space = "\\s*|\t|\r|\n";//定義空格回車換行符

    /**
     * @param htmlStr
     * @return
     *  刪除Html標籤
     */
    public static String delHTMLTag(String htmlStr) {
        Pattern p_script = Pattern.compile(regEx_script, Pattern.CASE_INSENSITIVE);
        Matcher m_script = p_script.matcher(htmlStr);
        htmlStr = m_script.replaceAll(""); // 過濾script標籤

        Pattern p_style = Pattern.compile(regEx_style, Pattern.CASE_INSENSITIVE);
        Matcher m_style = p_style.matcher(htmlStr);
        htmlStr = m_style.replaceAll(""); // 過濾style標籤

        Pattern p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE);
        Matcher m_html = p_html.matcher(htmlStr);
        htmlStr = m_html.replaceAll(""); // 過濾html標籤

        Pattern p_space = Pattern.compile(regEx_space, Pattern.CASE_INSENSITIVE);
        Matcher m_space = p_space.matcher(htmlStr);
        htmlStr = m_space.replaceAll(""); // 過濾空格回車標籤
        return htmlStr.trim(); // 返回文本字符串
    }

    public static String getTextFromHtml(String htmlStr){
        htmlStr = delHTMLTag(htmlStr);
        htmlStr = htmlStr.replaceAll(" ", "");
        htmlStr = htmlStr.substring(0, htmlStr.indexOf("。")+1);
        return htmlStr;
    }

    public static void main(String[] args) {
        String str = "<div style='text-align:center;'> 整治“四風”   清弊除垢<br/><span style='font-size:14px;'> </span><span style='font-size:18px;'>公司召開黨的羣衆路線教育實踐活動動員大會</span><br/></div>";
        System.out.println(getTextFromHtml(str));
    }
}