package com.boying.util;
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import com.baomidou.mybatisplus.core.toolkit.StringUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.sql.Timestamp;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import java.util.Date;
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/**
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* @version v3.3
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* @ClassName:DateUtil.java
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* @author: http://www.wgstart.com
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* @date: 2021年1月16日
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* @Description: DateUtil.java
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* @Copyright: 2019-2021 wgcloud. All rights reserved.
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*/
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public class DateUtil {
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private static final Logger logger = LoggerFactory.getLogger(DateUtil.class);
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private static final String DATE_PATTERN = "yyyy-MM-dd";
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private static final String DATETIME_PATTERN = "yyyy-MM-dd HH:mm:ss";
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private static final String DATETIME_PATTERN_ZH = "yyyy年MM月dd日HH:mm:ss";
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/**
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* 获取当前时间
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*
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* @return 当前日期
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*/
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public static Timestamp getNowTime() {
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SimpleDateFormat dateFormat = new SimpleDateFormat(DATETIME_PATTERN);
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Timestamp nowTime = Timestamp.valueOf(dateFormat.format(new Date()));
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return nowTime;
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}
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/**
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* 获取当前系统时间.
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* 默认模板格式yyyy-MM-dd hh:mm:ss.
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*
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* @return 当前系统时间
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*/
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public static String getCurrentDateTime() {
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return getCurrentDateTime(DATETIME_PATTERN);
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}
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/**
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* 获取当前系统同期。
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*
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* @return 当前系统日期
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*/
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public static String getCurrentDate() {
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return getCurrentDateTime(DATE_PATTERN);
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}
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/**
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* 获取当前系统时间.
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*
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* @return 当前系统时间
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*/
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public static String getCurrentDateTime(String pattern) {
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Calendar cal = Calendar.getInstance();
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SimpleDateFormat sdf = new SimpleDateFormat(pattern);
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return sdf.format(cal.getTime());
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}
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public static Date getDate(String dateStr) throws ParseException {
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return getDate(dateStr, DATETIME_PATTERN);
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}
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public static Date getDate(String dateStr, String pattern) throws
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ParseException {
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Date date = null;
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SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);
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date = dateFormat.parse(dateStr);
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return date;
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}
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public static String getDateString(Date date) {
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return getString(date, DATE_PATTERN);
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}
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public static String getDateTimeString(Date date) {
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return getString(date, DATETIME_PATTERN);
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}
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public static String getDateTimeZhString(Date date) {
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return getString(date, DATETIME_PATTERN_ZH);
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}
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public static String getString(Date date, String pattern) {
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SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);
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return dateFormat.format(date);
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}
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public static int getHour(Date date) {
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Calendar calendar = Calendar.getInstance();
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calendar.setTime(date);
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int hour = calendar.get(Calendar.HOUR_OF_DAY);
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return hour;
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}
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/**
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* 是否正在清空历史趋势图数据时间(8:10-8:25)，是返回true，否则返回false
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*
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* @return
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*/
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public static boolean isClearTime() {
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Calendar calendar = Calendar.getInstance();
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calendar.setTime(new Date());
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int hour = calendar.get(Calendar.HOUR_OF_DAY);
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int mins = calendar.get(Calendar.MINUTE);
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if (8 == hour && (mins >= 10 && mins <= 25)) {
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return true;
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}
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return false;
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}
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/**
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* 从当前时间往前推几天，得到新时间
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*
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* @param day
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* @return
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*/
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public static String getDateBefore(int day) {
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Calendar now = Calendar.getInstance();
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now.setTime(new Date());
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now.set(Calendar.DATE, now.get(Calendar.DATE) - day);
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return getString(now.getTime(), DATETIME_PATTERN);
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}
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/**
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* 秒转换为指定格式的日期
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*
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* @param second
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* @param patten
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* @return
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*/
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public static String secondToDate(Long second, String patten) {
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if (second == null) {
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return "";
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}
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Calendar calendar = Calendar.getInstance();
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calendar.setTimeInMillis(second * 1000);//转换为毫秒
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Date date = calendar.getTime();
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SimpleDateFormat format = new SimpleDateFormat(patten);
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String dateString = format.format(date);
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return dateString;
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}
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/**
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* 毫秒转换为指定格式的日期
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*
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* @param millisStr
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* @param patten
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* @return
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*/
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public static String millisToDate(String millisStr, String patten) {
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if (StringUtils.isEmpty(millisStr)) {
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return "";
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}
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try {
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Long millis = Long.valueOf(millisStr);
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Calendar calendar = Calendar.getInstance();
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calendar.setTimeInMillis(millis);//转换为毫秒
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Date date = calendar.getTime();
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SimpleDateFormat format = new SimpleDateFormat(patten);
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String dateString = format.format(date);
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return dateString;
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} catch (Exception e) {
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logger.error("millisToDate错误", e);
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}
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return "";
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}
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/**
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* 获取某几个小时之前的时间
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*
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* @param hours
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*/
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public static String beforeHourToNowDate(Integer hours) {
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if (null == hours || 0 == hours) {
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hours = 1;
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}
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Calendar c = Calendar.getInstance();
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long diffTimes = 3600 * 1000;
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long nowTimes = c.getTimeInMillis();
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c.setTimeInMillis(nowTimes - (hours * diffTimes));
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SimpleDateFormat sdf = new SimpleDateFormat(DATETIME_PATTERN);
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return sdf.format(c.getTime());
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}
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/**
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* 获取当前系统时间.
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* 格式yyyyMMddhhmmss
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*
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* @return 当前系统时间，不带符号
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*/
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public static String getCurrentDateTimeNoChar() {
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String currentTime = getCurrentDateTime();
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if (!StringUtils.isEmpty(currentTime)) {
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currentTime = currentTime.replace("-", "").replace(" ", "").replace(":", "");
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}
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return currentTime;
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}
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}
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