Java全栈工程师

2021/4/12 20:55:17

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package whu.extract.pubtime.core;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import whu.utils.TimeUtil;
/**

  • Created On 2014年3月13日 下午2:49:05
  • @description 獲取網頁的發佈時間
    /
    public class FetchPubTime {
    / 表示url中連續的8位日期,
    private static String url_regwhole= "([-|/|]{1}20\d{6})";
    /
    表示 用-或者/隔開的日期,有年月日的
    private static String url_reg_sepymd = "([-|/|]{1}20\d{2}[-|/|]{1}\d{1,2}[-|/|]{1}\d{1,2})";
    / 表示 用-或者/隔開的日期,只要年和月份的
    private static String url_reg_sepym = "([-|/|]{1}20\d{2}[-|/|_]{1}\d{1,2})";
    private static Calendar current = Calendar.getInstance();
    /
    格式正確的時間正則表達式
    /
    private static String rightTimeReg = "^((\d{2}(([02468][048])|([13579][26]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|([1-2][0-9])))))|(\d{2}(([02468][1235679])|([13579][01345789]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\s(((0?[0-9])|([1-2][0-3]))\:([0-5]?[0-9])((\s)|(\:([0-5]?[0-9])))))?$";

    /**

    • @param url
    • @param urlContent
    • @return
      */
      public static String getPubTimeVarious(String url,String urlContent) {

      String pubTime = getPubTimeFromUrl(url);

      //链接里面沒有,匹配文本中的
      if(pubTime == null)
      {
      if(urlContent!=null&&!urlContent.trim().equals(""))
      return extractPageDate(urlContent);
      }

      return pubTime;
      }

    /**從url里面抽取動身佈時間,返回YYYY-MM-DD HH:mm:ss格式的字符串

    • @param url
    • @return
      */
      public static String getPubTimeFromUrl(String url)
      {
      Pattern p_whole = Pattern.compile(url_reg_whole);
      Matcher m_whole = p_whole.matcher(url);
      if(m_whole.find(0)&&m_whole.groupCount()>0)
      {
      String time = m_whole.group(0);
      time = time.substring(1,time.length());
      //每一步都不可以超出當前時間
      if(current.compareTo(TimeUtil.strToCalendar(time, "yyyyMMdd"))>=0)
      {
      return time.substring(0,4)+"-"+time.substring(4,6)+"-"+
      time.substring(6,8)+" "+"00:00:00";
      }
      }

      p_whole = null;
      m_whole = null;
      Pattern p_sep = Pattern.compile(url_reg_sep_ymd);
      Matcher m_sep = p_sep.matcher(url);
      if(m_sep.find(0)&&m_sep.groupCount()>0)
      {
      String time = msep.group(0);
      time = time.substring(1,time.length());
      String[] seg = time.split("[-|/|
      ]{1}");
      Calendar theTime = Calendar.getInstance();
      theTime.set(Calendar.YEAR,Integer.parseInt(seg[0]));
      theTime.set(Calendar.MONTH, Integer.parseInt(seg[1]));
      theTime.set(Calendar.DAY_OF_MONTH, Integer.parseInt(seg[2]));
      if(current.compareTo(theTime)>=0)
      {

      return seg[0]+"-"+seg[1]+"-"+seg[2]+" "+"00:00:00";
          }

      }
      p_sep = null;
      m_sep = null;
      Pattern p_sep_ym = Pattern.compile(url_reg_sep_ym);
      Matcher m_sep_ym = p_sep_ym.matcher(url);
      if(m_sep_ym.find(0)&&m_sep_ym.groupCount()>0)
      {
      String time = m_sepym.group(0);
      time = time.substring(1,time.length());
      Calendar theTime = Calendar.getInstance();
      String[] seg = time.split("[-|/|
      ]{1}");
      theTime.set(Calendar.YEAR,Integer.parseInt(seg[0]));
      theTime.set(Calendar.MONTH, Integer.parseInt(seg[1]));
      theTime.set(Calendar.DAY_OF_MONTH, 1);
      if(current.compareTo(theTime)>=0)
      {

      return seg[0]+"-"+seg[1]+"-"+"01"+" "+"00:00:00";
      }

      }

      return null;
      }

    /** 從網頁源码中取動身佈時間

    • java中正則表達式提取字符串中日期完成代码
    • 2013年12月19日15:58:42
    • 讀取出2013-12-19 15:48:33或者2013-12-19或者2012/3/05方式的時間
    • @param text 待提取的字符串
    • @return 返回日期
    • @author: oschina
    • @Createtime: Jan 21, 2013
      */
      public static String extractPageDate(String text) {
      boolean containsHMS =false;
      String dateStr = text.replaceAll("r?n", " ");
      try {
      List matches = null;
      Pattern p_detail = Pattern.compile("(20\d{2}[-/]\d{1,2}[-/]\d{1,2} \d{1,2}:\d{1,2}:\d{1,2})|(20\d{2}年\d{1,2}月\d{1,2}日)", Pattern.CASE_INSENSITIVE|Pattern.MULTILINE);
      //假如是僅僅抽取年月日,則依照上面的,假如是抽取年月日-時分秒,則依照下面的
      Pattern p = Pattern.compile("(20\d{2}[-/]\d{1,2}[-/]\d{1,2})|(20\d{2}年\d{1,2}月\d{1,2}日)", Pattern.CASE_INSENSITIVE|Pattern.MULTILINE);
      //Matcher matcher = p.matcher(dateStr);
      Matcher matcher_detail = p_detail.matcher(dateStr);

      if(!(matcher_detail.find(0) && matcher_detail.groupCount() >= 1))
      {
          matcher_detail = p.matcher(dateStr);
          containsHMS  = true;
      }else
          matcher_detail = p_detail.matcher(dateStr);
      if (matcher_detail.find() && matcher_detail.groupCount() >= 1) {
          matches = new ArrayList();
          for (int i = 1; i <= matcher_detail.groupCount(); i++) {
              String temp = matcher_detail.group(i);
              matches.add(temp);
          }
      } else {
          matches = Collections.EMPTY_LIST;
      }           
      if (matches.size() > 0) {
          for(int i=0;i<matches.size();i++)
          {
              String pubTime = matches.get(i).toString().trim();
              //取出第一個值
              pubTime = pubTime.replace("/", "-").replace("年", "-").replace("月", "-").replace("日", "-");
              if(current.compareTo(TimeUtil.strToCalendar(pubTime, "yyyy-MM-dd"))>=0)
              {
                  if(containsHMS)
                      pubTime+=" "+"00:00:00";
                  if(pubTime.matches(rightTimeReg))
                  {
                      return pubTime;
                  }
              }
          }
      } else {
          return null;
      }

      } catch (Exception e) {
      return null;
      }
      return null;
      }
      }



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