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@@ -0,0 +1,201 @@
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+package com.aoyang.tms.util;
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+
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+import java.text.DateFormat;
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+import java.text.ParseException;
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+import java.text.SimpleDateFormat;
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+import java.time.LocalDateTime;
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+import java.util.Calendar;
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+import java.util.Date;
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+
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+/**
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+ * @Description: 日期时间工具类
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+ * @Author guoyong
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+ * @Date 2022/4/24 10:51
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+ * @Version 1.0
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+ */
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+
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+public class DateUtils {
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+ /**
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+ * 通过Date类获取时间
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+ *
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+ * @return
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+ */
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+ public static String getDateByDate() {
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+ Date date = new Date();
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+ SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-HH-dd HH:mm:ss");
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+ String dateStr = dateFormat.format(date);
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+ System.out.println(dateStr);
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+ return dateStr;
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+ }
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+
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+
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+ /**
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+ * 通过Calendar类获取时间
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+ *
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+ * @return
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+ */
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+
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+ public static String getDateByCalendar() {
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+ Calendar calendar = Calendar.getInstance();
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+ Date date = calendar.getTime();
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+ SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-HH-dd HH:mm:ss");
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+ String dateStr = dateFormat.format(date);
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+ System.out.println(dateStr);
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+ return dateStr;
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+ }
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+
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+
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+ /**
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+ * 通过字符串获取时间
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+ *
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+ * @param dateStr
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+ * @return
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+ */
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+
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+ public static Date formString(String dateStr) {
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+ SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-HH-dd HH:mm:ss");
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+ try {
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+ Date date = dateFormat.parse(dateStr);
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+ System.out.println(date);
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+ return date;
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+ } catch (ParseException e) {
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+ e.printStackTrace();
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+ }
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+ return null;
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+ }
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+
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+
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+ /**
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+ * 通过时间戳获取时间
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+ *
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+ * @param time
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+ * @return
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+ */
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+
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+ public static String getByLong(long time) {
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+ SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-HH-dd HH:mm:ss");
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+ String date = dateFormat.format(time);
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+ return date;
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+
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+ }
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+
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+ /**
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+ * 获取系统时间，时间戳
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+ *
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+ * @return
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+ */
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+ public static long getCurrentTime() {
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+ long time = System.currentTimeMillis();
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+ return time;
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+
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+ }
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+
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+ /**
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+ * 获取当前年月日
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+ *
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+ * @return
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+ */
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+ public static void getYearMonthDay() {
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+
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+//第一种，通过Calendar类获取
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+ Calendar now = Calendar.getInstance();
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+ System.out.println("年: " + now.get(Calendar.YEAR));
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+ System.out.println("月: " + (now.get(Calendar.MONTH) + 1) + "");
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+ System.out.println("日: " + now.get(Calendar.DAY_OF_MONTH));
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+ System.out.println("时: " + now.get(Calendar.HOUR_OF_DAY));
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+ System.out.println("分: " + now.get(Calendar.MINUTE));
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+ System.out.println("秒: " + now.get(Calendar.SECOND));
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+ System.out.println("当前时间毫秒数：" + now.getTimeInMillis());
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+//第二种，通过Date类获取
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+ Date date = new Date();
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+ DateFormat df1 = DateFormat.getDateInstance();//日期格式，精确到日
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+ System.out.println(df1.format(date));
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+ DateFormat df2 = DateFormat.getDateTimeInstance();//可以精确到时分秒
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+ System.out.println(df2.format(date));
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+ DateFormat df3 = DateFormat.getTimeInstance();//只显示出时分秒
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+ System.out.println("只显示出时分秒:" + df3.format(date));
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+ DateFormat df4 = DateFormat.getDateTimeInstance(DateFormat.FULL, DateFormat.FULL); //显示日期，周，上下午，时间(精确到秒)
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+ System.out.println("显示日期，周，上下午，时间(精确到秒):" + df4.format(date));
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+ DateFormat df5 = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG); //显示日期,上下午，时间(精确到秒)
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+ System.out.println("显示日期,上下午，时间(精确到秒):" + df5.format(date));
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+ DateFormat df6 = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT); //显示日期，上下午,时间(精确到分)
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+ System.out.println("显示日期，上下午,时间(精确到分):" + df6.format(date));
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+ DateFormat df7 = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM); //显示日期，时间(精确到分)
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+ System.out.println("显示日期，时间(精确到分):" + df7.format(date));
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+ String[] dates = new SimpleDateFormat("yyyy-MM-dd").format(date).split("-");
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+ String year = dates[0];
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+ String month = dates[1];
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+ String day = dates[2];
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+ String[] months = new SimpleDateFormat("HH:mm:ss").format(date).split(":");
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+ String hour = dates[0];
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+ String minute = dates[1];
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+ String seconde = dates[2];
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+ }
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+
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+
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+ /**
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+ * 获取前一段时间/后一段时间
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+ */
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+ public static void beforTime() {
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+//根据现在时间计算
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+ Calendar now = Calendar.getInstance();
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+ now.add(Calendar.YEAR, 1); //现在时间是1年后
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+ System.out.println(now);
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+ now.add(Calendar.YEAR, -1); //现在时间是1年前
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+ System.out.println(now);
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+//根据某个特定的时间 date (Date 型) 计算
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+ Calendar specialDate = Calendar.getInstance();
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+ specialDate.setTime(new Date()); //注意在此处将 specialDate 的值改为特定日期
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+ specialDate.add(Calendar.YEAR, 1); //特定时间的1年后
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+ System.out.println(specialDate);
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+ specialDate.add(Calendar.YEAR, -1); //特定时间的1年前
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+ System.out.println(specialDate);
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+
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+ }
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+
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+
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+ /**
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+ * 计算两个日期相差多少天、小时、分钟、秒
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+ */
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+
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+ public static String betweenTime(LocalDateTime startTime, LocalDateTime endTime) {
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+ java.time.Duration duration = java.time.Duration.between(startTime, endTime);
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+ //总秒
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+ long seconds = duration.toMillis() / 1000;
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+ //总分钟
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+ long minutes = duration.toMinutes();
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+ //总小时
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+ long hours = duration.toHours();
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+ //总天数
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+ long days = duration.toDays();
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+
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+ System.out.println(days);
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+ System.out.println(hours);
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+ System.out.println(minutes);
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+ System.out.println(seconds);
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+ String last = "";
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+ if (days > 0) {
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+ last = last + days + "天";
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+ }
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+ if (hours > 0) {
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+ last = last + hours % 24 + "小时";
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+ }
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+ if (minutes > 0) {
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+ last = last + minutes % 60 + "分钟";
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+ }
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+ if (seconds > 0) {
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+ last = last + seconds % 60 + "秒";
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+ }
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+ return last;
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+
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+ }
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+
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+ public static void main(String[] args) {
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+ LocalDateTime now = LocalDateTime.of(2022, 4, 24, 11, 9, 38);
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+ LocalDateTime end = LocalDateTime.of(2022, 4, 25, 14, 12, 32);
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+ String last = betweenTime(now, end);
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+ System.out.println(last);
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+ }
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+
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+}
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+
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wangweiyu