java正则表达式去除html中所有的标签和特殊HTML字符（以&开头的）

来源于：https://www.androiddev.net/java%E6%AD%A3%E5%88%99%E8%A1%A8%E8%BE%BE%E5%BC%8F%E5%8E%BB%E9%99%A4html%E4%B8%AD%E6%89%80%E6%9C%89%E7%9A%84%E6%A0%87%E7%AD%BE%E5%92%8C%E7%89%B9%E6%AE%8Ahtml%E5%AD%97%E7%AC%A6%EF%BC%88%E4%BB%A5/

package com.comcons.utils;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Pattern;

public class ReduceHtml2Text {

/**
* 删除Html标签
* @param inputString
* @return
*/
public static String removeHtmlTag(String inputString) {
if (inputString == null)
return null;
String htmlStr = inputString; // 含html标签的字符串
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：&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
String regEx_special = "\&[a-zA-Z]{1,10};";

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

/**
* 测试用的main函数
* @param args
*/
public static void main(String[] args) {
StringBuffer sb = new StringBuffer();
try {
FileReader fr = new FileReader("D:/test.html");
BufferedReader br = new BufferedReader(fr);
String s = "";
while((s = br.readLine())!=null){
sb.append(s);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String ssss = ReduceHtml2Text.removeHtmlTag(sb.toString());
System.out.println(ssss);
}
}