diff --git a/src/main/java/com/yanghuanglin/seq/generator/Generator.java b/src/main/java/com/yanghuanglin/seq/generator/Generator.java
index 1a767c7..ca0a058 100644
--- a/src/main/java/com/yanghuanglin/seq/generator/Generator.java
+++ b/src/main/java/com/yanghuanglin/seq/generator/Generator.java
@@ -50,6 +50,16 @@ public interface Generator {
      */
     String generate(String key, String type, Integer minLength);
 
+    /**
+     * 将{@link #generate(String, String)}得到的序号对象格式化为补零后的序号字符串。实际上只会用到{@link Sequences#getSeq()}属性
+     *
+     * @param sequences 生成的序号对象
+     * @param minLength 序号数字最小长度
+     * @param pattern   格式
+     * @return 格式化后的字符串
+     */
+    String format(Sequences sequences, Integer minLength, String pattern);
+
     /**
      * 将生成的序号对象格式化为指定格式
      * <p/>
diff --git a/src/main/java/com/yanghuanglin/seq/generator/impl/SequencesGenerator.java b/src/main/java/com/yanghuanglin/seq/generator/impl/SequencesGenerator.java
index 650afde..8990d59 100644
--- a/src/main/java/com/yanghuanglin/seq/generator/impl/SequencesGenerator.java
+++ b/src/main/java/com/yanghuanglin/seq/generator/impl/SequencesGenerator.java
@@ -132,6 +132,11 @@ public class SequencesGenerator implements Generator {
         return sequences.format(minLength);
     }
 
+    @Override
+    public String format(Sequences sequences, Integer minLength, String pattern) {
+        return format(sequences.getSeq(), minLength, pattern);
+    }
+
     @Override
     public String format(Long seq, Integer minLength, String pattern) {
         return format(seq, null, minLength, pattern);