新增2个工具类 获取某个月份的前一年的月份 获取某天的前n年的天

slibra-common/src/main/java/com/slibra/common/utils/DateUtils.java

@@ -3,12 +3,9 @@ package com.slibra.common.utils;
 import java.lang.management.ManagementFactory;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
-import java.time.LocalDate;
-import java.time.LocalDateTime;
-import java.time.LocalTime;
-import java.time.ZoneId;
-import java.time.ZonedDateTime;
+import java.time.*;
 import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
 import java.util.ArrayList;
 import java.util.Calendar;
 import java.util.Date;
@@ -252,6 +249,36 @@ public class DateUtils extends org.apache.commons.lang3.time.DateUtils
     }
 
 
+    public static String getNYearSameDay(String inputDate, int n) {
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern(YYYY_MM_DD);
+        LocalDate date = null;
+        try {
+            date = LocalDate.parse(inputDate, formatter);
+        } catch (DateTimeParseException e) {
+            System.out.println("输入的日期格式不正确，请使用yyyy-MM-dd格式。");
+            return null;
+        }
+        LocalDate lastYearDate = date.minusYears(n);
+        return lastYearDate.format(formatter);
+    }
+
+
+    public static String getNYearSameMonth(String inputDate, int n) {
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM");
+        try {
+            // 解析输入的字符串为YearMonth对象
+            YearMonth currentYearMonth = YearMonth.parse(inputDate, formatter);
+            // 获取去年的同一月份
+            YearMonth previousYearMonth = currentYearMonth.minusYears(n);
+            // 格式化为字符串
+            return previousYearMonth.format(formatter);
+        } catch (DateTimeParseException e) {
+            System.err.println("输入的日期格式不正确，请使用yyyy-MM格式。");
+        }
+        return null;
+    }
+
+
     public static void main(String[] args) {
         Date nowDate = DateUtils.getNowDate();
         Date date = plusDate(1, nowDate);
@@ -259,5 +286,8 @@ public class DateUtils extends org.apache.commons.lang3.time.DateUtils
         System.out.println(date);
         System.out.println(date1);
         System.out.println(getMonthsBefore("2024-02", 2));
+        System.out.println();
+        System.out.println(getNYearSameDay("2024-02-01", 1));
+        System.out.println(getNYearSameMonth("2024-02", 1));
     }
 }