From 593034c68e264b8bd0cdc74d5d70e6a6876dc4fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=87=95=E9=B9=8F?= <mail_yanpeng@163.com>
Date: Wed, 11 Aug 2021 10:15:10 +0800
Subject: [PATCH] =?UTF-8?q?=E6=97=B6=E9=97=B4=E5=A4=84=E7=90=86?=
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---
 src/main/java/DateUtil.java | 78 +++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 src/main/java/DateUtil.java

diff --git a/src/main/java/DateUtil.java b/src/main/java/DateUtil.java
new file mode 100644
index 0000000..5bd23ff
--- /dev/null
+++ b/src/main/java/DateUtil.java
@@ -0,0 +1,78 @@
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.*;
+
+/**
+ * @author yanpeng
+ * @version 1.0
+ * @desc TODO
+ * @company 北京中经网软件有限公司
+ * @date 2021/8/10 9:51
+ */
+public class DateUtil {
+    public static void main(String[] args) {
+        Map<String, Integer> beforeDate = null;
+        try {
+            beforeDate = getBeforeDate(0);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        System.out.println(beforeDate);
+    }
+
+    /**
+     * @param checkCalculateCycle 考核计算周期 0=日 1=周 2=月 3=季 4=年
+     * @return
+     */
+    public static Map<String, Integer> getBeforeDate(int checkCalculateCycle) throws ParseException {
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+        Date parse = sdf.parse("2021-08-01");
+        Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+08:00"));
+//        calendar.setTime(parse);
+        int year = calendar.get(Calendar.YEAR);
+        int month = calendar.get(Calendar.MONTH) + 1;   //获取月份，0表示1月份
+        int quarter = month / 3;
+        Map<String, Integer> map = new HashMap<String, Integer>();
+        map.put("year", year);
+        if (checkCalculateCycle == 4) {
+            map.put("year", --year);
+            return map;
+        } else if (checkCalculateCycle == 3) {
+            if (month <= 3) {
+                map.put("year", --year);
+                map.put("quarter", 4);
+            } else {
+                if (month % 3 == 0) {
+                    quarter--;
+                }
+                map.put("quarter", quarter);
+            }
+            return map;
+        } else if (checkCalculateCycle == 2) {
+            calendar.add(Calendar.MONTH, -1);
+            month = calendar.get(Calendar.MONTH) + 1;
+            map.put("year", calendar.get(Calendar.YEAR));
+            map.put("month", month);
+            map.put("quarter", month % 3 == 0 ? (month / 3) : (month / 3 + 1));
+            return map;
+        } else if (checkCalculateCycle == 1) {
+            calendar.add(Calendar.WEEK_OF_MONTH, -1);
+            month = calendar.get(Calendar.MONTH) + 1;
+            map.put("year", calendar.get(Calendar.YEAR));
+            map.put("quarter", month % 3 == 0 ? (month / 3) : (month / 3 + 1));
+            map.put("month", month);
+            map.put("week", calendar.get(Calendar.WEEK_OF_MONTH));
+            return map;
+        } else if (checkCalculateCycle == 0) {
+            calendar.add(Calendar.DAY_OF_MONTH, -1);
+            month = calendar.get(Calendar.MONTH) + 1;
+            map.put("year", calendar.get(Calendar.YEAR));
+            map.put("quarter", month % 3 == 0 ? (month / 3) : (month / 3 + 1));
+            map.put("month", month);
+            map.put("week", calendar.get(Calendar.WEEK_OF_MONTH));
+            map.put("day", calendar.get(Calendar.DAY_OF_MONTH));
+            return map;
+        }
+        return map;
+    }
+}