package com.yukx.common.utils;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.ZoneId;
import java.util.Date;
/**
* @author yukx
* @Desc 日期常用转换、计算工具类
*/
@Slf4j
public class DateUtils {
/**
* 年月日 时分秒
*/
public static final String DEFAULT_PATTERN = "yyyy-MM-dd HH:mm:ss";
/**
* 年月日
*/
public static final String YEAR_MONTH_DAY_PATTERN = "yyyy-MM-dd";
/**
* 年月日时分
*/
public static final String YEAR_MONTH_DAY_HOUR_MINUTE_PATTERN = "yyyy-MM-dd HH:mm";
/**
* 时分
*/
public static final String HOUR_MINUTE_PATTERN = "HH:mm";
/**
* 日期转字符串
* @param date
* @param pattern 格式
* @return
*/
public static String dateToString(Date date,String pattern){
SimpleDateFormat formatter = new SimpleDateFormat(pattern);
return formatter.format(date);
}
/**
* 日期转字符串 yyyy-MM-dd HH:mm:ss
* @param date
* @return
*/
public static String dateToString(Date date){
SimpleDateFormat formatter = new SimpleDateFormat(DEFAULT_PATTERN);
return formatter.format(date);
}
/**
* 字符串转日期
* @param date
* @param pattern
* @return
*/
public static Date stringToDate(String date,String pattern){
SimpleDateFormat formatter = new SimpleDateFormat(pattern);
try {
return formatter.parse(date);
} catch (ParseException e) {
log.warn(e.getMessage(),e);
}
return null;
}
/**
* 获取世界标准时间
* @param dateText
* @return
*/
public static String getUTCDateStr(String dateText){
if (StringUtils.isBlank(dateText)){
return null;
}
if (!"Z".equalsIgnoreCase(dateText.substring(dateText.length()-1))){
dateText = dateText+"Z";
}
// 格式
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
String dateStr = null;
try {
dateStr = new SimpleDateFormat(DEFAULT_PATTERN).format(formatter.parse(dateText));
} catch (ParseException e) {
log.warn("getUTCDate方法日期转换异常："+dateText);
}
return dateStr;
}
/**
* 日期比较
* @param startDateTime
* @param endDateTime
* @return
* startDateTime<endDateTime 返回 1
* startDateTime>endDateTime 返回 -1
* startDateTime=endDateTime 返回 0
*/
public static Integer dateCompare(Date startDateTime,String endDateTime){
if (startDateTime == null || endDateTime == null){
return 0;
}
Date suspendEndDateTime = DateUtils.stringToDate(endDateTime,DEFAULT_PATTERN);
if (startDateTime == null || suspendEndDateTime == null){
return 0;
}
return suspendEndDateTime.compareTo(startDateTime);
}
/**
* 计算相差秒数
* @param startTime
* @param endTime
* @return
*/
public static long timeDifferenceSecond(String startTime,String endTime){
try {
Date startDate = new SimpleDateFormat(DEFAULT_PATTERN).parse(startTime);
Date endDate = new SimpleDateFormat(DEFAULT_PATTERN).parse(endTime);
long startSecond = startDate.getTime()/1000;
long endSecond = endDate.getTime()/1000;
return endSecond-startSecond;
} catch (ParseException e) {
log.warn(e.getMessage(),e);
}
return 0;
}
/**
* 计算两个日期之间相差天数(只按照日期来算)
*
* @param endDate
* @return
*/
public static Long LocalDateDifferenceDay(Date startDate,Date endDate) {
SimpleDateFormat formatter = new SimpleDateFormat(DEFAULT_PATTERN);
try {
LocalDate endLocalDate = endDate.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
LocalDate startLocalDate = startDate.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
return endLocalDate.toEpochDay() - startLocalDate.toEpochDay();
} catch (Exception e) {
log.error(formatter.format(endDate) + "转换为LocalDate异常:" + e.getMessage(), e);
}
return null;
}
}
原文链接: https://www.yukx.com/javadev/article/details/2335.html 优科学习网日期常用转换、计算工具类 DateUtils
