DateUtil.java

// Copyright (c) 2011, Chute Corporation. All rights reserved.
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package com.chute.sdk.v2.utils;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class DateUtil {

  /** The date format in ISO. */
  public static String FORMAT_DATE_ISO = "yyyy-MM-dd'T'HH:mm:ss'Z'";

  /**
   * Takes in an ISO date string of the following format:
   * yyyy-mm-ddThh:mm:ss.ms+HoMo
   * 
   * @param isoDateString
   *          the ISO date string
   * @return the date
   * @throws Exception
   *           the exception
   */
  public static Date fromISODateString(String isoDateString) throws Exception {
    DateFormat f = new SimpleDateFormat(FORMAT_DATE_ISO);
    f.setTimeZone(TimeZone.getTimeZone("Zulu"));
    return f.parse(isoDateString);
  }

  /**
   * Render date
   * 
   * @param date
   *          the date obj
   * @param format
   *          - if not specified, will use FORMAT_DATE_ISO
   * @param tz
   *          - tz to set to, if not specified uses local timezone
   * @return the ISO-formatted date string
   */
  public static String toISOString(Date date, String format, TimeZone tz) {
    if (format == null) {
      format = FORMAT_DATE_ISO;
    }
    if (tz == null) {
      tz = TimeZone.getTimeZone("Zulu");
    }
    DateFormat f = new SimpleDateFormat(format);
    f.setTimeZone(tz);
    return f.format(date);
  }

  public static String toISOString(Date date) {
    return toISOString(date, FORMAT_DATE_ISO, null);
  }
}