Parse any date in Java

user_32140 0
Viewed 48558

I know this question is asked quite a bit, and obviously you can't parse any arbitrary date. However, I find that the python-dateutil library is able to parse every date I throw at it, all while requiring absolutely zero effort in figuring out a date format string. Joda time is always sold as being a great Java date parser, but it still requires you to decide what format your date is in before you pick a Format (or create your own). You can't just call DateFormatter.parse(mydate) and magically get a Date object back.

For example, the date "Wed Mar 04 05:09:06 GMT-06:00 2009" is properly parsed with python-dateutil:

import dateutil.parser
print dateutil.parser.parse('Wed Mar 04 05:09:06 GMT-06:00 2009')

but the following Joda time call doesn't work:

    String date = "Wed Mar 04 05:09:06 GMT-06:00 2009";
    DateTimeFormatter fmt = ISODateTimeFormat.dateTime();
    DateTime dt = fmt.parseDateTime(date);
    System.out.println(date);

And creating your own DateTimeFormatter defeats the purpose, since that seems to be the same as using SimpleDateFormatter with the correct format string.

Is there a comparable way to parse a date in Java, like python-dateutil? I don't care about errors, I just want it to mostly perfect.

date java
6 Answers

You could try dateparser.

It can recognize any String automatically, and parse it into Date, Calendar, LocalDateTime, OffsetDateTime correctly and quickly(1us~1.5us).

It doesn't based on any natural language analyzer or SimpleDateFormat or regex.Pattern.

With it, you don't have to prepare any appropriate patterns like yyyy-MM-dd'T'HH:mm:ss.SSSZ or yyyy-MM-dd'T'HH:mm:ss.SSSZZ:

Date date = DateParserUtils.parseDate("2015-04-29T10:15:00.500+0000");
Calendar calendar = DateParserUtils.parseCalendar("2015-04-29T10:15:00.500Z");
LocalDateTime dateTime = DateParserUtils.parseDateTime("2015-04-29 10:15:00.500 +00:00");

All works fine, please enjoy it.

user_59329760 
//download library:   org.ocpsoft.prettytime.nlp.PrettyTimeParser
String str = "2020.03.03";
Date date = new PrettyTimeParser().parseSyntax(str).get(0).getDates().get(0);
System.out.println(date)
user_105934310

I have no idea about this parsing how to do in python. In java we can do like this

SimpleDateFormat sdf1 = new SimpleDateFormat("dd-MM-yyyy");
  java.util.Date normalDate = null;
  java.sql.Date sqlDate = null;
  normalDate = sdf1.parse(date);
  sqlDate = new java.sql.Date(normalDate.getTime());
  System.out.println(sqlDate);

i think like java some predefined functions will be there in python. You can follow this method. This methods parse the String date to Sql Date (dd-MM-yyyy);

import java.text.SimpleDateFormat;
import java.text.ParseException;
public class HelloWorld{
     public static void main(String []args){
        String date ="26-12-2019";
         SimpleDateFormat sdf1 = new SimpleDateFormat("dd-MM-yyyy");
        java.util.Date normalDate = null;
        java.sql.Date sqlDate = null;
        if( !date.isEmpty()) {
            try {
                normalDate = sdf1.parse(date);
                sqlDate = new java.sql.Date(normalDate.getTime());
                System.out.println(sqlDate);
            } catch (ParseException e) {
            }
        }
     }
}

execute this!

user_125840710
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