java does not parse for 'M dd, yyyy' date format

问题

I want to parse date strings like "February 7, 2011" using "M dd, yyyy" format. But I get an exception.

回答1:

Your parsing string is not correct as mentioned by others
To correctly parse February you need to use an english Locale or it may fail if your default Locale is not in English

DateFormat df = new SimpleDateFormat("MMM dd, yyyy", Locale.ENGLISH);
Date dt = df.parse("February 7, 2011");

回答2:

Try this code. I ran it with two dates "November 20, 2012" and "January 4, 1957" and got this output:

arg: November 20, 2012 date: Tue Nov 20 00:00:00 EST 2012
arg: January 4, 1957 date: Fri Jan 04 00:00:00 EST 1957

It works fine. Your regex was wrong.

package cruft;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * DateValidator
 * @author Michael
 * @since 12/24/10
 */
public class DateValidator {
    private static final DateFormat DEFAULT_FORMATTER;

    static {
        DEFAULT_FORMATTER = new SimpleDateFormat("MMM dd, yyyy");
        DEFAULT_FORMATTER.setLenient(false);
    }

    public static void main(String[] args) {
        for (String dateString : args) {
            try {
                System.out.println("arg: " + dateString + " date: " + convertDateString(dateString));
            } catch (ParseException e) {
                System.out.println("could not parse " + dateString);
            }
        }
    }

    public static Date convertDateString(String dateString) throws ParseException {
        return DEFAULT_FORMATTER.parse(dateString);
    }
}

回答3:

You will want to use "MMM dd, yyyy"

SimpleDateFormat("MMM dd, yyyy").parse("February 7, 2011")

See SimpleDateFormat

回答4:

Assuming you are using SimpleDateFormat, the month format is incorrect, it should be MMM dd, yyyy

MMM will match the long text format of the month:

String str = "February 7, 2011";
SimpleDateFormat format = new SimpleDateFormat("MMM dd, yyyy");
Date date = format.parse(str);

来源：https://stackoverflow.com/questions/12989446/java-does-not-parse-for-m-dd-yyyy-date-format

标签

java

date-format