DateUtil.java Source code

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Here is the source code for DateUtil.java

Source

//package org.nestframework.commons.utils;

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

public class DateUtil {
    public static long dateToLong(Date date) {
        return date.getTime();
    }

    public static Date longToDate(long longdata) {
        return new Date(longdata);
    }

    /**
     * Format data to string with specified style.
     * 
     * @param dtmDate
     *            Date
     * @param num
     *            style. 1:YYYY.MM.DD 2:hh:mm:ss 3:YYYY.MM.DD HH:MM:ss
     *            4:YYYY-MM-DD 5:YYYY 6:MM 7:DD
     * @return dateString String
     */
    public static String dateToStr(java.util.Date dtmDate, int num) {
        if (dtmDate == null)
            return "";
        String f;
        switch (num) {
        case 1:
            f = "yyyy.MM.dd";
            break;
        case 2:
            f = "kk:mm:ss";
            break;
        case 3:
            f = "yyyy.MM.dd kk:mm:ss";
            break;
        case 4:
            f = "yyyy-MM-dd";
            break;
        case 5:
            f = "yyyy";
            break;
        case 6:
            f = "MM";
            break;
        case 7:
            f = "dd";
            break;
        default:
            f = "yyyy.MM.dd kk:mm:ss";
        }
        SimpleDateFormat sdf = new SimpleDateFormat(f);
        String dateString = sdf.format(dtmDate);
        return dateString;
    }

    /**
     * Format data to string.
     * 
     * @param dtmDate
     *            Date
     * @param formatstr
     *            format
     * @return dateString String
     */
    public static String dateToStr(java.util.Date dtmDate, String formatstr) {
        SimpleDateFormat sdf = new SimpleDateFormat(formatstr);
        String dateString = sdf.format(dtmDate);
        return dateString;
    }

    /**
     * Normal data format.
     * 
     * @return String[]
     */
    private static String[] getdateformat() {
        String[] formatstring = { "yyyy-MM-dd", "yyyy/MM/dd", "yyyy.MM.dd" };
        return formatstring;
    }

    /**
     * Parse String to Date.
     * 
     * @param dateString
     *            String of Date, the format is yyyy-MM-dd or yyyy/MM/dd or
     *            yyyy.MM.dd
     * @return Date
     * @throws ParseException
     */
    public static Date stringToDate(String dateString) throws ParseException {
        String[] formatstring = getdateformat();
        int index = 0;
        Date parseDate = null;
        ParseException throwe = null;
        SimpleDateFormat sdf = new SimpleDateFormat();

        while (formatstring != null && index < formatstring.length) {
            try {
                sdf.applyPattern(formatstring[index]);
                index++;
                parseDate = sdf.parse(dateString);
                break;
            } catch (ParseException gete) {
                throwe = gete;
                continue;
            }
        }
        if (parseDate == null)
            throw throwe;
        return parseDate;
    }

}