代码如下：（文章底部提供工具类下载）
import lombok.Data;
import org.apache.commons.lang.time.DateUtils;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
/**
* @author xujx
* @create 2018-2-3
* @Company: iufc
* @description：
**/
@Data
public class DateUtil {
public static final String YYYY_MM_DD = "yyyy-MM-dd";
public static final String YYYYMMDD = "yyyy/MM/dd";
public static final String HH_MM_SS = "HH:mm:ss";
public static final String HH_MM = "HH:mm";
public static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
public static final String YYYY_MM_DD_HH_MM = "yyyy-MM-dd HH:mm";
public static final String YYYY_MMDD = "yyyyMMdd";
public static final String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";
public static final String HHMMSS = "HHmmss";
public static final String YYYYMMDD_HH_MM_SS = "yyyy/MM/dd HH:mm:ss";
public static final String YYYY_MM = "yyyy-MM";
public static final String YYYY = "yyyy";
public static final String MM = "MM";
/**
* 返回自定义格式的当前日期时间字符串
*
* @param format 格式规则
* @return String 返回当前字符串型日期时间
*/
public static String getCurrentTime(String format) {
String returnStr = null;
SimpleDateFormat f = new SimpleDateFormat(format);
Date date = new Date();
returnStr = f.format(date);
return returnStr;
}
public static String getCurrentTime(Date date, String format) {
String returnStr = null;
SimpleDateFormat f = new SimpleDateFormat(format);
returnStr = f.format(date);
return returnStr;
}
public static long getTimeDifferenceBetweenEndTimeAndStartTime(Date startTime, Date endTime) {
long difference = endTime.getTime() - startTime.getTime();
return difference;
}
/**
* 计算2个日期年份相差多少年
* 列：2011-02-02 ~ 2017-03-02 大约相差 6年
*
* @param fromDate
* @param toDate
* @return
*/
public static int yearCompare(Date fromDate, Date toDate) {
SimpleDateFormat sdf = new SimpleDateFormat(YYYY);
String formatDateStr = sdf.format(fromDate);
String toDateStr = sdf.format(toDate);
// int day = Integer.parseInt(toDateStr) - Integer.parseInt(formatDateStr);
// if (day < 0) {
// return 0;
// }
return countYear(formatDateStr, toDateStr);
}
public static int countYear(String fromDateStr, String toDateStr) {
int day = Integer.parseInt(toDateStr) - Integer.parseInt(fromDateStr);
if (day < 0) {
return 0;
}
return day;
}
public static Date timeToDate(String time, String format) throws ParseException {
DateFormat dateFormat = new SimpleDateFormat(format);
Date date = null;
date = dateFormat.parse(time);
return date;
}
public static String dateToTime(Date date, String format) {
DateFormat dateFormat = new SimpleDateFormat(format);
String time = null;
time = dateFormat.format(date);
return time;
}
public static String thisYear() {
Calendar year = Calendar.getInstance();
return String.valueOf(year.get(Calendar.YEAR));
}
// 获取当前时间所在年的周数
public static int getWeekOfYear(Date date) {
Calendar c = new GregorianCalendar();
c.setFirstDayOfWeek(Calendar.MONDAY);
c.setMinimalDaysInFirstWeek(7);
c.setTime(date);
return c.get(Calendar.WEEK_OF_YEAR);
}
// 获取当前时间所在周的开始日期
public static Date getFirstDayOfWeek(Date date) {
Calendar c = new GregorianCalendar();
c.setFirstDayOfWeek(Calendar.MONDAY);
c.setTime(date);
c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek());
return c.getTime();
}
// 获取当前时间所在周的结束日期
public static Date getLastDayOfWeek(Date date) {
Calendar c = new GregorianCalendar();
c.setFirstDayOfWeek(Calendar.MONDAY);
c.setTime(date);
c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() + 6);
return c.getTime();
}
/*
*
* @author 张国召 2018/3/30 15:47
* @methodName getRecentlyNumberYear
* @param [date, num]
* @return java.lang.String
* @description 获取指定的最近年份。如。date为2018年，num=3，则返回2015,2016,2017的年数组值，
*/
public static String[] getRecentlyNumberYear(Date date, int num) {
String[] result = new String[num];
if (date != null) {
int year = date.getYear() + 1900;
for (int i = 0; i < num; i++) {
result[i] = String.valueOf(year - (num - i));
}
}
return result;
}
/*
*
* @author 张国召 2018/4/16 11:16
