使用正则表达式抽取新闻/BBS网页发表时间(修改版)

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
* 分析时间戳
*
* @author xum
*
*/
public class PublishTimeExtract {

private static final String TIME_REGEX = "((:|>|\\s)?20[0-9]{2}(-|/|\\.|\\u5e74)\\d{1,2}(-|/|\\.|\\u6708)\\d{1,2}(\\u65e5)?\\s?\\d{1,2}(:|\\u65f6)\\d{2}((:|\\u5206)\\d{2})?|(:|>|\\s)?[0-9]{2}\\u5e74\\d{1,2}\\u6708\\d{1,2}(\\u65e5)?\\s?\\d{1,2}(:|\\u65f6)\\d{2}((:|\\u5206)\\d{2})?)";
private static final String TIME_REGEX_1 = "((:|>|\\s)?20[0-9]{2}(-|/|\\.|\\u5e74)\\d{1,2}(-|/|\\.|\\u6708)\\d{1,2}(\\u65e5)?(\\s| |<)+|(:|>|\\s)?[0-9]{2}\\u5e74\\d{1,2}\\u6708\\d{1,2}(\\u65e5)?(\\s| |<)+)";
private static Pattern pattern = Pattern.compile(TIME_REGEX);
private static Pattern pattern1 = Pattern.compile(TIME_REGEX_1);
private static SimpleDateFormat sdf = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
private static final String BBS_URL = "(http://bbs/\\..*|http://www\\.tianya\\.cn/[a-zA-Z]*forum/content/.*)";

/**
* @param content
* @param url
* @return
*/
public static String extractDate(String content, String url) {

String con = content
.replaceAll("<!--.*?-->", "");

Matcher m = pattern.matcher(con);
Date now = new Date();

//
if (url.matches(BBS_URL)) {

String dateStr = null;

Date date = null;

while (m.find()) {

dateStr = m.group();

if (dateStr == null)
continue;

dateStr = dateStr.trim().replaceAll(">", "");

if (dateStr.startsWith(":")) {
dateStr = dateStr.replaceFirst(":", "");
}

dateStr = dateStr.replaceAll("\\.|/|\\u5e74|\\u6708", "-")
.replaceAll("\\u65e5", " ");

dateStr = dateStr.replaceAll("\\u65f6|\\u5206", ":");

Date tempDate;

try {
tempDate = sdf.parse(changeString2Date(dateStr));

if (tempDate.after(now)) {
continue;
}

} catch (ParseException e) {
continue;
}

if (date == null) {
date = tempDate;
} else if (tempDate.after(date)) {
date = tempDate;
}
}

if (date != null) {

return date.getTime() + "";
}

} else {

String dateStr = null;

if (m.find()) {
dateStr = m.group();
}

if (dateStr != null) {

dateStr = dateStr.trim().replaceAll(">", "");

if (dateStr.startsWith(":")) {
dateStr = dateStr.replaceFirst(":", "");
}

dateStr = dateStr.replaceAll("\\.|/|\\u5e74|\\u6708", "-")
.replaceAll("\\u65e5", " ");
;
dateStr = dateStr.replaceAll("\\u65f6|\\u5206", ":");

try {

return (sdf.parse(changeString2Date(dateStr)).getTime())
+ "";

} catch (ParseException e) {
System.out
.println("=======================>parsedate error: "
+ e.getMessage());
return (new Date()).getTime() + "";
}
}
}

m = pattern1.matcher(con);

if (url.matches(BBS_URL)) {

String dateStr = null;

Date date = null;

while (m.find()) {

dateStr = m.group();

if (dateStr == null)
continue;

dateStr = dateStr.trim().replaceAll(">", "");

if (dateStr.startsWith(":")) {
dateStr = dateStr.replaceFirst(":", "");
}

dateStr = dateStr.replaceAll("\\.|/|\\u5e74|\\u6708", "-")
.replaceAll("\\u65e5", " ");

dateStr = dateStr.replaceAll("( |<)", "");

Date tempDate;

try {
tempDate = sdf.parse(changeString2Date(dateStr));

if (tempDate.after(now)) {
continue;
}

} catch (ParseException e) {
continue;
}

if (date == null) {
date = tempDate;
} else if (tempDate.after(date)) {
date = tempDate;
}
}

if (date != null) {

return date.getTime() + "";
}

} else {

String dateStr = null;

if (m.find()) {
dateStr = m.group();
}

if (dateStr != null) {

dateStr = dateStr.trim().replaceAll(">", "");

if (dateStr.startsWith(":")) {
dateStr = dateStr.replaceFirst(":", "");
}

dateStr = dateStr.replaceAll("\\.|/|\\u5e74|\\u6708", "-")
.replaceAll("\\u65e5", " ");
;
dateStr = dateStr.replaceAll("( |<)", "");

try {

return (sdf.parse(changeString2Date(dateStr)).getTime())
+ "";

} catch (ParseException e) {
System.out
.println("=======================>parsedate error: "
+ e.getMessage());
return (new Date()).getTime() + "";
}
}
}

return (new Date()).getTime() + "";
}

private static String changeString2Date(String dateStr) {

System.out.println("=======================>Pre Date: " + dateStr);

String date = "";

String[] tempDateStr = dateStr.trim().replaceAll("\\s+", "@")
.replaceAll("(-|:)", "@").split("@");

if (tempDateStr.length > 0) {

String year = tempDateStr[0];

if (year.length() == 2) {
year = "20" + year;
}

date = date + year + "-";
}

if (tempDateStr.length > 1) {
date = date
+ (tempDateStr[1].length() > 1 ? tempDateStr[1] : "0"
+ tempDateStr[1]) + "-";
}

if (tempDateStr.length > 2) {
date = date
+ (tempDateStr[2].length() > 1 ? tempDateStr[2] : "0"
+ tempDateStr[2]) + " ";
}

if (tempDateStr.length > 3) {
date = date
+ (tempDateStr[3].length() > 1 ? tempDateStr[3] : "0"
+ tempDateStr[3]) + ":";
} else {
date = date + "00:";
}

if (tempDateStr.length > 4) {
date = date
+ (tempDateStr[4].length() > 1 ? tempDateStr[4] : "0"
+ tempDateStr[4]) + ":";
} else {
date = date + "00:";
}

if (tempDateStr.length > 5) {
date = date
+ (tempDateStr[5].length() > 1 ? tempDateStr[5] : "0"
+ tempDateStr[5]);
} else {
date = date + "00";
}

System.out.println("=======================> Date: " + date);

return date;
}

public static void main(String[] args) {

extractDate(
" <td align=\"center\">http://www.rednet.cn  <!--时间开始-->2012/3/2 9:14:36<!--时间结束-->  ",
"");

}