update

jsowell-common/src/main/java/com/jsowell/common/util/id/IdUtils.java

@@ -147,15 +147,12 @@ public class IdUtils {
      * 生成八位会员id
      */
     public static String getMemberId() {
-        long id = Long.parseLong(SnowflakeIdWorker.getSnowflakeId());
-        StringBuilder sb = new StringBuilder(id + "");
-        StringBuilder reverse = sb.reverse();// 将id翻转：我们发现id很长，且高位很长部分是一样的数
-        id = new Long(reverse.toString()) / 1000;// 切去部分长度
-        while (id > 100000000) {
-            id /= 10;
-        }
-        Integer num = Integer.parseInt(id + "");
-        return String.valueOf(num);
+        long snowflakeId = Long.parseLong(SnowflakeIdWorker.getSnowflakeId());
+
+        // 对雪花 ID 做轻量混洗，再压缩到 8 位数字区间，分布比原来的“反转后截断”更均匀。
+        long mixed = snowflakeId ^ (snowflakeId >>> 33) ^ (snowflakeId >>> 17);
+        long memberId = Math.floorMod(mixed, 90000000L) + 10000000L;
+        return String.valueOf(memberId);
     }
 
     /**