fix:添加日期工具类

src/main/java/com/kwan/springbootkwan/constant/CommonConstant.java

@@ -17,4 +17,12 @@ public class CommonConstant {
      * redis前缀
      */
     public static final String PREFIX_REDIS_KEY = "test:";
+    /**
+     * 7天,一周
+     */
+    public static final Integer SEVEN = 7;
+    /**
+     * 3天
+     */
+    public static final Integer THREE = 3;
 }

src/main/java/com/kwan/springbootkwan/utils/DateUtils.java

@@ -2,7 +2,13 @@ package com.kwan.springbootkwan.utils;
 
 import cn.hutool.core.date.DateTime;
 import cn.hutool.core.date.DateUtil;
-import cn.hutool.core.util.StrUtil;
+import com.kwan.springbootkwan.constant.CommonConstant;
+import lombok.extern.slf4j.Slf4j;
+
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
 
 /**
  * 时间工具类
@@ -11,17 +17,98 @@ import cn.hutool.core.util.StrUtil;
  * @version : 2.2.0
  * @date : 2023/7/21 23:29
  */
+
+@Slf4j
 public class DateUtils {
-    public static void main(String[] args) {
+
+    /**
+     * 获取前7天日期
+     */
+    public static String inMonth() {
         // 获取当前日期时间
         DateTime now = DateUtil.date();
-        // 获取当前日期所在的周数
-        int weekOfYear = DateUtil.weekOfYear(now);
         // 获取当前日期所在的月份，并格式化为两位数字
-        String month = String.format("%02d", DateUtil.month(now) + 1);
-        // 将周数和月份拼接成字符串
-        String result = StrUtil.format("当前日期所在的周数：{}，当前日期所在的月份：{}", weekOfYear, month);
-        System.out.println(result);
+        return String.format("%02d", DateUtil.month(now) + 1);
+    }
+
+    /**
+     * 获取前7天日期
+     */
+    public static int inWeek() {
+        // 获取当前日期时间
+        DateTime now = DateUtil.date();
+        // 获取当前日期所在的周数
+        return DateUtil.weekOfYear(now);
+    }
+
+    /**
+     * 获取指定天的3天数据
+     *
+     * @param date
+     * @return
+     */
+    public static List<String> before3Days(String date) {
+        List<String> dates = new ArrayList<>();
+        dates.add(date);
+        for (int i = 1; i < CommonConstant.THREE; i++) {
+            final DateTime dateTime = DateUtil.offsetDay(str2Date(date), -i);
+            dates.add(DateUtil.formatDate(dateTime));
+        }
+        return dates;
+    }
+
+    /**
+     * 获取前7天日期
+     */
+    public static List<String> before7Days() {
+        List<String> dates = new ArrayList<>();
+        final DateTime yesterdayDate = DateUtil.yesterday();
+        final String yesterday = DateUtil.formatDate(yesterdayDate);
+        dates.add(yesterday);
+        for (int i = 1; i < CommonConstant.SEVEN; i++) {
+            final DateTime dateTime = DateUtil.offsetDay(yesterdayDate, -i);
+            dates.add(DateUtil.formatDate(dateTime));
+        }
+        return dates;
+    }
+
+    /**
+     * 获取日期的集合
+     *
+     * @param start
+     * @param end
+     * @return
+     */
+    public static List<LocalDate> getDateRangeList(String start, String end) {
+        LocalDate startDate = LocalDate.parse(start);
+        LocalDate endDate = LocalDate.parse(end);
+        List<LocalDate> dateList = new ArrayList<>();
+        LocalDate currentDate = startDate;
+        while (!currentDate.isAfter(endDate)) {
+            dateList.add(currentDate);
+            currentDate = currentDate.plusDays(1);
+        }
+        return dateList;
+    }
+
+
+    /**
+     * 字符串转日期
+     *
+     * @param str
+     * @return
+     */
+    public static Date str2Date(String str) {
+        return DateUtil.parse(str);
+    }
 
+    /**
+     * 日期转字符串
+     *
+     * @param date
+     * @return
+     */
+    public static String date2Str(Date date) {
+        return DateUtil.format(date, "yyyy-MM-dd");
     }
-}
+}
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