package com.dsh.utils;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.util.Assert;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.time.Duration;
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import java.time.LocalDateTime;
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import java.time.format.DateTimeFormatter;
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import java.util.Date;
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/**
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* @author: lihong .
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* @email: lihongvst@foxmail.com .
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* @createTime: 2019/6/26 18:02 .
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* @describe: 时间工具类.
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**/
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@Slf4j
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public final class DateUtils {
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public static final String yyyy_MM_dd_HH_mm_ss = "yyyy-MM-dd HH:mm:ss";
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public static final String yy_LINK_MM = "yyMM";
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public static final String yyyy_MM_dd = "yyyy-MM-dd";
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/**
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* 格式化时间
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*
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* @param localDateTime
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* @param parse
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* @return
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*/
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public static String parseDate(LocalDateTime localDateTime, String parse) {
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return localDateTime.format(DateTimeFormatter.ofPattern(parse));
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}
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/**
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* 时间转时间
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*
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* @param date
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* @param parse
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* @return
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*/
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public static Date dateToDate(Date date, String parse) {
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SimpleDateFormat sdf = new SimpleDateFormat(parse);
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try {
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return sdf.parse(sdf.format(date));
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} catch (ParseException e) {
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e.printStackTrace();
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log.error("格式化时间异常, date:{}, parse:{}", date, parse);
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}
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return null;
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}
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/**
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* 差值计算
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*
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* @param startTime
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* @param endTime
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* @return 毫秒
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*/
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public static long diff(LocalDateTime startTime, LocalDateTime endTime) {
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Assert.notNull(startTime, "开始时间不能为空.");
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Assert.notNull(endTime, "结束时间不能为空");
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Duration duration = Duration.between(startTime, endTime);
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return duration.toMillis();
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}
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/**
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* 根据给出的Date值和格式串采用操作系统的默认所在的国家风格来格式化时间，并返回相应的字符串
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*
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* @param date
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* @param formatStr
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* @return 如果为null，返回字符串""
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*/
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public static String formatDateTimeToString(Date date, String formatStr) {
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String reStr = "";
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if (date == null || formatStr == null || formatStr.trim().length() < 1) {
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return reStr;
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}
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SimpleDateFormat sdf = new SimpleDateFormat();
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sdf.applyPattern(formatStr);
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reStr = sdf.format(date);
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return reStr;
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}
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}
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