package com.sincere.file.utils;

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

public class HtmlUtil {
    private static final String regEx_script = "]*?>[//s//S]*?"; // 定义script的正则表达式

    private static final String regEx_style = "]*?>[//s//S]*?"; // 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

    }
}