DateUtil-工具类

/**
 * 类描述：时间操作定义类 
 */
public class DateUtils{
    private static final Logger logger =  Logger.getLogger(DateUtils.class);
　　// ticks时间格式  
    //ticksToDatetime

    public static Date ticksToDate(long ticks){
        if(ticks == 0){
            return null;
        }
        return new Date((ticks- 621355968000000000l)/10000);
    }
    //ticksToDatetime
    public static String ticksToObject(long ticks,String pattern){
        if(ticks == 0){
            return "";
        }
        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        return sdf.format(new Date((ticks- 621355968000000000l)/10000));
    }

　　// SimpleDateFormat 线程安全配置

    /** 锁对象 */
    private static final Object lockObj = new Object();

    /** 存放不同的日期模板格式的sdf的Map */
    private static Map<String, ThreadLocal<SimpleDateFormat>> sdfMap = new HashMap<String, ThreadLocal<SimpleDateFormat>>();

    /**
     * 返回一个ThreadLocal的sdf,每个线程只会new一次sdf
     * @param pattern
     * @return
     */
    private static SimpleDateFormat getSdf(final String pattern) {
        ThreadLocal<SimpleDateFormat> tl = sdfMap.get(pattern);
        // 此处的双重判断和同步是为了防止sdfMap这个单例被多次put重复的sdf
        if (tl == null) {
            synchronized (lockObj) {
                tl = sdfMap.get(pattern);
                if (tl == null) {
                    // 只有Map中还没有这个pattern的sdf才会生成新的sdf并放入map

                    // 这里是关键,使用ThreadLocal<SimpleDateFormat>替代原来直接new SimpleDateFormat
                    tl = new ThreadLocal<SimpleDateFormat>() {

                        @Override
                        protected SimpleDateFormat initialValue() {

                            return new SimpleDateFormat(pattern);
                        }
                    };
                    sdfMap.put(pattern, tl);
                }
            }
        }
        return tl.get();
    }
    /**
     * 是用ThreadLocal<SimpleDateFormat>来获取SimpleDateFormat,这样每个线程只会有一个SimpleDateFormat
     * @param date
     * @param pattern
     * @return
     */
    public static String format(Date date, String pattern) {
        return getSdf(pattern).format(date);
    }
    public static Date parse(String dateStr, String pattern) throws ParseException {
        return getSdf(pattern).parse(dateStr);
    }

    /**
     * 本地时间转UTC时间
     * @param cron  cron表达式
     * @param timezone 时区
     * @return
     */
    public static String localToUTC(String cron , int timezone) {
        logger.info("===cron==="+cron);
        logger.info("===timezone==="+timezone);
        String offset = "";
        if(timezone<0){
            offset = String.valueOf(-(timezone));
        }else if(timezone>0){
            offset = String.valueOf(-timezone);
        }else{
            return cron;
        }
        Date date = new Date();
        String crons[] = cron.split(" ");
        String time =  "";
        String newCron = "";
        String newTime = "";
        logger.info("===length==="+crons.length);
        if(crons.length==5){
            String hour = crons[1];
            String hours [] = hour.split("-");
            if(hours.length==1){
                String hour0 = hours[0];
                if(hours[0].indexOf("/")>-1){
                    hour0 = hour0.substring(0,hour0.indexOf("/"));
                }
                if(!isInteger(hour0)){
                    return cron;
                }else{
                    if("*".equals(crons[4])){
                        time += getCurrentYear(date)+"-";
                    }else{
                        time += crons[4]+"-";
                    }
                    if("*".equals(crons[3])){
                        time += getCurrentMonth(date)+"-";
                    }else{
                        time += crons[3]+"-";
                    }
                    if("*".equals(crons[2])){
                        time += getCurrentDay(date)+" ";
                    }else{
                        time += crons[2]+" ";
                    }
                    time += hour0 + ":" + "00";
                    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
                    try {
                        logger.info(time);
                        logger.info("UTC"+offset);
                        Date date2 = sdf.parse(time);
                        sdf.setTimeZone(TimeZone.getTimeZone("UTC"+offset));
                        newTime = sdf.format(date2);
                        logger.info("====newTime==="+newTime);
                        SimpleDateFormat sdf3 = new SimpleDateFormat("yyyy-MM-dd HH:mm");
                        Date date3 = sdf3.parse(newTime);
                        if(hours[0].indexOf("/")>-1){
                            newCron = crons[0]+" "+numberFormat(getCurrentHour(date3))+hours[0].substring(hours[0].indexOf("/"))+" ";
                        }else{
                            newCron = crons[0]+" "+numberFormat(getCurrentHour(date3))+" ";
                        }
                        if(!"*".equals(crons[2])){
                            newCron += numberFormat(getCurrentDay(date3))+" ";
                        }else{
                            newCron += crons[2]+" ";
                        }
                        if(!"*".equals(crons[3])){
                            newCron += numberFormat(getCurrentMonth(date3))+" ";
                        }else{
                            newCron += crons[3]+" ";
                        }
                        newCron += crons[4]+" ";
                        logger.info("====newCron==="+newCron);
                        return newCron;
                    }catch (ParseException e){
                        logger.error(e);
                        return cron;
                    }
                }
            }else{
                if(!isInteger(hours[0])){
                    return cron;
                }else{
                    if("*".equals(crons[4])){
                        time += getCurrentYear(date)+"-";
                    }else{
                        time += crons[4]+"-";
                    }
                    if("*".equals(crons[3])){
                        time += getCurrentMonth(date)+"-";
                    }else{
                        time += crons[3]+"-";
                    }
                    if("*".equals(crons[2])){
                        time += getCurrentDay(date)+" ";
                    }else{
                        time += crons[2]+" ";
                    }
                    time += hours[0] + ":" + "00";
                    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
                    String hour0 = "";
                    try {
                        logger.info(time);
                        logger.info("UTC"+offset);
                        Date date2 = sdf.parse(time);
                        sdf.setTimeZone(TimeZone.getTimeZone("UTC"+offset));
                        newTime = sdf.format(date2);
                        logger.info("====newTime==="+newTime);
                        SimpleDateFormat sdf3 = new SimpleDateFormat("yyyy-MM-dd HH:mm");
                        Date date3 = sdf3.parse(newTime);
                        hour0 = getCurrentHour(date3);
                        logger.info("====hour0==="+hour0);
                    }catch (ParseException e){
                        logger.error(e);
                        return cron;
                    }

