diff --git a/doc/视频教程.md b/doc/视频教程.md
index b1ac183c..2cfd63ba 100644
--- a/doc/视频教程.md
+++ b/doc/视频教程.md
@@ -26,6 +26,8 @@ javassist字节码增强，asm，cglib，ByteBuddy，了解
 - storage原理讲解
 
 ```
-通过spring的PathMatchingResourcePatternResolver扫描excel文件位置
-
+通过spring的PathMatchingResourcePatternResolver扫描excel文件位置，有方法可以直接获取Resource
+spring的Resource抽象，spring对文件的抽象
+apache的poi，poi可以解析excel
+通过spring的ConversionService去解析excel单元格的内容，通过ConditionalGenericConverter，Converter接口自定义解析规则
 ```
\ No newline at end of file
diff --git a/storage/src/main/java/com/zfoo/storage/manager/StorageManager.java b/storage/src/main/java/com/zfoo/storage/manager/StorageManager.java
index f54bf413..b46b73d9 100644
--- a/storage/src/main/java/com/zfoo/storage/manager/StorageManager.java
+++ b/storage/src/main/java/com/zfoo/storage/manager/StorageManager.java
@@ -74,7 +74,11 @@ public class StorageManager implements IStorageManager {
     @Override
     public void initBefore() {
         var resourceDefinitionMap = new HashMap<Class<?>, ResourceDef>();
+
+        // 扫描Excel的class类文件
         var clazzNameSet = scanResourceAnno(storageConfig.getScanPackage());
+
+        // 通过class类文件扫描excel文件地址
         for (var clazzName : clazzNameSet) {
             Class<?> resourceClazz;
             try {
diff --git a/storage/src/main/java/com/zfoo/storage/model/vo/Storage.java b/storage/src/main/java/com/zfoo/storage/model/vo/Storage.java
index 20161f59..c44a76ef 100644
--- a/storage/src/main/java/com/zfoo/storage/model/vo/Storage.java
+++ b/storage/src/main/java/com/zfoo/storage/model/vo/Storage.java
@@ -33,7 +33,9 @@ public class Storage<K, V> {
     private Class<V> clazz;
 
     private final Map<K, V> dataMap = new HashMap<>();
+    // 非唯一索引
     private final Map<String, Map<Object, List<V>>> indexMap = new HashMap<>();
+    // 唯一索引
     private final Map<String, Map<Object, V>> uniqueIndexMap = new HashMap<>();
 
     private IdDef idDef;