Java Regex Time Validate parseTimestamp(String s)

Description

parse Timestamp

License

Open Source License

Declaration

public static long parseTimestamp(String s) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.concurrent.TimeUnit;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static final Pattern TIMESTAMP_PATTERN = Pattern.compile(
            "(-?\\d+)\\s*((?:d(?:ay(?:s)?)?)|(?:h(?:our(?:s)?)?)|(?:m(?:in(?:ute(?:s)?)?)?)|(?:s(?:ec(?:ond(?:s)?)?)?))?");

    public static long parseTimestamp(String s) {
        s = s.toLowerCase();/*from   w w  w .  j  a v  a 2s  .  c om*/
        long ms = 0;

        Matcher matcher = TIMESTAMP_PATTERN.matcher(s);

        while (matcher.find()) {
            String numStr = matcher.group(1);
            String unitStr = matcher.group(2);

            TimeUnit unit;
            if (unitStr == null) {
                unit = TimeUnit.SECONDS;
            } else
                switch (unitStr) {
                case "d":
                case "day":
                case "days":
                    unit = TimeUnit.DAYS;
                    break;
                case "h":
                case "hour":
                case "hours":
                    unit = TimeUnit.HOURS;
                    break;
                case "m":
                case "min":
                case "minute":
                case "minutes":
                    unit = TimeUnit.MINUTES;
                    break;
                case "s":
                case "sec":
                case "second":
                case "seconds":
                default:
                    unit = TimeUnit.SECONDS;
                    break;
                }
            ms += unit.toMillis(Long.parseLong(numStr));
        }
        return ms;
    }
}

Related

1. parseTimeOffset(String s)
2. parseTimePeriod(String period)
3. parseTimePeriod(String s)
4. parseTimeSpan(String timeSpan)
5. parseTimestamp(final String value)
6. parseTimeString(String str)
7. parseTimeString(String str, TimeUnit unit)
8. parseTimeString(String time)