超级详细的日期处理工具类（包含常用的24个方法）：
package com.hdyanfa.interact.util;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import org.apache.commons.lang3.StringUtils;
/**
* 日期处理工具类
*/
public class DateTimeUtil{
public static final String FULL_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
public static final String FULL_DATE_FORMAT_CN = "yyyy年MM月dd日 HH时mm分ss秒";
public static final String PART_DATE_FORMAT = "yyyy-MM-dd";
public static final String PART_DATE_FORMAT_CN = "yyyy年MM月dd日";
public static final String YEAR_DATE_FORMAT = "yyyy";
public static final String MONTH_DATE_FORMAT = "MM";
public static final String DAY_DATE_FORMAT = "dd";
public static final String WEEK_DATE_FORMAT = "week";
public static final String YEAR_MONTH_DATE_FORMAT= "yyyyMMdd";
/**
* 将日期类型转换为字符串
* @param date 日期
* @param xFormat 格式
* @return
*/
public static String getFormatDate(Date date,String xFormat){
date = date == null ? new Date() : date;
xFormat = StringUtils.isNotEmpty(xFormat) == true ? xFormat : FULL_DATE_FORMAT;
SimpleDateFormat sdf = new SimpleDateFormat(xFormat);
return sdf.format(date);
}
/**
* 比较日期大小
* @param dateX
* @param dateY
* @return x < y return [-1];
* x = y return [0] ;
* x > y return [1] ;
*/
public static int compareDate(Date dateX,Date dateY){
return dateX.compareTo(dateY);
}
/**
* 将日期字符串转换为日期格式类型
* @param xDate
* @param xFormat 为NULL则转换如：2012-06-25
* @return
*/
public static Date parseString2Date(String xDate, String xFormat) {
while(!isNotDate(xDate)){
xFormat = StringUtils.isNotEmpty(xFormat) == true ? xFormat : PART_DATE_FORMAT;
SimpleDateFormat sdf = new SimpleDateFormat(xFormat);
Date date = null ;
try {
date = sdf.parse(xDate);
} catch (ParseException e) {
e.printStackTrace();
return null;
}
return date;
}
return null;
}
/**
* 判断需要转换类型的日期字符串是否符合格式要求
* @param xDate
* @return
*/
public static boolean isNotDate(String xDate){
SimpleDateFormat sdf = new SimpleDateFormat(PART_DATE_FORMAT);
try {
if(StringUtils.isEmpty(xDate)){
return true;
}
sdf.parse(xDate);
return false;
} catch (ParseException e) {
e.printStackTrace();
return true;
}
}
public static boolean isDate(String xDate){
return !isDate(xDate);
}
/**
* 获取俩个日期之间相差天数
* @param dateX
* @param dateY
* @return
*/
public static int getDiffDays(Date dateX,Date dateY){
if ((dateX == null) || (dateY == null)){
return 0;
}
int dayX = (int)(dateX.getTime() / (60 * 60 * 1000 * 24));
int dayY = (int)(dateY.getTime() / (60 * 60 * 1000 * 24));
return dayX > dayY ? dayX - dayY : dayY - dayX;
}
/**
* 获取俩个日期之间相差天数(日期)
* @param dateX
* @param dateY
* @return
*/
public static int getDiffDaysNoABS(Date dateX,Date dateY){
if ((dateX == null) || (dateY == null)){
return 0;
}
int dayX = (int)(dateX.getTime() / (60 * 60 * 1000 * 24));
int dayY = (int)(dateY.getTime() / (60 * 60 * 1000 * 24));
return dayX - dayY;
}
/**
* 获取传值日期之后几天的日期并转换为字符串类型
* @param date 需要转换的日期 date 可以为NULL 此条件下则获取当前日期
* @param after 天数
* @param xFormat 转换字符串类型 (可以为NULL)
* @return
*/
public static String getAfterCountDate(Date date, int after, String xFormat) {
date = date == null ? new Date() : date;
xFormat = StringUtils.isNotEmpty(xFormat) == true ? xFormat : PART_DATE_FORMAT;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_MONTH, after);
return getFormatDate(calendar.getTime(), xFormat);
}
/**
* 获取传值日期之前几天的日期并转换为字符串类型
* @param date 需要转换的日期 date 可以为NULL 此条件下则获取当前日期
* @param before 天数
* @param xFormat 转换字符串类型 (可以为NULL)
* @return
*/
public static String getBeforeCountDate(Date date, int before, String xFormat) {
date = date == null ? new Date() : date;
xFormat = StringUtils.isNotEmpty(xFormat) == true ? xFormat : PART_DATE_FORMAT;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_MONTH, -before);
return getFormatDate(calendar.getTime(), xFormat);
}
/**
* 获取日期的参数 如：年 , 月 , 日 , 星期几
*
* @param xDate 日期 可以为日期格式,可以是字符串格式; 为NULL或者其他格式时都判定为当前日期
* @param xFormat 年 yyyy 月 MM 日 dd 星期 week ;其他条件下都返回0
*/
public static int getDateTimeParam(Object xDate,String xFormat) {
xDate = xDate == null ? new Date() : xDate;
Date date = null;
if(xDate instanceof String){
date = parseString2Date(xDate.toString(), null);
} else if(xDate instanceof Date){
date = (Date) xDate;
} else {
date = new Date();
}
date = date == null ? new Date() : date;
if (StringUtils.isNotEmpty(xFormat)
&& (xFormat.equals(YEAR_DATE_FORMAT)
|| xFormat.equals(MONTH_DATE_FORMAT)
|| xFormat.equals(DAY_DATE_FORMAT)) ){
return Integer.parseInt(getFormatDate(date, xFormat));
} else if(StringUtils.isNotEmpty(xFormat)
&& (WEEK_DATE_FORMAT.equals(xFormat))) {
Calendar cal = Calendar.getInstance(); cal.setTime(date);
int week = cal.get(java.util.Calendar.DAY_OF_WEEK) - 1 == 0 ?
