默认日期格式的支持

yzg-util-base/src/main/java/com/yanzuoguang/util/helper/DateHelper.java

@@ -855,4 +855,24 @@ public class DateHelper {
             return false;
         }
     }
+
+    private static final long HOUR_UNIT = 1000 * 60 * 15;
+
+    /**
+     * 获取小时中的刻度时间
+     *
+     * @param from 来源时间
+     * @return
+     */
+    public static String getHourUnitTime(Object from) {
+        Date dateTime = getDateTime(from);
+        if (dateTime == null) {
+            return null;
+        }
+        Date hour = DateHelper.getDateTime(DateHelper.getDateTimeString("yyyy-MM-dd HH:00:00.000", dateTime));
+        long totalMill = dateTime.getTime() - hour.getTime();
+        long unit = totalMill / HOUR_UNIT;
+        Date to = new Date(hour.getTime() + unit * HOUR_UNIT);
+        return DateHelper.getDateTimeString(to);
+    }
 }

yzg-util-base/src/test/java/helper/TestDateHelper.java

@@ -19,5 +19,8 @@ public class TestDateHelper {
         System.out.println("本月:" + DateHelper.getDateTimeString(DateHelper.getMonthEnd(date)));
         System.out.println("本季度:" + DateHelper.getDateTimeString(DateHelper.getMonth3Start(date)));
         System.out.println("本季度:" + DateHelper.getDateTimeString(DateHelper.getMonth3End(date)));
+
+
+        System.out.println("当前时间刻度:" + DateHelper.getHourUnitTime(new Date()));
     }
 }