UTC时间转换北京时间yyyy-MM-dd'T'HH:mm:ss.SSS'Z'

public static void main(String args[]) throws ParseException {
    castUTC("2023-02-07T12:16:03.944Z", "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
}

public static void castUTC(String UTCStr, String format) throws ParseException {
    Date date = null;
    SimpleDateFormat sdf = new SimpleDateFormat(format);
    date = sdf.parse(UTCStr);
    System.out.println("UTC时间转换+8前: " + date);
    date = hourBefore2Object(8, "", date);
    System.out.println("UTC时间转换+8后: " + date);
    System.out.println("UTC时间转换+8后格式话: " + formatDate(date,"yyyy-MM-dd HH:mm:ss"));
}
/**
 * 得到日期字符串 默认格式（yyyy-MM-dd） pattern可以为："yyyy-MM-dd" "HH:mm:ss" "E"
 */
public static String formatDate(Date date, String pattern) {
    if (date == null || StringUtils.isBlank(pattern)) {
        return null;
    }
    return DateFormatUtils.format(date, pattern, Locale.SIMPLIFIED_CHINESE);
}
/**
 * 相对于当前日期的前几小时钟
 *
 * @param hours
 * @param format
 * @param instance
 */
public static <T> T hourBefore2Object(int hours, String format, T instance) {
    Calendar calendar = Calendar.getInstance();
    if (format == null || format.equals("")) {
        format = "yyyy-MM-dd HH:mm:ss";
    }
    if (instance instanceof Date) {
        calendar.setTime((Date) instance);
        calendar.add(Calendar.HOUR, hours);// 增加x小时
        Date date = calendar.getTime();
        return (T) date;
    }
    return null;
}

/**
 * 日期型字符串转化为日期 格式 { "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm",
 * "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm" }
 */
public static Date parseDate(Object str) {
    if (str == null) {
        return null;
    }
    return parseDate(str.toString(), "yyyy-MM-dd HH:mm:ss");
}

public static Date parseDate(Object str, String parsePattern) {
    if (str == null) {
        return null;
    }
    if (StringUtils.isBlank(parsePattern)) {
        parsePattern = "yyyy-MM-dd";
    }
    try {
        return org.apache.commons.lang3.time.DateUtils.parseDate(str.toString(), parsePattern);
    } catch (ParseException e) {
        return null;
    }
}