From 32e76be85bfd14a2ce0dfc9d7baeefff92ca5345 Mon Sep 17 00:00:00 2001
From: wen <1455474577@qq.com>
Date: Sat, 15 Jan 2022 16:32:52 +0800
Subject: [PATCH] =?UTF-8?q?=E6=8F=90=E4=BA=A4=E8=87=AA=E5=B7=B1=E4=BA=8C?=
 =?UTF-8?q?=E6=AC=A1=E5=B0=81=E8=A3=85=E7=9A=84util=E7=B1=BB?=
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---
 .../java/com/xhpc/common/util/MyDateUtil.java | 76 +++++++++++++++++++
 .../com/xhpc/common/util/MyPagingUtil.java    | 34 +++++++++
 2 files changed, 110 insertions(+)
 create mode 100644 xhpc-modules/xhpc-common/src/main/java/com/xhpc/common/util/MyDateUtil.java
 create mode 100644 xhpc-modules/xhpc-common/src/main/java/com/xhpc/common/util/MyPagingUtil.java

diff --git a/xhpc-modules/xhpc-common/src/main/java/com/xhpc/common/util/MyDateUtil.java b/xhpc-modules/xhpc-common/src/main/java/com/xhpc/common/util/MyDateUtil.java
new file mode 100644
index 00000000..a910ddb0
--- /dev/null
+++ b/xhpc-modules/xhpc-common/src/main/java/com/xhpc/common/util/MyDateUtil.java
@@ -0,0 +1,76 @@
+package com.xhpc.common.util;
+
+import cn.hutool.core.date.DateTime;
+
+import java.util.Calendar;
+import java.util.Date;
+
+/**
+ * 进行日期处理的工具类
+ *
+ * @author WH
+ * @date 2022/1/15 15:59
+ * @since version-1.0
+ */
+@SuppressWarnings("all")
+public class MyDateUtil {
+
+    public static void main(String[] args) {
+
+        System.out.println(getCurrentDateStr());
+    }
+
+    /**
+     * 以xxxx年x月xx日 星期x的字符串格式展示当前时间
+     *
+     * @author WH
+     * @date 2022/1/15 16:15
+     * @since version-1.0
+     */
+    public static String getCurrentDateStr() {
+
+        Calendar now = Calendar.getInstance();
+        int year = now.get(Calendar.YEAR);
+        int month = now.get(Calendar.MONTH) + 1;
+        int day = now.get(Calendar.DAY_OF_MONTH);
+        String dayNames[] = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
+        int dayOfWeek = now.get(Calendar.DAY_OF_WEEK) - 1;
+        if (dayOfWeek < 0) dayOfWeek = 0;
+        String week = dayNames[dayOfWeek];
+        String nowDateStr = year + "年" + month + "月" + day + "日 " + week;
+
+        return nowDateStr;
+
+    }
+
+    public static final String DATE_FORMAT_DATE_TIME = "yyyy-MM-dd HH:mm:ss";
+
+    /**
+     * 获取表示所传入的Date对象的Calendar对象
+     *
+     * @param date 要转换的Date对象
+     * @return 表示所传入的Date对象的Calendar对象
+     * @author WH
+     * @date 2022/1/15 16:11
+     * @since version-1.0
+     */
+    public static Calendar getCalendar(Date date) {
+
+        Calendar c = Calendar.getInstance();
+        c.setTime(date);
+        return c;
+    }
+
+    /**
+     * 获取一个yyyy-MM-dd HH:mm:ss格式的当前时间字符串
+     *
+     * @author WH
+     * @date 2022/1/15 16:04
+     * @since version-1.0
+     */
+    public static String getCurrentDateStrInYyyyMmDdHhMmSsFormat() {
+
+        return DateTime.now().toString(DATE_FORMAT_DATE_TIME);
+    }
+
+}
diff --git a/xhpc-modules/xhpc-common/src/main/java/com/xhpc/common/util/MyPagingUtil.java b/xhpc-modules/xhpc-common/src/main/java/com/xhpc/common/util/MyPagingUtil.java
new file mode 100644
index 00000000..7ddeb358
--- /dev/null
+++ b/xhpc-modules/xhpc-common/src/main/java/com/xhpc/common/util/MyPagingUtil.java
@@ -0,0 +1,34 @@
+package com.xhpc.common.util;
+
+/**
+ * 用于进行分页的工具类
+ *
+ * @author WH
+ * @date 2022/1/15 15:25
+ * @since version-1.0
+ */
+public class MyPagingUtil {
+
+    /**
+     * 用于计算MySQL数据库中的limit子句的startIndex值
+     *
+     * @param currentPage 当前要显示的记录的页数
+     * @param items       当前页要显示多少条记录
+     * @return 返回MySQL数据库中的limit子句的startIndex值
+     * @throws IllegalArgumentException 传入的参数不符合要求，发生此异常
+     * @author WH
+     * @date 2022/1/15 15:27
+     * @since version-1.0
+     */
+    public static int calculateStartIndex(int currentPage, int items) throws IllegalArgumentException {
+
+        if ((currentPage - 1) < 0) {
+            throw new IllegalArgumentException("当前页数最小为1");
+        }
+        if (items < 1) {
+            throw new IllegalArgumentException("当前页要显示的记录数最小为1");
+        }
+        return (currentPage - 1) * items;
+    }
+
+}