                    String hour1 = hours[1];
                    if(hours[1].indexOf("/")>-1){
                        hour1 = hour1.substring(0,hour1.indexOf("/"));
                    }
                    String time2 = "";
                    if("*".equals(crons[4])){
                        time2 += getCurrentYear(date)+"-";
                    }else{
                        time2 += crons[4]+"-";
                    }
                    if("*".equals(crons[3])){
                        time2 += getCurrentMonth(date)+"-";
                    }else{
                        time2 += crons[3]+"-";
                    }
                    if("*".equals(crons[2])){
                        time2 += getCurrentDay(date)+" ";
                    }else{
                        time2 += crons[2]+" ";
                    }
                    time2 += hour1 + ":" + "00";
                    try {
                        logger.info(time2);
                        SimpleDateFormat sdf4 = new SimpleDateFormat("yyyy-MM-dd HH:mm");
                        Date date4 = sdf4.parse(time2);
                        sdf4.setTimeZone(TimeZone.getTimeZone("UTC"+offset));
                        newTime = sdf4.format(date4);
                        logger.info("====newTime==="+newTime);
                        SimpleDateFormat sdf3 = new SimpleDateFormat("yyyy-MM-dd HH:mm");
                        Date date3 = sdf3.parse(newTime);
                        String hour2 = getCurrentHour(date3);
                        String newHour = "";
                        logger.info(hours[1]);
                        if(hours[1].indexOf("/")>-1){
                            newHour = numberFormat(hour0)+"-"+numberFormat(hour2)+hours[1].substring(hours[1].indexOf("/"));
                        }else{
                            newHour = numberFormat(hour0)+"-"+numberFormat(hour2);
                        }
                        newCron = crons[0]+" "+newHour+" ";
                        if(!"*".equals(crons[2])){
                            newCron += numberFormat(getCurrentDay(date3))+" ";
                        }else{
                            newCron += crons[2]+" ";
                        }
                        if(!"*".equals(crons[3])){
                            newCron += numberFormat(getCurrentMonth(date3))+" ";
                        }else{
                            newCron += crons[3]+" ";
                        }
                        newCron += crons[4]+" ";
                        logger.info("====newCron==="+newCron);
                        return newCron;
                    }catch (ParseException e){
                        logger.error(e);
                        return cron;
                    }
                }
            }
        }else{
            return cron;
        }
    }

    //去除首位0
    public static String numberFormat(String number) {
        int num = Integer.parseInt(number);
        if(num<10){
            number = number.substring(1);
        }
        return number;
    }

    //获得当前年份
    public static String getCurrentYear(Date date){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy");
        return sdf.format(date);
    }

    //获得当前月份
    public static String getCurrentMonth(Date date){
        SimpleDateFormat sdf = new SimpleDateFormat("MM");
        return sdf.format(date);
    }

    //获得当前日
    public static String getCurrentDay(Date date){
        SimpleDateFormat sdf = new SimpleDateFormat("dd");
        return sdf.format(date);
    }

    //获得当前时
    public static String getCurrentHour(Date date){
        SimpleDateFormat sdf = new SimpleDateFormat("HH");
        return sdf.format(date);
    } 
    //两时间相减获得时分秒
    public static String formatDuration(String startDate ,String endDate){
        if(StringUtil.isNotEmpty(startDate) && StringUtil.isNotEmpty(endDate)){
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化时间
            try{
                Long start = sdf.parse(startDate).getTime();
                Long end = sdf.parse(endDate).getTime();
                Long time = end-start;
                int seconds = time.intValue()/1000;
                return secToTime(seconds);
            }catch (ParseException e){
                logger.error(e);
                return "";
            }
        }else{
            return "";
        }
    }

    // 整数(秒数)转换为时分秒
    public static String secToTime(int time) {
        int hour = 0;
        int minute = 0;
        int second = 0;
        if (time <= 0)
            second = 0;
        else {
            minute = time / 60;
            if (minute < 60) {
                second = time % 60;
            } else {
                hour = minute / 60;
                minute = minute % 60;
                second = time - hour * 3600 - minute * 60;
            }
        }
        String h="",m="",s="";
        if(hour!=0){
            h = hour+"时";
        }
        if(minute!=0){
            m = minute+"分";
        }
        if(second!=0){
            s = second+"秒";
        }
        return h+m+s;
    }

}