fix: 公共模块，时间转换工具类。

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/MillisecondsConverter.java

@@ -0,0 +1,44 @@
+package com.ruoyi.common.core.utils;
+
+/**
+ * 业务模块
+ *
+ * @author tianyongbao
+ * @date 2024/12/19
+ */
+public class MillisecondsConverter {
+    private long milliseconds;
+
+    public MillisecondsConverter(long milliseconds) {
+        this.milliseconds = milliseconds;
+    }
+
+    public int convertDays() {
+        return (int) (milliseconds / 86400000);
+    }
+
+    public int convertHours() {
+        return (int) ((milliseconds % 86400000) / 3600000);
+    }
+
+    public int convertMinutes() {
+        return (int) ((milliseconds % 3600000) / 60000);
+    }
+
+    public int convertSeconds() {
+        return (int) ((milliseconds % 60000) / 1000);
+    }
+
+    public String  getConvertResult() {
+        int days = convertDays();
+        int hours = convertHours();
+        int minutes = convertMinutes();
+        int seconds = convertSeconds();
+        return days + " 天 " + hours + " 小时 " + minutes + " 分钟 " + seconds + " 秒 ";
+    }
+    public String  getConvertDayHourResult() {
+        int days = convertDays();
+        int hours = convertHours();
+        return days + "," + hours;
+    }
+}