package com.test.util;

import java.util.regex.Pattern;

public class HtmlUtil {
        /**
     * 去除所有HTML标签
     * @param inputString
     * @return
     */
    public static String removeHtmlTag(String inputString) {
        if (inputString == null){
            return null;
        } else {
            // 含html标签的字符串
            String htmlStr = inputString; 
            String textStr = "";
            java.util.regex.Pattern p_script;
            java.util.regex.Matcher m_script;
            java.util.regex.Pattern p_style;
            java.util.regex.Matcher m_style;
            java.util.regex.Pattern p_html;
            java.util.regex.Matcher m_html;
            java.util.regex.Pattern p_special;
            java.util.regex.Matcher m_special;
            try {
                //定义script的正则表达式{或<script[^>]*?>[\\s\\S]*?<\\/script>
                String regEx_script = "<[\\s]*?script[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?script[\\s]*?>";
                //定义style的正则表达式{或<style[^>]*?>[\\s\\S]*?<\\/style>
                String regEx_style = "<[\\s]*?style[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?style[\\s]*?>";
                // 定义HTML标签的正则表达式
                String regEx_html = "<[^>]+>";
                // 定义一些特殊字符的正则表达式 如：     
                String regEx_special = "\\&[a-zA-Z]{1,10};";

                p_script = Pattern.compile(regEx_script, Pattern.CASE_INSENSITIVE);
                m_script = p_script.matcher(htmlStr);
                // 过滤script标签
                htmlStr = m_script.replaceAll(""); 
                p_style = Pattern.compile(regEx_style, Pattern.CASE_INSENSITIVE);
                m_style = p_style.matcher(htmlStr);
                // 过滤style标签
                htmlStr = m_style.replaceAll(""); 
                p_html = Pattern.compile(regEx_html, Pattern.CASE_INSENSITIVE);
                m_html = p_html.matcher(htmlStr);
                // 过滤html标签
                htmlStr = m_html.replaceAll(""); 
                p_special = Pattern.compile(regEx_special, Pattern.CASE_INSENSITIVE);
                m_special = p_special.matcher(htmlStr);
                // 过滤特殊标签
                htmlStr = m_special.replaceAll(""); 
                textStr = htmlStr;
            } catch (Exception e) {
                e.printStackTrace();
            }

            return textStr;
        }
    }
}