diff --git a/src/main/java/com/ruoyi/common/utils/StringUtils.java b/src/main/java/com/ruoyi/common/utils/StringUtils.java
index 8df5617..6765117 100644
--- a/src/main/java/com/ruoyi/common/utils/StringUtils.java
+++ b/src/main/java/com/ruoyi/common/utils/StringUtils.java
@@ -531,4 +531,53 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils
     {
         return (T) obj;
     }
+
+    /**
+     * 数字左边补齐0，使之达到指定长度。注意，如果数字转换为字符串后，长度大于size，则只保留 最后size个字符。
+     * 
+     * @param num 数字对象
+     * @param size 字符串指定长度
+     * @return 返回数字的字符串格式，该字符串为指定长度。
+     */
+    public static final String padl(final Number num, final int size)
+    {
+        return padl(num.toString(), size, '0');
+    }
+
+    /**
+     * 字符串左补齐。如果原始字符串s长度大于size，则只保留最后size个字符。
+     * 
+     * @param s 原始字符串
+     * @param size 字符串指定长度
+     * @param c 用于补齐的字符
+     * @return 返回指定长度的字符串，由原字符串左补齐或截取得到。
+     */
+    public static final String padl(final String s, final int size, final char c)
+    {
+        final StringBuilder sb = new StringBuilder(size);
+        if (s != null)
+        {
+            final int len = s.length();
+            if (s.length() <= size)
+            {
+                for (int i = size - len; i > 0; i--)
+                {
+                    sb.append(c);
+                }
+                sb.append(s);
+            }
+            else
+            {
+                return s.substring(len - size, len);
+            }
+        }
+        else
+        {
+            for (int i = size; i > 0; i--)
+            {
+                sb.append(c);
+            }
+        }
+        return sb.toString();
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/ruoyi/common/utils/file/FileUploadUtils.java b/src/main/java/com/ruoyi/common/utils/file/FileUploadUtils.java
index ef29444..de4d8cb 100644
--- a/src/main/java/com/ruoyi/common/utils/file/FileUploadUtils.java
+++ b/src/main/java/com/ruoyi/common/utils/file/FileUploadUtils.java
@@ -10,8 +10,8 @@ import com.ruoyi.common.exception.file.FileNameLengthLimitExceededException;
 import com.ruoyi.common.exception.file.FileSizeLimitExceededException;
 import com.ruoyi.common.exception.file.InvalidExtensionException;
 import com.ruoyi.common.utils.DateUtils;
-import com.ruoyi.common.utils.IdUtils;
 import com.ruoyi.common.utils.StringUtils;
+import com.ruoyi.common.utils.uuid.Seq;
 import com.ruoyi.framework.config.RuoYiConfig;
 
 /**
@@ -121,7 +121,8 @@ public class FileUploadUtils
      */
     public static final String extractFilename(MultipartFile file)
     {
-        return DateUtils.datePath() + "/" + IdUtils.fastUUID() + "." + getExtension(file);
+        return StringUtils.format("{}/{}_{}.{}", DateUtils.datePath(),
+                FilenameUtils.getBaseName(file.getOriginalFilename()), Seq.getId(Seq.uploadSeqType), getExtension(file));
     }
 
     public static final File getAbsoluteFile(String uploadDir, String fileName) throws IOException
diff --git a/src/main/java/com/ruoyi/common/utils/file/FileUtils.java b/src/main/java/com/ruoyi/common/utils/file/FileUtils.java
index 96591e4..e94a2fc 100644
--- a/src/main/java/com/ruoyi/common/utils/file/FileUtils.java
+++ b/src/main/java/com/ruoyi/common/utils/file/FileUtils.java
@@ -14,8 +14,8 @@ import javax.servlet.http.HttpServletResponse;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.ArrayUtils;
 import com.ruoyi.common.utils.DateUtils;
-import com.ruoyi.common.utils.IdUtils;
 import com.ruoyi.common.utils.StringUtils;
+import com.ruoyi.common.utils.uuid.IdUtils;
 import com.ruoyi.framework.config.RuoYiConfig;
 
 /**
diff --git a/src/main/java/com/ruoyi/common/utils/IdUtils.java b/src/main/java/com/ruoyi/common/utils/uuid/IdUtils.java
similarity index 88%
rename from src/main/java/com/ruoyi/common/utils/IdUtils.java
rename to src/main/java/com/ruoyi/common/utils/uuid/IdUtils.java
index 45d8ac9..0256511 100644
--- a/src/main/java/com/ruoyi/common/utils/IdUtils.java
+++ b/src/main/java/com/ruoyi/common/utils/uuid/IdUtils.java
@@ -1,6 +1,4 @@
-package com.ruoyi.common.utils;
-
-import com.ruoyi.common.core.lang.UUID;
+package com.ruoyi.common.utils.uuid;
 
