package net.pazz.utils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* @author: Peng Jian
* @date: 2018/6/19 9:21
* @description: 日期工具类
*/
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
private static final Log logger = LogFactory.getLog(DateUtils.class);
public static final String DATE_SHORT_FORMAT = "yyyyMMdd";
public static final String DATE_CH_FORMAT = "yyyy年MM月dd日";
public static final String DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
public static final String TIMESTAMP_FORMAT = "yyyy-MM-dd HH:mm:ss.S";
public static final String DATE_FORMAT = "yyyy-MM-dd";
public static final String DATE_MONTH_FORMAT = "yyyy-MM";
public static final String TIME_FORMAT = "HH:mm:ss";
public static final String DAYTIME_START = "00:00:00";
public static final String DAYTIME_END = "23:59:59";
private static final String[] FORMATS = {"yyyy-MM-dd", "yyyy-MM-dd HH:mm",
"yyyy-MM-dd HH:mm:ss", "HH:mm", "HH:mm:ss", "yyyy-MM",
"yyyy-MM-dd HH:mm:ss.S"};
private DateUtils() {
}
/**
* 字符串转换成日期 主要解决json传入日期问题
*/
public static Date convert(String str) {
if (str != null && str.length() > 0) {
if (str.length() > 10 && str.charAt(10) == 'T') {
str = str.replace('T', ' ');// 去掉json-lib加的T字母
}
for (String format : FORMATS) {
if (format.length() == str.length()) {
try {
Date date = new SimpleDateFormat(format).parse(str);
return date;
} catch (ParseException e) {
if (logger.isWarnEnabled()) {
logger.warn(e.getMessage());
}
}
}
}
}
return null;
}
/**
* 字符串、日期格式 转换日期
* @param format 例如: "yyyy-MM-dd HH:mm:ss"
* @param str 例如: "2012-12-03 23:21:24"
*/
public static Date convert(String str, String format) {
if (!StringUtils.isEmpty(str)) {
try {
Date date = new SimpleDateFormat(format).parse(str);
return date;
} catch (ParseException e) {
if (logger.isWarnEnabled()) {
logger.warn(e.getMessage());
}
}
}
return null;
}
/**
* 将日期转换成format字符串
* @param date 例如: Sun Jun 10 09:18:00 CST 2018
* @param dateFormat 例如: "yyyy-MM-dd HH:mm:ss"
*/
public static String convert(Date date, String dateFormat) {
if (date == null) {
return null;
}
if (null == dateFormat) {
dateFormat = DATE_TIME_FORMAT;
}
return new SimpleDateFormat(dateFormat).format(date);
}
/**
* 根据传入的日期 转换成这样格式的字符串 如：“yyyy-MM-dd HH:mm:ss”
*/
public static String convert(Date date) {
return convert(date, DATE_TIME_FORMAT);
}
/**
* 时间拼接 将日期和实现拼接 ymd 如2012-05-15 hm 如0812 最终 2012-05-15 08:12:00
*/
public static Date concat(String ymd, String hm) {
if (!StringUtils.isBlank(ymd) && !StringUtils.isBlank(hm)) {
try {
String dateString = ymd.concat(" ").concat(hm.substring(0, 2)).concat(":").concat(hm.substring(2, 4)).concat(":00");
Date date = DateUtils.convert(dateString, DateUtils.DATE_TIME_FORMAT);
return date;
} catch (NullPointerException e) {
if (logger.isWarnEnabled()) {
logger.warn(e.getMessage());
}
}
}
return null;
}
/**
* 根据传入的日期返回年月日的6位字符串，例：20101203
*/
public static String getDay(Date date) {
return convert(date, DATE_SHORT_FORMAT);
}
/**
* 根据传入的日期返回中文年月日字符串，例：2010年12月03日
*/
public static String getChDate(Date date) {
return convert(date, DATE_CH_FORMAT);
}
/**
* 返回该天从00:00:00开始的日期
*/
public static Date getStartDatetime(Date date) {
String thisDate = convert(date, DATE_FORMAT);
