From 60f59755491dde9a29052d0b0bf3ec7370cc57ec Mon Sep 17 00:00:00 2001
From: p97balmkq <1348817836@qq.com>
Date: Fri, 5 Jul 2024 16:07:27 +0800
Subject: [PATCH] ADD file via upload

---
 Timer.java | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 Timer.java

diff --git a/Timer.java b/Timer.java
new file mode 100644
index 0000000..043a2f5
--- /dev/null
+++ b/Timer.java
@@ -0,0 +1,93 @@
+package util;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+/**
+ * 日期处理类
+ */
+public class Timer {
+
+    /**
+     * 获取某日期的上个月开始日期
+     * @param currentDate
+     * @param format
+     * @return
+     */
+    public static Date getPrevMonthStartDate(String currentDate , String format){
+        SimpleDateFormat sdf = new SimpleDateFormat(format);
+        Calendar c = Calendar.getInstance();
+        try {
+            c.setTime(sdf.parse(currentDate));
+            c.add(Calendar.MONTH, -1);
+            //设置为1号,当前日期既为本月第一天
+            c.set(Calendar.DAY_OF_MONTH, 1);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        return c.getTime();
+    }
+    /**
+     * 获取某日期的上个月结束日期
+     * @param date
+     * @param format
+     * @return
+     */
+    public static Date getPrevMonthEndDate(String date , String format){
+        SimpleDateFormat sdf = new SimpleDateFormat(format);
+        Calendar c = Calendar.getInstance();
+        try {
+            c.setTime(sdf.parse(date));
+            c.add(Calendar.MONTH , -1);
+            c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DAY_OF_MONTH));
+            c.set(Calendar.HOUR_OF_DAY, 23);
+            c.set(Calendar.MINUTE, 59);
+            c.set(Calendar.SECOND, 59);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        return c.getTime();
+    }
+    /**
+     * 获取某日期的 当前月开始日期
+     * @param currentDate
+     * @param format
+     * @return
+     */
+    public static Date getMonthStartDate(String currentDate , String format){
+        SimpleDateFormat sdf = new SimpleDateFormat(format);
+        Calendar c = Calendar.getInstance();
+        try {
+            c.setTime(sdf.parse(currentDate));
+            c.add(Calendar.MONTH, 0);
+            //设置为1号,当前日期既为本月第一天
+            c.set(Calendar.DAY_OF_MONTH, 1);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        return c.getTime();
+    }
+
+    /**
+     * 获取某日期的 当前月结束日期
+     * @param date
+     * @param format
+     * @return
+     */
+    public static Date getMonthEndDate(String date , String format)
+    {
+        SimpleDateFormat sdf = new SimpleDateFormat(format);
+        Calendar c = Calendar.getInstance();
+        try {
+            c.setTime(sdf.parse(date));
+            c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DAY_OF_MONTH));
+            c.set(Calendar.HOUR_OF_DAY, 23);
+            c.set(Calendar.MINUTE, 59);
+            c.set(Calendar.SECOND, 59);
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        return c.getTime();
+    }
+}