From 263f08d4fc97380549c10e50f8207107a49a9391 Mon Sep 17 00:00:00 2001
From: luoyuanqiao <2376770955@qq.com>
Date: 星期四, 24 二月 2022 10:38:14 +0800
Subject: [PATCH] 党员统计接口开发

---
 springcloud_k8s_panzhihuazhihuishequ/common/src/main/java/com/panzhihua/common/utlis/DateUtils.java |   91 +++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 91 insertions(+), 0 deletions(-)

diff --git a/springcloud_k8s_panzhihuazhihuishequ/common/src/main/java/com/panzhihua/common/utlis/DateUtils.java b/springcloud_k8s_panzhihuazhihuishequ/common/src/main/java/com/panzhihua/common/utlis/DateUtils.java
index 4165ba5..c07afb2 100644
--- a/springcloud_k8s_panzhihuazhihuishequ/common/src/main/java/com/panzhihua/common/utlis/DateUtils.java
+++ b/springcloud_k8s_panzhihuazhihuishequ/common/src/main/java/com/panzhihua/common/utlis/DateUtils.java
@@ -1038,4 +1038,95 @@
         calendar.set(Calendar.DAY_OF_MONTH, 1);
         return format_yyymmdd.format(calendar.getTime());
     }
+
+    /**
+     * 获取某年的月份最后一天时间
+     * @param year  年份
+     * @return  月份list
+     */
+    public static List<String> getYearLastMonths(Integer year){
+        List<String> list = new ArrayList<>();
+        list.add(getLastDayOfMonth(year,1));
+        list.add(getLastDayOfMonth(year,2));
+        list.add(getLastDayOfMonth(year,3));
+        list.add(getLastDayOfMonth(year,4));
+        list.add(getLastDayOfMonth(year,5));
+        list.add(getLastDayOfMonth(year,6));
+        list.add(getLastDayOfMonth(year,7));
+        list.add(getLastDayOfMonth(year,8));
+        list.add(getLastDayOfMonth(year,9));
+        list.add(getLastDayOfMonth(year,10));
+        list.add(getLastDayOfMonth(year,11));
+        list.add(getLastDayOfMonth(year,12));
+        return list;
+    }
+
+    /**
+     * 获取某年的月份第一天时间
+     * @param year  年份
+     * @return  月份list
+     */
+    public static List<String> getYearFirstMonths(Integer year){
+        List<String> list = new ArrayList<>();
+        list.add(getFirstDayOfMonth(year,1));
+        list.add(getFirstDayOfMonth(year,2));
+        list.add(getFirstDayOfMonth(year,3));
+        list.add(getFirstDayOfMonth(year,4));
+        list.add(getFirstDayOfMonth(year,5));
+        list.add(getFirstDayOfMonth(year,6));
+        list.add(getFirstDayOfMonth(year,7));
+        list.add(getFirstDayOfMonth(year,8));
+        list.add(getFirstDayOfMonth(year,9));
+        list.add(getFirstDayOfMonth(year,10));
+        list.add(getFirstDayOfMonth(year,11));
+        list.add(getFirstDayOfMonth(year,12));
+        return list;
+    }
+
+    /**
+     * 获取某年某月最后一天
+     * @param year  年份
+     * @param month 月份
+     * @return  某年某月最后一天
+     */
+    public static String getLastDayOfMonth(int year,int month)
+    {
+        Calendar cal = Calendar.getInstance();
+        //设置年份
+        cal.set(Calendar.YEAR,year);
+        //设置月份
+        cal.set(Calendar.MONTH, month-1);
+        //获取某月最大天数
+        int lastDay = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
+        //设置日历中月份的最大天数
+        cal.set(Calendar.DAY_OF_MONTH, lastDay);
+        //格式化日期
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+        String lastDayOfMonth = sdf.format(cal.getTime());
+        return lastDayOfMonth;
+    }
+
+    /**
+     *  获取某年某月的第一天
+     * @param year  年份
+     * @param month 月份
+     * @return  某年某月第一天
+     */
+    public static String getFirstDayOfMonth(int year,int month)
+    {
+        Calendar cal = Calendar.getInstance();
+        //设置年份
+        cal.set(Calendar.YEAR,year);
+        //设置月份
+        cal.set(Calendar.MONTH, month-1);
+        //获取某月最小天数
+        int firstDay = cal.getActualMinimum(Calendar.DAY_OF_MONTH);
+        //设置日历中月份的最小天数
+        cal.set(Calendar.DAY_OF_MONTH, firstDay);
+        //格式化日期
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+        String firstDayOfMonth = sdf.format(cal.getTime());
+
+        return firstDayOfMonth;
+    }
 }

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