return convert(thisDate + " " + DAYTIME_START);
}
/**
* 返回该天到23:59:59结束的日期
*/
public static Date getEndDatetime(Date date) {
String thisDate = convert(date, DATE_FORMAT);
return convert(thisDate + " " + DAYTIME_END);
}
/**
* 返回n天到23:59:59结束的日期
*/
public static Date getEndDatetime(Date date, Integer diffDays) {
SimpleDateFormat dateFormat = new SimpleDateFormat(DATE_FORMAT);
String thisDate = dateFormat.format(date.getTime() + MILLIS_PER_DAY * diffDays);
return convert(thisDate + " " + DAYTIME_END);
}
/**
* 将传入的时间格式的字符串转成时间对象 例如：传入2012-12-03 23:21:24
*/
public static Date strToDate(String dateStr) {
SimpleDateFormat formatDate = new SimpleDateFormat(DATE_TIME_FORMAT);
Date date = null;
try {
date = formatDate.parse(dateStr);
} catch (Exception e) {
}
return date;
}
/**
* 返回该日期的最后一刻，精确到纳秒
*/
public static Timestamp getLastEndDatetime(Date endTime) {
Timestamp ts = new Timestamp(endTime.getTime());
ts.setNanos(999999999);
return ts;
}
/**
* 返回该日期加1秒
*/
public static Timestamp getEndTimeAdd(Date endTime) {
Timestamp ts = new Timestamp(endTime.getTime());
Calendar calendar = Calendar.getInstance();
calendar.setTime(ts);
calendar.add(Calendar.MILLISECOND, 1000);
calendar.set(Calendar.MILLISECOND, 0);
return new Timestamp(calendar.getTimeInMillis());
}
/**
* 返回该日期加 millisecond 毫秒，正数为加，负数为减
*/
public static Timestamp getDateAdd(Date date, int millisecond) {
Timestamp ts = new Timestamp(date.getTime());
Calendar calendar = Calendar.getInstance();
calendar.setTime(ts);
calendar.add(Calendar.MILLISECOND, millisecond);
calendar.set(Calendar.MILLISECOND, 0);
return new Timestamp(calendar.getTimeInMillis());
}
/**
* 相对当前日期，增加或减少天数
*/
public static String addDay(Date date, int day) {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(DATE_FORMAT);
return simpleDateFormat.format(new Date(date.getTime() + MILLIS_PER_DAY * day));
}
/**
* 相对当前日期，增加或减少天数
*/
public static Date addDayToDate(Date date, int day) {
return new Date(date.getTime() + MILLIS_PER_DAY * day);
}
public static Long getTimeDiff(String startTime, String endTime) {
int months = 0;
Long days = null;
Date startDate = null;
Date endDate = null;
try {
if (startTime.length() == 10 && endTime.length() == 10) {
startDate = new SimpleDateFormat(DATE_FORMAT).parse(startTime);
endDate = new SimpleDateFormat(DATE_FORMAT).parse(endTime);
days = getTimeDiff(startDate, endDate);
} else if (startTime.length() == 7 && endTime.length() == 7) {
startDate = new SimpleDateFormat(DATE_MONTH_FORMAT).parse(startTime);
endDate = new SimpleDateFormat(DATE_MONTH_FORMAT).parse(endTime);
months = getMonthDiff(startDate, endDate);
days = new Long((long) months);
} else {
startDate = new SimpleDateFormat(DATE_TIME_FORMAT).parse(startTime);
endDate = new SimpleDateFormat(DATE_TIME_FORMAT).parse(endTime);
days = getTimeDiff(startDate, endDate);
}
} catch (ParseException e) {
if (logger.isWarnEnabled()) {
logger.warn(e.getMessage());
}
days = null;
}
return days;
}
/**
* 返回两个时间的相差天数
*/
public static Long getTimeDiff(Date startTime, Date endTime) {
Long days = null;
Calendar c = Calendar.getInstance();
c.setTime(startTime);
long l_s = c.getTimeInMillis();