* @methodName getFirstDayOfMonth
* @param [date]
* @return java.util.Date
* @description 获取传入日期 所在月份的第一天
*/
public static Date getFirstDayOfMonth(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int last = calendar.getActualMinimum(Calendar.DAY_OF_MONTH);
calendar.set(Calendar.DAY_OF_MONTH, last);
return calendar.getTime();
}
/*
*
* @author 张国召 2018/4/16 11:17
* @methodName getEndDayOfMonth
* @param [date]
* @return java.util.Date
* @description 获取传入日期 所在月份的最后一天
*/
public static Date getLastDayOfMonth(Date date) {
final Calendar cal = Calendar.getInstance();
cal.setTime(date);
final int last = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
cal.set(Calendar.DAY_OF_MONTH, last);
return cal.getTime();
}
/*
*
* @author 张国召 2018/6/29 10:57
* @methodName getFirstDayOfMonthStr
* @param [yearMonth]
* @returnjava.lang.String
* @description 传入 年月格式的String 返回月第一天 年月日格式的String 如：（2018-06）（2018-06-01）
*/
public static String getFirstDayOfMonthStr(String yearMonth) throws ParseException {
if (yearMonth.length() != 7) return null;
SimpleDateFormat yearMonthDateFormat = new SimpleDateFormat("yyyy-MM");
Calendar calendar = Calendar.getInstance();
calendar.setTime(yearMonthDateFormat.parse(yearMonth));
int first = calendar.getActualMinimum(Calendar.DAY_OF_MONTH);
calendar.set(Calendar.DAY_OF_MONTH, first);
SimpleDateFormat yearMonthDayDateFormat = new SimpleDateFormat("yyyy-MM-dd");
return yearMonthDayDateFormat.format(calendar.getTime());
}
/*
*
* @author 张国召 2018/6/29 10:57
* @methodName getFirstDayOfMonthStr
* @param [yearMonth]
* @returnjava.lang.String
* @description 传入 年月格式的String 返回月的最后一天 年月日格式的String 如：（2018-06）（2018-06-30）
*/
public static String getLastDayOfMonthStr(String yearMonth) throws ParseException {
if (yearMonth.length() != 7) return null;
SimpleDateFormat yearMonthDateFormat = new SimpleDateFormat("yyyy-MM");
Calendar calendar = Calendar.getInstance();
calendar.setTime(yearMonthDateFormat.parse(yearMonth));
int last = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
calendar.set(Calendar.DAY_OF_MONTH, last);
SimpleDateFormat yearMonthDayDateFormat = new SimpleDateFormat("yyyy-MM-dd");
return yearMonthDayDateFormat.format(calendar.getTime());
}
/*
*
* @author 张国召 2018/6/26 17:55
* @methodName getYearArrBetweenTwoDate
* @param [startDate, endDate]
* @return java.lang.String[]
* @description 获取两个传入日期间的所有年份；如 startDate： 2016-05-06 endData：2018-08-08则返回 reslt=2016,2017,2018
*/
public static String getYearsStrBetweenTwoDate(Date startDate, Date endDate) {
StringBuilder result = new StringBuilder();
Calendar startCal = Calendar.getInstance();
startCal.setTime(startDate);
Calendar endCal = Calendar.getInstance();
endCal.setTime(endDate);
for (int i = startCal.get(Calendar.YEAR); i <= endCal.get(Calendar.YEAR); i++) {
result.append(i + ",");
}
return result.substring(0, result.length() - 1);
}
/*
*
* @author 张国召 2018/5/9 20:54
* @methodName getDateString
* @param [date]
* @return java.lang.String
* @description 年月日
*/
public static String getDateString(Date date) {
return new SimpleDateFormat("yyyy年MM月dd日").format(date);
}
/**
* 判断time是否在from，to之内
*
* @param time 指定日期
* @param from 开始日期
* @param to 结束日期
* @return
*/
public static boolean belongCalendar(Date time, Date from, Date to) {
Calendar date = Calendar.getInstance();
date.setTime(time);
Calendar after = Calendar.getInstance();
after.setTime(from);
Calendar before = Calendar.getInstance();
before.setTime(to);
if (time.getTime() >= from.getTime() && time.getTime() <= to.getTime()) {
return true;
} else {
return false;
}
// if (date.after(after) && date.before(before)) {
// return true;
// } else {
// return false;
// }
}
/**
* 字符串转化成日期
* @param strDate
* @param pattern
* @return
*/
public static LocalDate formatDate(String strDate, String pattern) {
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern);
return LocalDate.parse(strDate,dateTimeFormatter);
}
}
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