Java Parse Date parseDate(String dateStr)

Description

parse Date

License

Apache License

Declaration

public static Date parseDate(String dateStr) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.text.ParseException;
import java.text.SimpleDateFormat;

import java.util.Date;
import java.util.regex.Pattern;

public class Main {
    private final static Pattern DATE_PATTERN = Pattern.compile("\\d\\d\\d\\d-\\d\\d?-\\d\\d?");
    private final static String DATE_FORMAT = "yyyy-MM-dd";

    public static Date parseDate(String dateStr) {
        try {/*  w  ww .  j a va  2  s.c o m*/
            if (isValidDateString(dateStr)) {
                return (new SimpleDateFormat(DATE_FORMAT).parse(dateStr));
            } else if (dateStr.indexOf("T") > 0) {
                return (new SimpleDateFormat(DATE_FORMAT).parse(dateStr.substring(0, dateStr.indexOf('T'))));
            } else {
                return (new SimpleDateFormat(DATE_FORMAT).parse(dateStr.substring(0, dateStr.indexOf(" "))));
            }

        } catch (ParseException e) {
            throw new IllegalArgumentException("Invalid date format: " + dateStr, e);
        }
    }

    public static boolean isValidDateString(String dateStr) {
        return dateStr == null ? false : DATE_PATTERN.matcher(dateStr).matches();
    }
}

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