c.setTime(endTime);
long l_e = c.getTimeInMillis();
days = (l_e - l_s) / MILLIS_PER_DAY;
return days;
}
/**
* 返回两个时间的相差分钟数
*/
public static Long getMinuteDiff(Date startTime, Date endTime) {
Long minutes = null;
Calendar c = Calendar.getInstance();
c.setTime(startTime);
long l_s = c.getTimeInMillis();
c.setTime(endTime);
long l_e = c.getTimeInMillis();
minutes = (l_e - l_s) / MILLIS_PER_MINUTE;
return minutes;
}
/**
* 返回两个时间的相差秒数
*/
public static Long getSecondDiff(Date startTime, Date endTime) {
return (endTime.getTime() - startTime.getTime()) / MILLIS_PER_SECOND;
}
/**
* 返回两个时间的相差月数
*/
public static int getMonthDiff(Date startTime, Date endTime) {
int months = 0;
Calendar startCalendar = Calendar.getInstance();
Calendar endCalendar = Calendar.getInstance();
startCalendar.setTime(startTime);
endCalendar.setTime(endTime);
months = endCalendar.get(Calendar.MONTH) - startCalendar.get(Calendar.MONTH);
return months;
}
public static void main(String[] args) throws Exception {
String strType = "2018-06-20 12:00:00";
String format = "yyyy-MM-dd HH:mm:ss";
Date dateType = new Date();
Date date = new SimpleDateFormat(format).parse(strType);
String str = new SimpleDateFormat(format).format(dateType);
System.out.println("Date: " + date);
System.out.println("String: " + str);
Date newTime = new Date(date.getTime() + MILLIS_PER_DAY * 2);
System.out.println("newTime Date: " + newTime);
System.out.println("newTime String: " + new SimpleDateFormat(format).format(newTime));
System.out.println("相差天数: " + (newTime.getTime() - date.getTime()) / (1000l * 24 * 60 *60));
System.out.println("相差秒数: " + (newTime.getTime() - date.getTime()) / MILLIS_PER_SECOND);
Calendar calendar = Calendar.getInstance();
// calendar.setTime(date);
System.out.println("Calendar.getTimeInMillis() = " + calendar.getTimeInMillis());
System.out.println("Date.getTime() = " + dateType.getTime());
System.out.println("System.currentTimeMillis() = " + System.currentTimeMillis());
Date d = new Date(calendar.getTimeInMillis());
System.out.println(d.getTime());
System.out.println(calendar.getTimeInMillis() - dateType.getTime());
System.out.println((calendar.getTimeInMillis() - dateType.getTime()) / MILLIS_PER_SECOND);
Date currentTime = new Date();
System.out.println("当前时间: " + convert(currentTime));
Date newDate = getEndDatetime(currentTime, 1);
System.out.println("返回n天到23:59:59结束的日期: " + convert(newDate));
Date date1 = null;
try {
date1 = new SimpleDateFormat(DATE_TIME_FORMAT).parse("2018-06-10 09:18:00");
} catch (ParseException e) {
e.printStackTrace();
}
System.out.println("String转换date1: " + date1);
System.out.println("返回该日期的最后一刻，精确到纳秒: " + getLastEndDatetime(currentTime));
System.out.println("返回该日期加1秒: " + getEndTimeAdd(currentTime));
System.out.println("相对当前日期，增加10天: " + addDay(currentTime, 10));
System.out.println("currentTime: " + currentTime);
System.out.println("date1: " + date1);
System.out.println("相差的天数: " + (currentTime.getTime() - date1.getTime()) / MILLIS_PER_DAY);
}
}
日期工具类 DateUtils
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转载自blog.csdn.net/baidu_36327010/article/details/80747996
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