57 lines
1.8 KiB
Java
57 lines
1.8 KiB
Java
package info.nightscout.utils;
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import java.text.DateFormat;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.TimeZone;
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/**
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* The Class DateUtil. A simple wrapper around SimpleDateFormat to ease the handling of iso date string <-> date obj
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* with TZ
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*/
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public class DateUtil {
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/**
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* The date format in iso.
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*/
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public static String FORMAT_DATE_ISO = "yyyy-MM-dd'T'HH:mm:ss'Z'";
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/**
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* Takes in an ISO date string of the following format:
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* yyyy-mm-ddThh:mm:ss.ms+HoMo
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*
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* @param isoDateString the iso date string
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* @return the date
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* @throws Exception the exception
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*/
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public static Date fromISODateString(String isoDateString)
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throws Exception {
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SimpleDateFormat f = new SimpleDateFormat(FORMAT_DATE_ISO);
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f.setTimeZone(TimeZone.getTimeZone("UTC"));
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Date date = f.parse(isoDateString);
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return date;
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}
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/**
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* Render date
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*
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* @param date the date obj
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* @param format - if not specified, will use FORMAT_DATE_ISO
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* @param tz - tz to set to, if not specified uses local timezone
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* @return the iso-formatted date string
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*/
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public static String toISOString(Date date, String format, TimeZone tz) {
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if (format == null) format = FORMAT_DATE_ISO;
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if (tz == null) tz = TimeZone.getDefault();
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DateFormat f = new SimpleDateFormat(format);
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f.setTimeZone(tz);
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return f.format(date);
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}
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public static String toISOString(Date date) {
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return toISOString(date, FORMAT_DATE_ISO, TimeZone.getTimeZone("UTC"));
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}
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public static String toISOString(long date) {
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return toISOString(new Date(date), FORMAT_DATE_ISO, TimeZone.getTimeZone("UTC"));
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}
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} |