diff --git a/src/com/hellogithub/servlet/retUserAvServlet.java b/src/com/hellogithub/servlet/retUserAvServlet.java
index 692340e..328b522 100644
--- a/src/com/hellogithub/servlet/retUserAvServlet.java
+++ b/src/com/hellogithub/servlet/retUserAvServlet.java
@@ -38,6 +38,7 @@ public class retUserAvServlet extends HttpServlet {
         {
             userEntity = userService.selectUserByName(userEntity.getUserName());
             FileInputStream  fis = new FileInputStream (userEntity.getUserAvatar());
+            String type = userEntity.getUserAvatar().substring(userEntity.getUserAvatar().lastIndexOf(".")+1);
 
                 int size = fis.available();
                 if(size != 0)
@@ -46,8 +47,7 @@ public class retUserAvServlet extends HttpServlet {
                     fis.read(data) ;
                     fis.close();
                     resp.reset();
-                    resp.setHeader("Content-Type", "image/jpg");
-//            resp.setContentType("image/jpg");
+                    resp.setHeader("Content-Type", "image/"+type);
                     OutputStream os = resp.getOutputStream() ;
                     os.write(data);
                     os.flush();