集成 Spring Security 组件，重构后，整体逻辑更加清晰

src/main/java/cn/iocoder/dashboard/util/date/DateUtils.java

@@ -0,0 +1,19 @@
+package cn.iocoder.dashboard.util.date;
+
+import java.time.Duration;
+import java.util.Date;
+
+/**
+ * 时间工具类
+ */
+public class DateUtils {
+
+    public static Date addTime(Duration duration) {
+        return new Date(System.currentTimeMillis() + duration.toMillis());
+    }
+
+    public static boolean isExpired(Date time) {
+        return System.currentTimeMillis() > time.getTime();
+    }
+
+}