import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.TimeZone;

/**

 * @author 王睿

 * @date 2019-01-24 14:32

 */

public class TimeFormat {

    public static void main(String[] args) throws ParseException {

        String text = "2019-01-03T08:26:15.503162206Z";

        text = "2019-01-03T08:26:15Z";

        Date date = parseUTCText(text);

        System.out.println(date);

    }

    /**

     * @param text 时间字符串，格式支持两种

     *             1、不包含毫秒值，如"2019-01-03T08:26:15Z"；

     *             2、支持任意位数的毫秒值：2019-01-03T08:26:15.503162206Z；

     *             转换出来的Date类型精度知道毫秒位

     * @return

     * @throws ParseException

     */

    public static Date parseUTCText(String text) throws ParseException {

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");

        sdf.setTimeZone(TimeZone.getTimeZone("UTC"));

        if (text.indexOf(".") > -1) {

            String prefix = text.substring(0, text.indexOf("."));

            String suffix = text.substring(text.indexOf("."));

            if (suffix.length() >= 5) {

                suffix = suffix.substring(0, 4) + "Z";

            } else {

                int len = 5 - suffix.length();

                String temp = "";

                temp += suffix.substring(0, suffix.length() - 1);

                for (int i = 0; i < len; i++) {

                    temp += "0";

                }

                suffix = temp + "Z";

            }

            text = prefix + suffix;

        } else {

            text = text.substring(0, text.length() - 1) + ".000Z";

        }

        Date date = sdf.parse(text);

        return date;

    }

}