 /**
  * ID生成器工具类
diff --git a/src/main/java/com/ruoyi/common/utils/uuid/Seq.java b/src/main/java/com/ruoyi/common/utils/uuid/Seq.java
new file mode 100644
index 0000000..fd88245
--- /dev/null
+++ b/src/main/java/com/ruoyi/common/utils/uuid/Seq.java
@@ -0,0 +1,86 @@
+package com.ruoyi.common.utils.uuid;
+
+import java.util.concurrent.atomic.AtomicInteger;
+import com.ruoyi.common.utils.DateUtils;
+import com.ruoyi.common.utils.StringUtils;
+
+/**
+ * @author ruoyi 序列生成类
+ */
+public class Seq
+{
+    // 通用序列类型
+    public static final String commSeqType = "COMMON";
+
+    // 上传序列类型
+    public static final String uploadSeqType = "UPLOAD";
+
+    // 通用接口序列数
+    private static AtomicInteger commSeq = new AtomicInteger(1);
+
+    // 上传接口序列数
+    private static AtomicInteger uploadSeq = new AtomicInteger(1);
+
+    // 机器标识
+    private static String machineCode = "A";
+
+    /**
+     * 获取通用序列号
+     * 
+     * @return 序列值
+     */
+    public static String getId()
+    {
+        return getId(commSeqType);
+    }
+    
+    /**
+     * 默认16位序列号 yyMMddHHmmss + 一位机器标识 + 3长度循环递增字符串
+     * 
+     * @return 序列值
+     */
+    public static String getId(String type)
+    {
+        AtomicInteger atomicInt = commSeq;
+        if (uploadSeqType.equals(type))
+        {
+            atomicInt = uploadSeq;
+        }
+        return getId(atomicInt, 3);
+    }
+
+    /**
+     * 通用接口序列号 yyMMddHHmmss + 一位机器标识 + length长度循环递增字符串
+     * 
+     * @param atomicInt 序列数
+     * @param length 数值长度
+     * @return 序列值
+     */
+    public static String getId(AtomicInteger atomicInt, int length)
+    {
+        String result = DateUtils.dateTimeNow();
+        result += machineCode;
+        result += getSeq(atomicInt, length);
+        return result;
+    }
+
+    /**
+     * 序列循环递增字符串[1, 10 的 (length)幂次方), 用0左补齐length位数
+     * 
+     * @return 序列值
+     */
+    private synchronized static String getSeq(AtomicInteger atomicInt, int length)
+    {
+        // 先取值再+1
+        int value = atomicInt.getAndIncrement();
+
+        // 如果更新后值>=10 的 (length)幂次方则重置为1
+        int maxSeq = (int) Math.pow(10, length);
+        if (atomicInt.get() >= maxSeq)
+        {
+            atomicInt.set(1);
+        }
+        // 转字符串，用0左补齐
+        return StringUtils.padl(value, length);
+    }
+}
diff --git a/src/main/java/com/ruoyi/common/core/lang/UUID.java b/src/main/java/com/ruoyi/common/utils/uuid/UUID.java
similarity index 96%
rename from src/main/java/com/ruoyi/common/core/lang/UUID.java
rename to src/main/java/com/ruoyi/common/utils/uuid/UUID.java
index fa74297..eef72ee 100644
--- a/src/main/java/com/ruoyi/common/core/lang/UUID.java
+++ b/src/main/java/com/ruoyi/common/utils/uuid/UUID.java
@@ -1,4 +1,4 @@
-package com.ruoyi.common.core.lang;
+package com.ruoyi.common.utils.uuid;
 
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
diff --git a/src/main/java/com/ruoyi/framework/security/service/TokenService.java b/src/main/java/com/ruoyi/framework/security/service/TokenService.java
index 9e86c22..fbe84a2 100644
--- a/src/main/java/com/ruoyi/framework/security/service/TokenService.java
+++ b/src/main/java/com/ruoyi/framework/security/service/TokenService.java
@@ -8,11 +8,11 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Component;
 import com.ruoyi.common.constant.Constants;
-import com.ruoyi.common.utils.IdUtils;
 import com.ruoyi.common.utils.ServletUtils;
 import com.ruoyi.common.utils.StringUtils;
 import com.ruoyi.common.utils.ip.AddressUtils;
 import com.ruoyi.common.utils.ip.IpUtils;
+import com.ruoyi.common.utils.uuid.IdUtils;
 import com.ruoyi.framework.redis.RedisCache;
 import com.ruoyi.framework.security.LoginUser;
 import eu.bitwalker.useragentutils.UserAgent;
diff --git a/src/main/java/com/ruoyi/project/common/CaptchaController.java b/src/main/java/com/ruoyi/project/common/CaptchaController.java
index fecf890..b4fb767 100644
--- a/src/main/java/com/ruoyi/project/common/CaptchaController.java
+++ b/src/main/java/com/ruoyi/project/common/CaptchaController.java
@@ -13,8 +13,8 @@ import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 import com.google.code.kaptcha.Producer;
 import com.ruoyi.common.constant.Constants;
-import com.ruoyi.common.utils.IdUtils;
 import com.ruoyi.common.utils.sign.Base64;
+import com.ruoyi.common.utils.uuid.IdUtils;
 import com.ruoyi.framework.redis.RedisCache;
 import com.ruoyi.framework.web.domain.AjaxResult;
 import com.ruoyi.project.system.service.ISysConfigService;