fxkh-txl-service/src/main/java/com/whdc/utils/DateUtils.java

package com.whdc.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.SimpleTimeZone;

/**
 * @author 李赛
 * @date 2022-06-26 1:01
 */
public class DateUtils {
    /**
     * 时间格式(yyyy-MM-dd HH:mm:ss)
     */
    public final static String DATE_TIME_PATTERN = "yyyy-MM-dd HH:mm:ss";


    public static final ThreadLocal<SimpleDateFormat> sdfhmsS = new ThreadLocal<SimpleDateFormat>() {
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
        }
    };

    public static final ThreadLocal<SimpleDateFormat> sdfYMDh = ThreadLocal.withInitial(() -> new SimpleDateFormat("yyyy-MM-dd HH:mm"));

    public static final ThreadLocal<SimpleDateFormat> sdfhms  = new ThreadLocal<SimpleDateFormat>() {
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat(DATE_TIME_PATTERN);
        }
    };
    public static final ThreadLocal<SimpleDateFormat> sdf_utc  = new ThreadLocal<SimpleDateFormat>() {
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
        }
    };
    public static final ThreadLocal<SimpleDateFormat> sdf_utc_sss  = new ThreadLocal<SimpleDateFormat>() {
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
        }
    };

    public static final ThreadLocal<SimpleDateFormat> sdf_Str  = ThreadLocal.withInitial(() -> new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy"));



    public static LocalDateTime strToLDT(String str,String format){
        return LocalDateTime.parse(str, DateTimeFormatter.ofPattern(format));
    }

    public static String dateToStr(Date date){
        return sdfhms.get().format(date);
    }

    public static String dateToStr(LocalDateTime date){
       return dateToStr(date,DATE_TIME_PATTERN);
    }
    public static String dateToStr(LocalDateTime date,String format){
        return date.format(DateTimeFormatter.ofPattern(format));
    }

    public static Date dateToStr(String dateString){
        try {
            return sdf_Str.get().parse(dateString);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }
    public static Date dateToStrYMDHds(String dateString){
        try {
            return sdfhms.get().parse(dateString);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    public static String dateToStr(Date date,  ThreadLocal<SimpleDateFormat> format){
        return format.get().format(date);
    }

    /**
     * mongo 日期查询isodate
     *
     * @param dateStr
     * @return
     */
    public static Date dateToISODate(String dateStr) throws ParseException {
        //T代表后面跟着时间，Z代表UTC统一时间
        Date             date   = formatD(dateStr);
        SimpleDateFormat format = sdfhms.get();
        format.setCalendar(new GregorianCalendar(new SimpleTimeZone(0, "GMT")));
        String isoDate = format.format(date);
        return format.parse(isoDate);
    }

    public static Date formatD(String dateStr) throws ParseException {
        return formatD(dateStr, DATE_TIME_PATTERN);
    }

    public static Date formatD(String dateStr, String format) throws ParseException {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);

        return simpleDateFormat.parse(dateStr);
    }


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

//        System.out.println(dateToISODate("2021-11-05T13:00:00Z"));
        System.out.println(dateToStr(LocalDateTime.now()));

    }
}