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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 获取网页的发布时间

?*/

public class FetchPubTime {

????/** 表示url中连续的8位日期，例如http://www.baidu.com/20140311/2356.html */

????private static String url_reg_whole= "([-|/|_]{1}20\\d{6})";

????/** 表示 用-或者/隔开的日期,有年月日的，例如 http://www.baidu.com/2014-3-11/2356.html? */

????private static String url_reg_sep_ymd = "([-|/|_]{1}20\\d{2}[-|/|_]{1}\\d{1,2}[-|/|_]{1}\\d{1,2})";

????/** 表示 用-或者/隔开的日期,只有年和月份的，例如 http://www.baidu.com/2014-3/2356.html? */

????private static String url_reg_sep_ym = "([-|/|_]{1}20\\d{2}[-|/|_]{1}\\d{1,2})";

????private static Calendar current = Calendar.getInstance();

????/** 格式正确的时间正则表达式*/

????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);

?????????

??????//链接里面没有，匹配文本中的

????????if(pubTime == null)

????????{

????????????if(urlContent!=null&&!urlContent.trim().equals(""))

????????????????return extractPageDate(urlContent);

????????}

?????????

????????return pubTime;

????}

?????

????/**从url里面抽取出发布时间，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());

???????????//每一步都不能够超出当前时间?????????

????????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 =? m_sep.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_sep_ym.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;

????}