Java项目中的HTML标签怎么使用正则表达式进行删除

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[^>]*&#63;>[\\s\\S]*&#63;<\\/script>"; // 定义script的正则表达式
  private static final String regEx_style = "<style[^>]*&#63;>[\\s\\S]*&#63;<\\/style>"; // 定义style的正则表达式
  private static final String regEx_html = "<[^>]+>"; // 定义HTML标签的正则表达式
  private static final String regEx_space = "\\s*|\t|\r|\n";//定义空格回车换行符
  /**
   * @param htmlStr
   * @return
   * 删除Html标签
   */
  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(""); // 过滤script标签
    Pattern p_style = Pattern.compile(regEx_style, Pattern.CASE_INSENSITIVE);
    Matcher m_style = p_style.matcher(htmlStr);
    htmlStr = m_style.replaceAll(""); // 过滤style标签
    Pattern p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE);
    Matcher m_html = p_html.matcher(htmlStr);
    htmlStr = m_html.replaceAll(""); // 过滤html标签
    Pattern p_space = Pattern.compile(regEx_space, Pattern.CASE_INSENSITIVE);
    Matcher m_space = p_space.matcher(htmlStr);
    htmlStr = m_space.replaceAll(""); // 过滤空格回车标签
    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“四风”  清弊除垢<br/><span style='font-size:14px;'> </span><span style='font-size:18px;'>公司召开党的群众路线教育实践活动动员大会</span><br/></div>";
    System.out.println(getTextFromHtml(str));
  }
}