Java end of the string to remove all labels br

/**
     * 剔除结尾的br-正则
     * @param cs 字符序列
     * @return 删除html标签后的字符序列
     */
    public static String replaceEndBrHtml(String cs){
        String rex = "^(.*)(<br/?>)$";
        Pattern comPile = Pattern.compile(rex);
        Matcher matcher = comPile.matcher(cs);
        while(matcher.find()){
            cs = matcher.group(1);
            matcher = comPile.matcher(cs);
        }
        return cs;
    }


 /**
 * 删除结尾的br
 * @param cs 字符序列
 * @return 删除html标签后的字符序列
 */
public static String deleteEndBrHtml(String cs){
    if(isEmpty(cs)){
        return "";
    }

    String s2 = cs.replaceAll("<br>", "~").replaceAll("<br/>", "~");
    if(s2.lastIndexOf("\"")>0){
        s2 = s2.substring(0,s2.length()-1);
    }
    int len = s2.length();
    int st = 0;
    char[] val = s2.toCharArray();
    while ((st < len) && (val[len - 1] == '~')) {
        len--;
    }
    String s3 = ((st > 0) || (len < s2.length())) ? s2.substring(st, len) : s2;
    String s4 = s3.replaceAll("~", "<br>");
    return s4;
}


/**
     * 删除所有br
     * @param cs 字符序列
     * @return 删除html标签后的字符序列
     */
    public static String deleteNotBrHtml(CharSequence cs){
        if(isEmpty(cs)){
            return "";
        }
        return Pattern.compile("<br([^>]*)>").matcher(cs).replaceAll("").replaceAll("</br>","");
    }