7 : cal.get(java.util.Calendar.DAY_OF_WEEK) - 1;
return week;
} else {
return 0;
}
}
/**
* 日期格式转换为时间戳
* @param time
* @param format
* @return
*/
public static Long getLongTime(String time,String format){
SimpleDateFormat sdf = new SimpleDateFormat(format);
Date date = null;
try {
date = sdf.parse(time);
return (date.getTime()/1000);
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
/**
* 获取星期字符串
* @param xDate
* @return
*/
public static String getWeekString(Object xDate){
int week = getDateTimeParam(xDate,WEEK_DATE_FORMAT);
switch (week) {
case 1:
return "星期一";
case 2:
return "星期二";
case 3:
return "星期三";
case 4:
return "星期四";
case 5:
return "星期五";
case 6:
return "星期六";
case 7:
return "星期日";
default :
return "";
}
}
/**
* 获得十位时间
*/
public static Long getTenBitTimestamp(){
return System.currentTimeMillis()/1000;
}
/**
* 获得某天的结束时间
*/
public static Date getDateEnd(Date date){
return new Date(date.getTime()+(86400-1)*1000);
}
/**
* 日期格式转换为毫秒
*
* @param time
* @param format
* @return
*/
public static Long getLongDateTime(String time,String format){
SimpleDateFormat sdf = new SimpleDateFormat(format);
Date date = null;
try {
date = sdf.parse(time);
return date.getTime();
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
/**
* 获取某天开始时间戳_10位
*/
public static Long getStartTimestamp(Date date){
Calendar calendar = Calendar.getInstance();
date=date==null ? new Date() : date;
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTime().getTime()/1000;
}
/**
* 获取某天结束时间戳_10位
*/
public static Long getEndTimestamp(Date date){
Calendar calendar = Calendar.getInstance();
date=date==null ? new Date() : date;
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 999);
return calendar.getTime().getTime()/1000;
}
/**
* 获取昨天日期
*
* @param date
* @return
*/
public static Date getYesterday(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_MONTH, -1);
calendar.set(Calendar.HOUR_OF_DAY, 9);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 999);
date = calendar.getTime();
return date;
}
/**
* 获取明天时间（参数时间+1天）
* @param date
* @return
*/
public static Date getTomorrowday(Date date){
Calendar c = Calendar.getInstance();
c.setTime(date);
c.add(Calendar.DAY_OF_YEAR, +1);
return c.getTime();
}
/**
* 10位int型的时间戳转换为String(yyyy-MM-dd HH:mm:ss)
*
* @param time
* @return
*/
public static String timestampToString(Integer time,String format) {
// int转long时，先进行转型再进行计算，否则会是计算结束后在转型
long temp = (long) time * 1000;
Timestamp ts = new Timestamp(temp);
String tsStr = "";
DateFormat dateFormat = new SimpleDateFormat(format);
try {
// 方法一
tsStr = dateFormat.format(ts);
} catch (Exception e) {
e.printStackTrace();
}
return tsStr;
}
/**
* 获取某天开始时间
*/
public static Date getStartTime(Date date){
Calendar calendar = Calendar.getInstance();
date=date==null ? new Date() : date;
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTime();
}
/**
* 获取某天结束时间
*/
public static Date getEndTime(Date date){
Calendar calendar = Calendar.getInstance();
date=date==null ? new Date() : date;
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 999);
return calendar.getTime();
}
/**
* Date类型转换为10位时间戳
*
* @param time
* @return
*/
public static Integer DateToTimestamp(Date time) {
Timestamp ts = new Timestamp(time.getTime());
return (int) ((ts.getTime()) / 1000);
}
/**
* 获取当前时间之前或之后几分钟
* @param minute
* @return
*/
public static String getTimeByMinute(int minute,Date time) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(time);
calendar.add(Calendar.MINUTE, minute);
return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calendar.getTime());
}
}