Java SQL Time Create getSystemTimeGMTToday()

Description

get System Time GMT Today

License

Open Source License

Declaration

public static long getSystemTimeGMTToday() 

Method Source Code

//package com.java2s;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;
import java.text.*;
import java.util.Calendar;

import java.util.TimeZone;

public class Main {
    public static final String DEFAULT_DATE_YMD_FORMAT = "yyyy-MM-dd";
    public static final String DEFAULT_TIMESTAMP_FORMAT = "yyyy-MM-dd HH:mm:ss.SSS";
    public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";

    public static long getSystemTimeGMTToday() {

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        sdf.setTimeZone(TimeZone.getTimeZone("GMT"));

        Timestamp today = toTimestamp(sdf.format(Calendar.getInstance().getTime()) + " 00:00:00");

        return toGMTTime(today);
    }/* w w  w. j  a va2 s  .c  o m*/

    public static Timestamp toTimestamp(String str) {

        if (str == null) {
            return null;
        }

        try {
            return Timestamp.valueOf(str.trim());
        } catch (IllegalArgumentException iae) {
            return null;
        }

    }

    public static Timestamp toTimestamp(String str, String format) {

        if (str == null) {
            return null;
        }

        try {
            return new Timestamp(parseDate(str, format).getTime());
        } catch (Exception e) {
            return null;
        }

    }

    public static long toGMTTime(long local) {

        SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_TIMESTAMP_FORMAT);
        sdf.setTimeZone(TimeZone.getTimeZone("GMT"));

        ParsePosition pos = new ParsePosition(0);
        java.util.Date date = sdf.parse(new Timestamp(local).toString(), pos);

        if (date == null) {
            return -1;
        }

        return date.getTime();
    }

    public static long toGMTTime(Timestamp local) {

        if (local == null) {
            return -1;
        }

        return toGMTTime(local.getTime());
    }

    public static java.util.Date parseDate(String value, String pattern) {
        try {
            TimeZone tz = TimeZone.getDefault();
            String dateFormat = pattern;
            SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
            sdf.setTimeZone(tz);

            // Parse date
            java.util.Date parsed = null;

            parsed = sdf.parse(value);
            return parsed;
        } catch (ParseException e) {
            return null;
        }
    }

    public static String toString(Date date) {
        return toString((java.util.Date) date);
    }

    public static String toString(java.util.Date date) {
        return toString(date, DEFAULT_DATE_YMD_FORMAT);
    }

    public static String toString(Date date, String format) {
        return toString((java.util.Date) date, format);
    }

    public static String toString(java.util.Date date, String format) {

        if (date == null) {
            return null;
        }

        if (format == null) {
            throw new IllegalArgumentException("The value of an argument is inaccurate.");
        }

        SimpleDateFormat sdf = new SimpleDateFormat(format);

        return sdf.format(date);
    }

    public static String toString(Time time, String format) {

        if (time == null) {
            return null;
        }

        if (format == null) {
            throw new IllegalArgumentException("The value of an argument is inaccurate.");
        }

        SimpleDateFormat sdf = new SimpleDateFormat(format);

        return sdf.format(time);
    }

    public static String toString(Time time) {
        return toString(time, DEFAULT_TIME_FORMAT);
    }
}

Related

1. getSQLTime(String value)
2. getSQLTimeFromString(String s)
3. getSqlTimeFromTimeNumber(int time)
4. getSysDateTimeMillis()
5. getSystemCurrentTimeMillis()
6. getSysTime()
7. getThisWeekStartTime()
8. getTime()
9. getTime()