Java用正则表达式如何读取网页内容

  package com.xiaofeng.picup;  import java.io.BufferedReader;  import java.io.IOException;  import java.io.InputStreamReader;  import java.net.MalformedURLException;  import java.net.URL;  import java.util.ArrayList;  import java.util.HashMap;  import java.util.List;  import java.util.regex.Matcher;  import java.util.regex.Pattern;  /** *//**  *  * @抓取页面文章标题及内容（测试） 手动输入网址抓取，可进一步自动抓取整个页面的全部内容  *  */  public class WebContent ...{    /** *//**     * 读取一个网页全部内容     */    public String getOneHtml(String htmlurl) throws IOException...{      URL url;      String temp;      StringBuffer sb = new StringBuffer();      try ...{        url = new URL(htmlurl);        BufferedReader in = new BufferedReader(new InputStreamReader(url            .openStream(), "utf-8"));// 读取网页全部内容        while ((temp = in.readLine()) != null) ...{          sb.append(temp);        }        in.close();      }catch(MalformedURLException me)...{        System.out.println("你输入的URL格式有问题！请仔细输入");        me.getMessage();        throw me;      }catch (IOException e) ...{        e.printStackTrace();        throw e;      }      return sb.toString();    }    /** *//**     *     * @param s     * @return 获得网页标题     */    public String getTitle(String s) ...{      String regex;      String title = "";      List<String> list = new ArrayList<String>();      regex = "<title>.*?</title>";      Pattern pa = Pattern.compile(regex, Pattern.CANON_EQ);      Matcher ma = pa.matcher(s);      while (ma.find()) ...{        list.add(ma.group());      }      for (int i = 0; i < list.size(); i++) ...{        title = title + list.get(i);      }      return outTag(title);    }    /** *//**     *     * @param s     * @return 获得链接     */    public List<String> getLink(String s) ...{      String regex;      List<String> list = new ArrayList<String>();      regex = "<a[^>]*href=("([^"]*)"|'([^']*)'|([^s>]*))[^>]*>(.*?)</a>";      Pattern pa = Pattern.compile(regex, Pattern.DOTALL);      Matcher ma = pa.matcher(s);      while (ma.find()) ...{        list.add(ma.group());      }      return list;    }    /** *//**     *     * @param s     * @return 获得脚本代码     */    public List<String> getScript(String s) ...{      String regex;      List<String> list = new ArrayList<String>();      regex = "<script.*?</script>";      Pattern pa = Pattern.compile(regex, Pattern.DOTALL);      Matcher ma = pa.matcher(s);      while (ma.find()) ...{        list.add(ma.group());      }      return list;    }    /** *//**     *     * @param s     * @return 获得CSS     */    public List<String> getCSS(String s) ...{      String regex;      List<String> list = new ArrayList<String>();      regex = "<style.*?</style>";      Pattern pa = Pattern.compile(regex, Pattern.DOTALL);      Matcher ma = pa.matcher(s);      while (ma.find()) ...{        list.add(ma.group());      }      return list;    }    /** *//**     *     * @param s     * @return 去掉标记     */    public String outTag(String s) ...{      return s.replaceAll("<.*?>", "");    }