diff --git a/code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/filters/CrosFilter.java b/code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/filters/CrosFilter.java
index 2207f82..11d1131 100644
--- a/code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/filters/CrosFilter.java
+++ b/code/java/car_dealer/src/main/java/com/cpic/xim/car_dealer/filters/CrosFilter.java
@@ -2,7 +2,7 @@
  * @Author: Kane
  * @Date: 2022-10-09 09:32:33
  * @LastEditors: Kane
- * @LastEditTime: 2022-10-09 09:43:01
+ * @LastEditTime: 2022-10-09 10:38:24
  * @FilePath: \car_dealer\src\main\java\com\cpic\xim\car_dealer\filters\CrosFilter.java
  * @Description: 
  * 
@@ -19,8 +19,18 @@ import javax.servlet.ServletResponse;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+/**
+ * 用于实现CROS功能的过滤器.
+ */
 public class CrosFilter implements Filter
 {
+    /*****************************************************
+     * 用于实现CROS功能的过滤器，直接获取请求头的Origin参数，
+     * 作为响应头的 Access-Control—Allow-Origin 的值。
+     * @param req 请求对象
+     * @param resp 响应对象
+     * @param chain servlet容器传递的filter链
+     *****************************************************/
     @Override
     public void doFilter( ServletRequest req, ServletResponse resp, FilterChain chain )
             throws ServletException, IOException