java正则表达式解析html

package jun.qi.wang;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class HtmltoText {
 public static String HtmlToText(String inputString)
 {
           String htmlStr = inputString; //含html标签的字符串
           String textStr ="";
           Pattern p_script;
           Matcher m_script;
           Pattern p_style;
           Matcher m_style;
           Pattern p_html;
           Matcher m_html;
           Pattern p_spe;
           Matcher m_spe;
           Pattern p_blank;
           Matcher m_blank;
           Pattern p_table;
           Matcher m_table;
           Pattern p_enter;
           Matcher m_enter;
       
           try {
            String regEx_script = "<[\\s]*?script[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?script[\\s]*?>";
            //定义script的正则表达式.
            String regEx_style = "<[\\s]*?style[^>]*?>[\\s\\S]*?<[\\s]*?\\/[\\s]*?style[\\s]*?>";
            //定义style的正则表达式.
            String regEx_html = "<[^>]+>";
            //定义HTML标签的正则表达式
            String regEx_spe="\\&[^;]+;";
            //定义特殊符号的正则表达式
            String regEx_blank=" +";
            //定义多个空格的正则表达式
            String regEx_table="\t+";
            //定义多个制表符的正则表达式
            String regEx_enter="\n+";
            //定义多个回车的正则表达式
            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_spe = Pattern.compile(regEx_spe,Pattern.CASE_INSENSITIVE);
            m_spe = p_spe.matcher(htmlStr);
            htmlStr = m_spe.replaceAll(""); //过滤特殊符号
           
            p_blank = Pattern.compile(regEx_blank,Pattern.CASE_INSENSITIVE);
            m_blank = p_blank.matcher(htmlStr);
            htmlStr = m_blank.replaceAll(" "); //过滤过多的空格
           
            p_table = Pattern.compile(regEx_table,Pattern.CASE_INSENSITIVE);
            m_table = p_table.matcher(htmlStr);
            htmlStr = m_table.replaceAll(" "); //过滤过多的制表符
           
           p_enter = Pattern.compile(regEx_enter,Pattern.CASE_INSENSITIVE);
            m_enter = p_enter.matcher(htmlStr);
     
            htmlStr = m_enter.replaceAll(" "); //过滤过多的制表符
           
            textStr = htmlStr;
          
           }catch(Exception e)
           {
                 System.err.println("Html2Text: " + e.getMessage());
           }
       
           return textStr;//返回文本字符串
 }
 
 public static void main(String[] args)throws Exception{
  
  FileInputStream fis = new FileInputStream("f:\\UPGRADING-2.0.html");
  BufferedReader buff = new BufferedReader(new InputStreamReader(fis));
  String str = null;
  long lstart = System.currentTimeMillis();
  StringBuffer Sbuff = new StringBuffer();
  str = buff.readLine();
  while(str!=null){
   Sbuff.append(str+"\n");
   str = buff.readLine();
  }
  HtmlToText(Sbuff.toString());
  long lend = System.currentTimeMillis();
  System.out.println(lend-lstart);
  //System.out.println(HtmlToText(Sbuff.toString()));
 }
}