init

ruoyi-cai/src/main/java/com/ruoyi/cai/util/CaiDateUtil.java

@@ -0,0 +1,22 @@
+package com.ruoyi.cai.util;
+
+
+import java.time.DayOfWeek;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.TemporalAdjusters;
+
+public class CaiDateUtil {
+
+
+    public static LocalDate getLastWeekOne(LocalDate date){
+        return date.plusWeeks(-1)
+                .with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY));
+    }
+
+    public static void main(String[] args) {
+        LocalDate one = getLastWeekOne(LocalDate.now());
+        System.out.println(one.format(DateTimeFormatter.ofPattern("yyyyMMdd")));
+    }
+
+}